Answers
Answer:
A. 2NaBr + Ca(OH)₂ —> CaBr₂ + 2NaOH
The coefficients are: 2, 1, 1, 2
B. 2NH₃ + H₂SO₄ —> (NH₄)₂SO₄
The coefficients are: 2, 1, 1
Explanation:
A. __NaBr + __Ca(OH)₂ —> __CaBr₂ + __NaOH
The above equation can be balance as follow:
NaBr + Ca(OH)₂ —> CaBr₂ + NaOH
There are 2 atoms of H on the left side and 1 atom on the right side. It can be balance by writing 2 before NaOH as shown below:
NaBr + Ca(OH)₂ —> CaBr₂ + 2NaOH
There are 2 atoms of Na on the right side and 1 atom on the left side. It can be balance by writing 2 before NaBr as shown below:
2NaBr + Ca(OH)₂ —> CaBr₂ + 2NaOH
Thus, the equation is balanced. The coefficients are: 2, 1, 1, 2
B. __NH₃ + __H₂SO₄ —> __(NH₄)₂SO₄
The above equation can be balance as follow:
NH₃ + H₂SO₄ —> (NH₄)₂SO₄
There are 2 atoms of N on the right side and 1 atom on the left side. It can be balance by writing 2 before NH₃ as shown below:
2NH₃ + H₂SO₄ —> (NH₄)₂SO₄
Thus, the equation is balanced. The coefficients are:
2, 1, 1
Related Questions
Write the chemical equation for water
Answers
Answer:
H2O
Explanation:
what is a differentiate solution, colloid, suspension?
Answers
Answer:
Between genuine solutions and suspensions, colloids solutions and suspensions represent a middle ground. The colloid solution's solvent-dispersed particles' diameters range from 10 to 2000 A. Milk and butter are examples
what is langmuir adsorption isotherm?
Answers
\({ \red{ \underline{ \tt{Langmuir \: adsorption \: isotherm:}}}}\)
The defect of Freundlich adsorption isotherm is that it fails at high pressure of the gas.
Langmuir derived the adsorption isotherm based on the theoretical considerations. It is generally applied to chemical adsorption.
It can be expressed as
\({ \blue{ \bold{ \frac{X}{m} = \frac{AP}{1+BP}}}}\)
where,
X = mass of the gas adsorbed
M = mass of the adsorbent
P = equilibrium pressure
I have a joke
Q: why did the magnet cross the road???
A: I don’t know but the metal came with him!!!
Answers
Answer: It was already on both sides of the road!
Explanation:
TRUE OR FALSE!!
All solids have a closely packed, fixed arrangement of particles.
A. True
B. False
this is a test, help!!
Answers
Answer:
false
Explanation:
jk true
A chemist combines 300 mL of a 0.3 M Na2SO4 solution with 200 mL of 0.4 M BaCl2 solution. How many grams of precipitate form
Answers
The mass of the precipitate, BaSO₄ obtained from the given reaction is 18.64 grams
How to determine the mole Na₂SO₄Volume of Na₂SO₄ = 300 mL = 300 / 1000 = 0.3 LMolarity of Na₂SO₄ = 0.3 MMole of Na₂SO₄ =?Mole = Molarity x Volume
Mole of Na₂SO₄ = 0.3 × 0.3
Mole of Na₂SO₄ = 0.09 mole
How to determine the mole of BaCl₂Volume of BaCl₂ = 200 mL = 200 / 1000 = 0.2 LMolarity of BaCl₂ = 0.4 MMole of BaCl₂ =?Mole = Molarity x Volume
Mole of BaCl₂ = 0.4 × 0.2
Mole of BaCl₂ = 0.08 mole
How to determine the limiting reactantBalanced equation
Na₂SO₄(aq) + BaCl₂(aq) —> BaSO₄(s) + 2NaCl(aq)
From the balanced equation above,
1 mole of BaCl₂ reacted with 1 mole of Na₂SO₄.
Therefore,
0.08 mole of BaCl₂ will also react with 0.08 mole of Na₂SO₄.
From the above illustration, we can see that only 0.08 mole of Na₂SO₄ out of 0.09 mole given is neede to react completely with 0.08 mole of BaCl₂.
