Polly wants to learn if males or females have a more negative attitude towards rodents. She gives each of her classmates the following confidential questionnaire:

Gender:
Please rate how strongly you agree with the following statements according to this scale:
1. strongly disagree
2. disagree
3. neither agree nor disagree
4. agree
5. strongly agree

Rodents are cute
Rodents are scary
Rodents are gross
Rodents are nice

Which data table should Polly use to tabulate and organize the data from the completed questionnaires?​

Answer

The Balanced reaction is: Fe₂O₃ + 3C → 2Fe + 3CO

The grams of iron (Fe) produced = 48.96 grams.

Explanation

Given:

Mass of Fe₂O₃ used = 70.0 grams

What to find:

The grams of iron (Fe) produced.

Step-by-step solution:

The balanced reaction between iron(III) oxide and pure carbon in a blast furnace to produce molten iron metal and carbon monoxide is:

Fe₂O₃ + 3C → 2Fe + 3CO

The next step is to convert 70.0 grams of Fe₂O₃ to moles using the mole formula

Now, we can use the moles of Fe₂O₃ and the mole ration from the equation above to determine the moles of Fe produced.

Finally, we can convert 0.876698603 mol Fe to mass in grams as follows

The grams of iron (Fe) produced is 48.96 grams.

Answer:

The brain

Explanation:

With all those instructions the body recqures to respond to it must be so

Hope it helps

The molar mass of MgCrO4 is approximately 140.30 g/mol.

To determine the molar mass of MgCrO4 (magnesium chromate), we need to calculate the sum of the atomic masses of each individual element in the compound.

The chemical formula MgCrO4 indicates that the compound consists of one magnesium atom (Mg), one chromium atom (Cr), and four oxygen atoms (O).

The atomic masses of the elements can be found on the periodic table:

Magnesium (Mg) has an atomic mass of approximately 24.31 g/mol.

Chromium (Cr) has an atomic mass of around 51.99 g/mol.

Oxygen (O) has an atomic mass of about 16.00 g/mol.

Now, we can calculate the molar mass of MgCrO4 by summing up the atomic masses of each element, considering the respective subscripts:

Molar mass = (Atomic mass of Mg) + (Atomic mass of Cr) + 4 × (Atomic mass of O)

Molar mass = (24.31 g/mol) + (51.99 g/mol) + 4 × (16.00 g/mol)

Molar mass = 24.31 g/mol + 51.99 g/mol + 64.00 g/mol

Molar mass ≈ 140.30 g/mol

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Answer:

Calcium

Explanation:

We must first put down the reaction equation as this will serve as a guide in solving the question.

M(s) + S(s) -----> MS(s)

According to the reaction equation; 1 mole of metal reacts with 1 mole of sulphur. Hence 0.09 moles of sulphur reacts with 0.09 moles of metal.

Now recall that;

Number of moles (n) = mass(m)/ molar mass(M)

Since

mass of metal reacted= 3.6g

Number of moles of metal= 0.09 moles

Then;

Making molar mass of metal the subject of the formula;

Molar mass of metal = mass of metal / number of moles of metal

Molar mass of metal = 3.6g /0.09 moles

Molar mass of metal= 40 gmol-1

The metal having a molar mass of 40gmol-1 is calcium, therefore the metal is calcium.

Answer:

As K >>> 1, the reaction will shift to the products

Explanation:

To know the direction of any reaction you must calculate the equilibrium constant, K. If K is < 1, the reaction will shift to the reactants and if k > 1 the reaction will shift to the products.