Therefore, BaCl₂ is the limiting reactant
How to determine the mass of the precipitate (BaSO₄) formedBalanced equation
Na₂SO₄(aq) + BaCl₂(aq) —> BaSO₄(s) + 2NaCl(aq)
From the balanced equation above,
1 mole of BaCl₂ reacted to produce 1 mole of BaSO₄.
Therefore,
0.08 mole of BaCl₂ will also react to produce 0.08 mole of BaSO₄.
The mass of BaSO₄ can be obtained as follow
Mole of BaSO₄ = 0.08 mole Molar mass of BaSO₄ = 137 + 32 + (16×4) = 233 g/mol Mass of BaSO₄ =?Mass = mole × molar mass
Mass of BaSO₄ = 0.08 × 233
Mass of BaSO₄ = 18.64 g
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when the hydrate of cuso4 5h2o is heated did the reaction proceed in the direct of the reactants or products/
Answers
When the hydrate of CuSO4·5H2O (copper sulfate pentahydrate) is heated, it undergoes a chemical reaction that results in the loss of water molecules, leaving behind anhydrous CuSO4 (copper sulfate). This process is known as dehydration. The reaction proceeds in the direction of the products as the anhydrous CuSO4 is the thermodynamically stable form of copper sulfate at high temperatures.
Copper sulfate pentahydrate (CuSO4·5H2O) is a crystalline compound that contains five water molecules (H2O) per formula unit. When this compound is heated, the water molecules are lost, and the remaining compound is anhydrous CuSO4. This process is known as dehydration, and it is an example of a chemical reaction.
The chemical equation for the dehydration of copper sulfate pentahydrate can be represented as follows:
CuSO4·5H2O(s) → CuSO4(s) + 5H2O(g)
In this equation, the arrow points in the direction of the products, indicating that the reaction proceeds in that direction. This means that, upon heating, the hydrate of copper sulfate loses its water molecules, and the anhydrous form of the compound is formed.
The driving force for this reaction is the thermodynamic stability of anhydrous CuSO4 at high temperatures. Anhydrous CuSO4 is more stable than copper sulfate pentahydrate at temperatures above 100°C, and as such, the reaction proceeds in the direction of the products, leading to the formation of anhydrous CuSO4.
In conclusion, the dehydration of copper sulfate pentahydrate results in the formation of anhydrous CuSO4, and the reaction proceeds in the direction of the products due to the thermodynamic stability of anhydrous CuSO4 at high temperatures.
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A sample of vegetable oil with density 913 kg/m” is found to have a mass of 35.1 g. Find the volume of this sample.
volume:
Answers
D = m/v
D = 921 kg/m3
m = 44.1 g = 0.0441 kg
Solve for v by rearranging the equation.D = m/v
vD = m
v = m/D = 0.0441 kg / 921 kg/m3 = 4.79 x 10-5 m3
Using the mechanisms that you just drew, explain why we expect very little of the minor product
a. The minor product involves attack on a primary carbon, which is more sterically hindered than a tertiary carbon b. The minor product requires formation of a primary radical, which is more stable than a tertiary radical. c. The primary alkyl bromide product is less stable than the tertiary alkyl bromide product d. The minor product involves attack on a primary carbon, which is less sterically hindered than a tertiary carbon e. The minor product requires formation of a primary radical, which is less stable than a tertiary radical
Answers
The mechanisms involved in the reaction suggest that the major product is favored over the minor product due to several factors. They are options (a), (b), (c), and (d).
Firstly, the minor product involves an attack on a primary carbon, which is more sterically hindered than a tertiary carbon. This means that the minor product will require more energy to form due to the increased steric hindrance around the primary carbon.
Secondly, the minor product requires the formation of a primary radical, which is more stable than a tertiary radical. This is because primary radicals have more neighboring atoms to stabilize the unpaired electron, whereas tertiary radicals have fewer neighboring atoms to stabilize the unpaired electron. Therefore, the minor product will require more energy to form due to the increased stability of the primary radical.
Thirdly, the primary alkyl bromide product is less stable than the tertiary alkyl bromide product. This means that the primary alkyl bromide will be more susceptible to undergoing further reactions or decomposition than the tertiary alkyl bromide, making it less favorable as a product.
Lastly, the minor product involves an attack on a primary carbon, which is less sterically hindered than a tertiary carbon. This means that the minor product will require less energy to form due to the decreased steric hindrance around the primary carbon.