With the reactions:

HSO₄⁻ ⇄ SO₄²⁻ + H⁺ Ka = 1.26x10⁻²

And:

NH₄⁺ ⇄ NH₃⁺ + H⁺ Ka = 5.6x10⁻¹⁰

The inverse reaction:

NH₃⁺ + H⁺ ⇄ NH₄⁺ 1/Ka = 1.8x10⁹

The sum of the reactions:

HSO₄⁻ + NH₃⁺ + H⁺ ⇄ NH₄⁺ + SO₄²⁻ + H⁺ K = 1.26x10⁻² ₓ 1.8x10⁹ = 2.3x10⁷

answer and explanation

to determine the mass of any compound we can use the following formula

mass = moles x Molar mass

= 11.21 moles x 107.87g/mol

= 1209.2 grams

therefore there are 1209.2 grams of Ag in 11.21 mols

Answer:48

Explanation:

Answer:  3. 0.125 X 10”23 molecules

Explanation:

Water molecules did not have a slight negative charge on one end and a slight positive charge on another, the loss of polarity would have profound effects on various biological, chemical, and physical processes. The unique properties of water that are vital for life as we know it would be significantly altered, potentially rendering many biological systems nonfunctional and disrupting the stability of ecosystems.

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For exothermic reactions, ΔH is always negative, energy is considered a product, and energy is released in the reaction.

An exothermic reaction is one in which energy, usually in the form of heat, is released to the environment from the reaction. In other words, the final temperature of an exothermic reaction would always be more than the initial temperature.

This also means that heat energy is a product of exothermic reactions and this heat is released to the environment from the reaction.

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Answer:

a, d, and e is correct on edge of the nuity

Explanation:

have a good day

Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, the mass of every substance can be calculated as below.

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.

HNO\(_2\) + KOH  \(\rightarrow\) KNO\(_2\)+ H\(_2\)O

The mole ratio among HNO\(_2\), KOH, KNO\(_2\) and H\(_2\)O is 1:1:1:1.

number of moles of HNO\(_2\)= given mass of HNO\(_2\)/ molar mass of HNO\(_2\)

number of moles of HNO\(_2\)= 0.87 / 31.01

                                          = 0.028 moles

moles of HNO\(_2\), KOH, KNO\(_2\) and H\(_2\)O is  0.028 moles

mass of KOH= moles of KOH× Molar mass of KOH

                     =  0.02× 56.11

                     =1.12g

mass of  KNO\(_2\)=  0.02× 85.1

                        = 1.70g

mass of  H\(_2\)O =0.02× 18

                     = 0.36g

Therefore, the mass of every substance can be calculated as above.

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Answer:

Farmers spray to mitigate crop damage caused by pests. A pest is any biological organism, including weeds, pathogens, and arthropods, that interferes with the production of crops affecting quality and/or yield. ... Pesticides work in many different ways by affecting their target, whether it be a weed, pest, or disease.

Explanation:

this is my answer❤︎

The amount of energy required to change 20g of water to steam is +150 KJ/mol. The standard heat of vaporization of water is 7.5 KJ/mol.

The amount of energy required to convert a liquid to a vapour at constant temperature and pressure is known as latent heat. The heat of fusion is the energy required to convert a solid to a liquid, and the heat of sublimation is the energy required to convert a solid to a gas.

Given:

q = 150 KJ/mol.

m = 20gram

The standard heat of vaporization of water is calculated by given formula

Hv = q / m

Where,

Hv is heat of vaporization of water

q is heat energy

m is mass

By substituting given value in equation we get,

Hv = 150 / 20

= 7.5 KJ/mol

Thus, the standard heat of vaporization of water is 7.5 KJ/mol.

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Answer:

Explanation:

The volume of the object can be found by using the formula

volume = final volume of water - initial volume of water

final volume = 46.7 ml

initial volume = 36.7 mL

We have

volume = 46.7 - 36.7 = 10 mL

We have the final answer as

Hope this helps you

Consequently, add 1453 ml water to 47 ml.

Water is a material that exists in gaseous, solid, and solid phases and is made up of the chemical atoms and oxygen. It is among the common and essential compounds.At normal temperature, it is a flavorless, odorless liquid with the crucial property of dissolving several other compounds.

H 2 O is another name for water. Water is most frequently used for drinking purposes. M2 m of hydrogen or one mole of oxygen make up dihydrogen monoxide, which is what it is. The object is liquid and is at room temperature.