Overall, the combination of these factors (a), (b), (c), and (d) leads to the expectation of very little of the minor product in the reaction.
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Which of the following 0.150 m solutions has the
greatest boiling-point elevation?
Mg(NO3)2
NaNO3
C2H4(OH)2
Answers
The solution with the greatest boiling-point elevation among the given options is Mg(NO₃)₂.
The boiling-point elevation of a solution depends on the concentration of solute particles. In this case, we have three solutions: Mg(NO₃)₂, NaNO₃, and C₂H₄(OH)₂.
Mg(NO₃)₂ dissociates into three ions: Mg²⁺ and two NO₃⁻ ions. NaNO₃ dissociates into two ions: Na⁺ and NO₃⁻. C₂H₄(OH)₂ does not dissociate, so it remains as one molecule.
Since the boiling-point elevation is directly proportional to the number of solute particles, Mg(NO₃)₂, with three ions per formula unit, will have the greatest boiling-point elevation. NaNO₃ has two ions per formula unit, and C₂H₄(OH)₂ has no ionization, resulting in fewer solute particles and lower boiling-point elevation compared to Mg(NO₃)₂.
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2. Points that do not lie on the same line.
O Ray
O
Line segment
O Point
Non-collinear
Answers
Points that do not lie on the same line are non-collinear or noncollinear.
A gas at 127०C and 10.0 L expands to 20.0 L. What is the new temperature in Celcius? (HINT: You need to convert to Kelvins solve then convert answer back to ०C)
Answers
Answer:
526.85K
Explanation:
Based on Charles's law, the volume of a gas is directly proportional to absolute temperature. The formrula is:
V₁ / T₁ = V₂ / T₂
Where 1 represents the initial state and 2 the final state of the gas
Using the values of the problem:
V₁ = 10.0L
T₁ = 127°C + 273.15K = 400.15K
V₂ = 20.0L
Thus, replacing in the formula:
10.0L / 400.15K = 20.0L / T₂
T₂ = 800K
In Celsius:
800K - 273.15 = 526.85K
cr2o72- which element is reduced in the reaction represented above, and how does its oxidation number change?
Answers
The oxidation number of chromium is +6. In the reaction, it is reduced, meaning its oxidation number decreases. The final oxidation number of chromium is +3.
In the reaction represented by the Cr₂O₇²⁻ ion, the element chromium (Cr) is reduced. Its oxidation number changes from +6 to +3.
In the Cr₂O₇²⁻ ion, each oxygen (O) atom has an oxidation number of -2. The overall charge of the ion is 2-, which means the total oxidation numbers of all the atoms should add up to -2. Since there are seven oxygen atoms, their total oxidation number is (-2) × 7 = -14.
To determine the oxidation number of chromium (Cr), we can set up the following equation;
2(Cr) + 7(-2) = -2
Simplifying the equation, we have;
2Cr - 14 = -2
By solving for Cr, we get;
2Cr = 12
Cr = 6
Initially, the oxidation number of chromium is +6. In the reaction, it is reduced, meaning its oxidation number decreases. The final oxidation number of chromium is +3.
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Which product would form upon heating of the compound shown below? OH HCI Heat OH OH OH
Answers
The balanced equation for the reaction is: HCl + H₂O → HF + 2H₂O
The compound shown below is a mixture of hydrogen chloride (HCl) and hydroxide ions (OH-).
HCl + H₂O → HF + HOH
When this mixture is heated, the hydrogen chloride will dissociate into hydrogen gas (H₂) and hydrogen ions (H+), while the hydroxide ions will combine with the hydrogen ions to form water (H₂O).
Therefore, the product that would form upon heating of the compound shown below is water (H₂O).
HCl + H₂O → HF + HOH
H₂O + 2H+ + 2e- → H₃O+ + 2H₂O
The balanced equation for the reaction is:
HCl + H₂O → HF + 2H₂O
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for a given substance the entropy always increases in the following order: s (gas) < s (liq) < s (solid). (True or False)
Answers
The statement "for a given substance the entropy always increases in the following order: s (gas) < s (liq) < s (solid)" is generally true but there are exceptions.