3.13 * x = 1.5 * 0.1

x = 0.047L

So take 47 ml and add 1453 ml of water

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A fireplace poker glowing red when you heat it in the fire is referred to as a physical change.

This change is a reversible one in the physical properties of a substance such as the size, color etc. Physical change doesn't alter or change the chemical composition of a substance and no new products are formed in this process.

A fireplace poker glowing red when you heat it in the fire doesn't change the composition and is reversible when allowed to cool down which is why physical change was chosen as the most appropriate choice.

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a) assuming we are meant to write the formulas for the compounds in the question, we want to write the formula for methane. Methane is compouded by 1 carbon atom and 4 hydrogen atoms, so it has the formula: CH₄.

b) we know it is a complete combustion. A complete combustion of some compound is always its reaction with oxygen (O₂) to form only water (H₂O) and carbon dioxide (CO₂).

So, the incomplete and unbalanced equation is:

c) The combustion occurs in high temperature and in gaseous form. Thus, all compounds are in gaseous form (g).

The unbalcend equation is then:

d) To balance the equation, we can leave CH₄ unchanged and balance the others base on it.

The carbon, C, only appears in CH₄ and CO₂, and in both we have only 1, so it is balanced.

The hydrogen, H, appears in CH₄ and H₂O. We have 4 on the left side and 2 on the right side, so we can double H₂O to fix it:

Now, we have 2 oxygen, O, on the left side and 4 on the right side, so we also need to double O₂ to get it right.

So, the balanced equation is:

Answer:

The name of the covalent compound Cl₂O is dichlorine monoxide.

Hope this helps!

Answer:

true. i looked it up and it says nitrogen is larger.

Answer:

490 J.

Explanation:

The following data were obtained from the question:

Mass (m) = 5 Kg

Height (h) = 10 m

Acceleration due to gravity (g) = 9.8 m/s²

Potential energy (P.E) =..?

Potential energy is the energy stored in a body by virtue of its location. Mathematically, it can be expressed as:

P.E = mgh

Where:

m is the mass of the object measured in kilograms (Kg).

g is the acceleration due to gravity and the value is 9.8 m/s².

h is the height to which the object is located measured in metre (m)

P.E is the potential energy measured in joule (J).

With the above formula, we can obtain the potential energy possed by the object as follow:

P.E = mgh

P.E = 5 x 9.8 x 10

P.E = 490 J

The,the potential energy possed by the object is 490 J

Answer:

Pressure difference = 16.9 torr

Explanation:

The formula to be used since their is a difference in water level in the beaker and burette is;

Atmospheric pressure = pressure of gas in burette + pressure of water

Atmospheric pressure - gas pressure = pressure of water

Therefore, the difference between atmospheric pressure and gas pressure can be seen to be the pressure of the water

The pressure of water in mmHg = 23 cm H20 = 230 mmH2O

To convert to mmHg, we have to divide by 13.6 since mercury is 13.6 times heavier than water.

Pressure of water = 230 mmH2O * (1 mmHg/13.6 mmH20) = 16.9 mmHg

Since I mmHg = 1 torr, therefore,

Pressure difference = 16.9 torr

Answer:

pls answer this link for the answer :D

Explanation:

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Answer:

Matter changes to a plasma state

Explanation:

Plasma is superheated matter, so when matter is heated to the point that electrons are stripped off of atoms forming ionized gas.  Palsma comprises over 99% of the observable universe.  Plasma is visible in the form of stars, nebulas, and sometimes even auroras.

Answer:

C. Matter changes to a plasma state.

Explanation:

Correct on Edge 2022!!!

Good luck everyone, you got this! Have a great day!

Answer:

Explanation:

The following chart presents the number of new and abandoned hazardous waste sites found in various regions in the United States by the 1990s.