Entropy is a measure of the degree of randomness or disorder in a system. In general, the more disorderly a system is, the higher its entropy. Therefore, for a given substance, its entropy will tend to increase as it goes from a solid to a liquid to a gas because the particles become more disordered and can move more freely.
However, there are some exceptions to this trend. For example, water is a substance that has a higher entropy in its solid form (ice) than in its liquid form. This is because the crystal structure of ice allows for more disorderly arrangements of water molecules than in liquid water. Another exception can occur when a substance undergoes a phase transition, such as melting or boiling. During these transitions, the entropy of the substance may temporarily decrease even though it eventually increases as the substance becomes more disordered in its new phase.
In summary, while the statement is generally true, there are exceptions to the trend of increasing entropy from solid to liquid to gas, and it is important to consider the specific properties of each substance when discussing its entropy.
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How many grams are in Na2O?.
Answers
Natrium oxide has a molecular mass of 61.98 gmol1. The actual formula for calculating the Gram Molecular Mass of a substance is : Gram Formula Mass = mass of the solute/formula mass of the solute.
The formula weight is a quantity in chemistry that is calculated by multiplying the atomic weight (in atomic mass units) of each element in a chemical formula by the number of atoms of that element in the formula, then adding all of these products together. Sodium oxide or Natrium oxide has a molecular mass of 62 amu, which is the sum of two sodium atoms and one oxygen atom. The mass of sodium is 23 amu. Because there are two sodium atoms, the mass of sodium in the molecules is 223=46 amu. Because there is only one Oxygen atom in the molecule, the mass of oxygen in the molecule is 16 amu because it has 8 protons and 8 neutrons. To calculate the molecule's mass, add the mass of sodium (46 amu) and the mass of oxygen (16 amu).
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What type of reaction is it called after a & b mix together on the surface of an object?
Answers
When a and b are mixed on the surface of an object, a chemical reaction takes place called a Combination reaction.
What kind of reaction results when a and b combine on an object's surface?When two or more compounds (reactants) combine to form a single component, this is known as a direct combination reaction, also known as a synthesis reaction (product). These processes are described by equations of form X + Y → XY (A+B → AB). A combination reaction occurs when two or more components combine to form a single compound. In other terms, a combination reaction is a chemical reaction that occurs when two or more atoms or compounds react to create a single component. In a combination reaction, two reactants combine to create a single product. When a and b are mixed on the surface of an object, a chemical reaction takes place called a combination reaction since a new substance ab is prepared by the combination of a and b.To learn more about Combination reactions refer to:
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decide whether each label describes a solution that is acidic, neutral, or basic, and then drag it into the appropriate bin.
Answers
Acidic: a solution with a higher concentration of hydrogen ions (H⁺) than hydroxide ions (OH⁻), rainwater, lemon juice, solution with a pH of 6.
Neutral: a solution with equal concentrations of hydroxide ions (OH⁻) and hydrogen ions (H⁺), pure water, solution with a pH of 7.
Basic: a solution with a higher concentration of hydroxide ions (OH⁻) than hydrogen ions (H⁺), liquid soap, solution with a pH of 12.
The pH scale is a measure of the acidity or alkalinity of a solution. It ranges from 0 to 14, with 7 being considered neutral. A solution with a pH less than 7 is acidic, indicating a higher concentration of hydrogen ions (H⁺) relative to hydroxide ions (OH⁻) in the solution. As the pH decreases, the acidity of the solution increases.
A solution with a pH of 7 is considered neutral, meaning that the concentration of hydrogen ions is equal to the concentration of hydroxide ions, resulting in a balanced solution.
On the other hand, a solution with a pH greater than 7 is basic or alkaline. It indicates a higher concentration of hydroxide ions (OH⁻) relative to hydrogen ions (H⁺). As the pH increases, the basicity or alkalinity of the solution increases.
The pH scale provides a convenient way to categorize solutions as acidic, neutral, or basic based on their hydrogen ion concentration, helping us understand their chemical properties and behavior.
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does lead melt into individual atoms or molecules?
Answers
Which of the following elements are found in the same period?
a) Cu and Fe
Ob) Cl and Kr
Oc) C and AI
d) B and Ga
e) Mg and Rb
Answers
Answer:
d
Explanation:
b and ga are same period
Find a1 of this geometric sequence:
d = 6 and s8 = 440
s8 is the sum of the first 8 terms
d is the common difference
Answers
The first term (a₁) of the geometric sequence can be calculated as 20.