A bar graph titled U S Hazardous Waste Sites by Region has region on the x-axis, and number of hazardous sites on the y-axis, from 0 to 350 in increments of 70. New England, 75; Mid-Atlantic, 290; N E Central, 220; N W Central, 100; S Atlantic, 170; S E Central, 45; S W Central, 50; Mountain, 65; Pacific, 150.

Based on this data, in which four regions would you advise someone to live? Which would be the safest for someone to live?

a.

SE Central, SW Central, Mountain, and New England

b.

Mid-Atlantic, NE Central, NW Central, and S. Atlantic

c.

Mid-Atlantic, NE Central, S. Atlantic, and Pacific

d.

NW Central, New England, Pacific, and S. Atlantic

The region that has the largest number of the hazardous waste sites is of the mid-Atlantic which is about 290 sites. Hence option D is correct.

A hazardous waste region is a site that consists of substances that are harmful to humans' health and the environment.

These sites have hazardous chemicals and waste matter that can be toxic and hence are the dumping grounds for various countries as per the graph the mid-Atlantic is the largest site for such activity.

Find out more information about the hazardous waste sites.

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Answer:

66 grams of ice would have to melt to lower the temperature of 352 mL of water from 15 °C to 0 °C.

Explanation:

To calculate the amount of ice that would have to melt to lower the temperature of 352 mL of water from 15 °C to 0 °C, we need to use the formula:

Q = m_water * c_water * ΔT_water + m_ice * Lf

where,
Q = the amount of heat transferred,
m_water = the mass of water, c_water is the specific heat capacity of water,
ΔT_water = the change in temperature of water, m_ice = the mass of ice,
Lf = the specific latent heat of fusion of ice.

First, let's calculate the amount of heat transferred to the water:

Q = m_water * c_water * ΔT_water
Q = 352 g * 1.0 cal/(g*°C) * (15-0) °C
Q = 5,280 cal

Next, we can use the specific latent heat of fusion of ice, which is 80 cal/g, to calculate the amount of heat required to melt the ice:

Q = m_ice * Lf
Q = m_ice * 80 cal/g
m_ice = Q / Lf
m_ice = 5,280 cal / 80 cal/g
m_ice = 66 g

Answer:

Double Covalent

Explanation:

When two of the same element combine it will always be a covalent bond between them and since sulfur has two lone electrons it will make a double bond between the two to have a full octect

Answer:

0.99 μmol/L

Explanation:

From the question given above, the following data were obtained:

Volume of stock solution (V₁) = 20 mL

Concentration of stock solution (C₁) = 18.8 μmol/L

Volume of diluted solution (V₂) = 380 mL

Concentration of diluted solution (C₂) =?

The concentration of the diluted solution can be obtained as follow:

C₁V₁ = C₂V₂

18.8 × 20 = C₂ × 380

376 = C₂ × 380

Divide both side by 380

C₂ = 376 / 380

C₂ = 0.99 μmol/L

Therefore, the concentration of the diluted solution the chemist is working on is 0.99 μmol/L

Answer:

increasing the positive charge of the positively charged object and increasing the negative charge of the negatively charged object would make the oppositely charged objects attract each other more.

Answer: The quantity of pure \(MgSO_4\) in 2.4 g of \(MgSO_4.7H_2O\) is 1.17 g

Explanation:

According to avogadro's law, 1 mole of every substance weighs equal to molecular mass and contains avogadro's number \(6.023\times 10^{23}\) of particles.

To calculate the moles, we use the equation:

\(\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar Mass}}=\frac{2.4g}{246g/mol}=0.0098moles\)

As 1 mole of \(MgSO_4.7H_2O\) contains = 1 mole of \(MgSO_4\)

Thus 0.0098 moles of \(MgSO_4.7H_2O\) contains = \(\frac{1}{1}\times 0.0098=0.0098mole\) of \(MgSO_4\)

Mass of \(MgSO_4=0.0098mol\times 120g/mol=1.17g\)

Thus the quantity of pure \(MgSO_4\) in 2.4 g of \(MgSO_4.7H_2O\) is 1.17 g