Determine the geometric sequence?In a geometric sequence, each term is found by multiplying the previous term by a constant ratio. The formula to find the sum of the first n terms (Sn) of a geometric sequence is given by:
Sn = a₁ * (1 - rⁿ) / (1 - r)
where a₁ is the first term, r is the common ratio, and n is the number of terms.
In this case, we are given that d (common difference) is 6 and s8 (sum of the first 8 terms) is 440. To find the first term a₁, we need to manipulate the sum formula.
Using the formula for the sum of the first 8 terms, we can write:
440 = a₁ * (1 - r⁸) / (1 - r)
We are not given the common ratio directly, but we can derive it using the common difference (d). In a geometric sequence, the common ratio (r) is found by taking the dth root of 1, where d is the common difference. In this case, r = √1 = 1.
Now, substituting r = 1 in the sum formula, we have:
440 = a₁ * (1 - 1⁸) / (1 - 1)
440 = a₁ * 0 / 0
Since we have 0/0, it means the equation is indeterminate, and any value of a₁ can satisfy the equation. Therefore, there is no unique solution for the first term (a₁).
Therefore, the initial term (a₁) of the geometric sequence can be determined as 20.
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5 points
14. What is the molality of a solution with 98.0 grams KOH in 425 grams
H20?*
A. 0.412 molal
B. 4.12 molal
C. 41.2 molal
D. 231 molal
Answers
Answer:
C 41.2
Explanation:
I took the test ez
brainliest and 5 star pls
A pharmaceutical manufacturer conducted a crossover study with an anticonvul- sant drug (DPH) used in the management of grand mal and psychomotor seizures. A single dose of DPH was given to a subject, and the plasma level of the drug was measured 12 hours after the drug was administered. The four treatments were (A) 100 mg generic DPH product in solution, (B) 100 mg manufacturer DPH in cap- sule, (C) 100 mg generic DPH product in capsule, and (D) 300 mg manufacturer DPH in capsule.
Answers
Based on the information provided, the pharmaceutical manufacturer conducted a crossover study to compare the effectiveness of different formulations of an anticonvulsant drug (DPH) used to manage grand mal and psychomotor seizures.
The four treatments involved are:
(A) 100 mg generic DPH product in solution
(B) 100 mg manufacturer DPH in capsule
(C) 100 mg generic DPH product in capsule
(D) 300 mg manufacturer DPH in capsule
In this study, a single dose of DPH was given to a subject, and the plasma level of the drug was measured 12 hours after the drug was administered. The goal of this study is to compare the bioavailability of these different treatments to determine the most effective dosage and formulation of the anticonvulsant drug.
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H2
Define the Omnipotent view of management ( 5 pts)
Define the Symbolic view of management ( 5 pts)
What works best, in your opinion for the current state that ABC CO is in ? ( explain and
justify)–5pts
The importance of setting the right organization culture is clearly an urgent need for
ABC -Describe what kind of culture should be created – what will be its characteristics ?
(5 pts)
How about the organizational environment ? (customers , suppliers , competitors ,
economic , legal , socio cultural) - what needs to be done ? ( 5 pts)
Answers
The Omnipotent view of management refers to the belief that managers are directly responsible for an organization's success or failure. According to this view, managers have the power and control to make decisions that will significantly impact the organization's performance.
In terms of the organizational environment, ABC CO needs to focus on several aspects. Firstly, it should prioritize building strong relationships with customers by understanding their needs and delivering value through its products or services. Secondly, maintaining good relationships with suppliers is crucial to ensure a reliable supply chain and access to necessary resources. Thirdly, keeping a close eye on competitors is essential to stay competitive and identify opportunities for differentiation. Lastly, monitoring and adapting to economic, legal, and socio-cultural factors is vital to ensure compliance with regulations and aligning the organization with societal trends and expectations.
In conclusion, the Omnipotent view of management emphasizes the influence of managers in shaping organizational outcomes, while the Symbolic view recognizes the significance of external factors. For the current state of ABC CO, a balanced approach that considers both internal and external factors would be beneficial. The culture should promote collaboration, innovation, and adaptability, while the organization should focus on building strong relationships with customers, suppliers, and competitors while adapting to the economic, legal, and socio-cultural environment.
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Rashad and Kendra were walking through the park and noticed several hummingbirds on a tree with yellow flowers. They wanted to know if the color yellow attracts hummingbirds more than other colors. Rashad and Kendra decided to test their hypothesis by doing an experiment in which they set up four hummingbird feeders with the same amount of food and placed them in locations only hummingbirds could reach. One feeder was yellow, one was red, one was blue, and one was clear. Each day for one week, Rashad and Kendra measured and recorded the amount of food left in each of the feeders. At the end of the experiment the red feeder had the least amount of food left in it. What conclusion should Rashad and Kendra reach?
Answers
Answer:
Yellow does not attract hummingbirds.
Explanation:
The most food wasn't taken out of the yellow feeders.
Answer:
The results failed to support the hypothesis that hummingbirds are most attracted to the color yellow.
Explanation:Cause i got it right
what is the mole ratio between ammonia and nitrogen in the above reaction?
Answers
The chemical equation of the production of ammonia is shown in figure 1 and it shows that the mole ratio for ammonia and nitrogen gas is 2:1.
What is mole ratio?
A mole ratio in chemistry is the ratio of the mole quantities of any two chemicals that are involved in a chemical reaction. The balanced chemical equation for the reaction, which displays the proportional numbers of molecules or moles of each reactant and result, is where it is generated. Stoichiometry, or the computation of the amounts of reactants and products in a chemical process, makes use of mole ratios. They can be used to forecast how much of a product will be formed from a given amount of reactant or to figure out how much of one material is required to react completely with a given amount of another substance.To know more about mole ratio, click the link given below:
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In your own words, explain the process of how blood circulates through the body to supply oxygen, nutrients and remove waste. (Will give brainliest and a heart) Thank you! (Don’t copy and paste pls this is for a grade)
Answers
Answer:
The blood circulatory system (cardiovascular system) delivers nutrients and oxygen to all cells in the body. It consists of the heart and the blood vessels running through the entire body. The arteries carry blood away from the heart; the veins carry it back to the heart. The system of blood vessels resembles a tree. The smallest arteries end in a network of tiny vessels known as the capillary network.
There isn't just one blood circulatory system in the human body, but two, which are connected, The systemic circulation provides organs, tissues and cells with blood so that they get oxygen and other vital substances. The pulmonary circulation is where the fresh oxygen we breathe in enters the blood.
Explanation:
Which of the following sciences contribute to the field of environmental
science?
a. physics and chemistry
c. social sciences
OS
b. biology and earth science d. all of the above
Answers
Answer:
d
Explanation:
The correct answer is option D: all of the above.
Environmental science is a multidisciplinary field of study that encompasses; physical science, biological sciences, social sciences and even aspects of the humanities.
Social sciences like anthropology have a lot of bearing on environmental science.
Physics, chemistry, biology and earth sciences play a key role in understanding important aspects of the natural environment.
Therefore; Physics, chemistry, biology and earth sciences and social sciences are all relevant in environmental science.
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a newspaper published an article about a study in which researchers subjected laboratory gloves to stress. among vinyl gloves, % leaked viruses. among latex gloves, % leaked viruses. using the accompanying display of the technology results, and using a significance level, test the claim that vinyl gloves have a greater virus leak rate than latex gloves. let vinyl gloves be population 1.
Answers
The null hypothesis is rejected since the Z-value is higher than the crucial value. The prevalence of vinyl gloves which leak viruses is higher than the prevalence of latex gloves which leak viruses.
How is a virus defined?A length of nucleotides (either DNA or RNA), encased in a protein coat, makes up a virus, an infectious bacterium. Since viruses are unable to multiply on their own, they must infect host cells in order to utilise those cells' components as building blocks for their own replication.
What makes something a virus?virus, an infectious agent with a small size and straightforward chemical makeup that can reproduce exclusively in live cells of bacteria, plants, or animals. The word for "poison" or "slimy liquid" in the name is Latin in origin. The first proof of the biological nature of viruses was provided by research done in 1892 either by Russian scientist Dmitry
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At which point is the slump block located?
Answers
Explanation:
At 4th point the slump block is located
hope this helps you
have a great day :)
It is point 2, for anyone who sees this is the future