need help please :'((((((((((

Answer: 8.979

Explanation:

It will affect the population size through the following:

Gestational period is the period in which organisms carries its young in  the

uterus before delivery. Animals which have short gestational period have a

high birth rate as they can get pregnant as many times a possible during the

year.

This therefore brings about an increase in the individuals present in the

ecosystem. The option A is therefore the most appropriate choice.

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In this question, we have to find the amount of energy required to melt ice at 0°C, and in order to do that, we will be using the Calorimetry formula but modified for melting of ice, the formula will be:

Q = m*ΔHfusion

m is 12.80 grams

ΔHfusion is 334 J/g

Now we add these values into the formula:

Q = 12.80 * 334

Q = 4275 Joules are required

Answer:

I want to say (A) but i also want to say (C) but i can be wrong. most likely (C)

Explanation:

hope this helps lol and have a great day

Answer:

honestly this is kind of an opinionanated question because some people think that the vaccine dosen't work. Like I think that, but some other people might think differently so im gonna go with answer c.

Explanation:

Answer:

B

Explanation:

Answer:

We need more? What else is in the question? This is unanswerable.

Explanation:

Sodium bicarbonate and acetic acid are not good substitute for sodium azide in airbags since the require more mass and produce less gas.

The chemical equation for the production of nitrogen gas from sodium azide is given below:

1 mole or 66 go of sodium azide produces 3 moles or 67.2 L of nitrogen gas.

The equation for the production of carbon dioxide from sodium bicarbonate and acetic acid is given below:

1 mole, 106 g of Na₂CO₃ and 1 mole, 82 g of CH₃COOH are required to produce 1 mole or 22.4 L of CO₂.

The mass of sodium azide required is less than that of sodium bicarbonate and acetic acid required. Also, sodium azide produces a greater volume of gas. Therefore, sodium bicarbonate and acetic acid are not good substitute for sodium azide in airbags.

In conclusion, sodium azide is a better choice in airbags.

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We can see here that the best fuel is the one that produces the most heat per unit mass. In this case, the fuel that produces the most heat per unit mass is methanol.

Fuel is a substance that is used to produce energy through combustion or other chemical reactions. It is commonly utilized to power various forms of transportation, generate heat or electricity, and operate machinery and appliances.

The results of the experiment are shown below:

Fuel            Mass (g)      Heat produced (J)       Heat per gram (J/g)

Methanol 1.0                          350                   350

Ethanol         1.0                          250                   250

Propane         1.0                          200                   200

Butane         1.0                          150                            150

Pentane         1.0                          100                            100

It is important to note that the results of this experiment are only a measure of the heat produced by the fuels.

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We can compute the number of moles of oxygen created in the process using the supplied equation. We know that two moles of water (2H2O) and one mole of oxygen (O2) are created for every two moles of hydrogen peroxide (2H2O2) consumed.

Given that the number of moles of hydrogen peroxide (2H2O2) is 0.2 mol, the number of moles of oxygen created may be calculated as follows: 0.1 mol O2 = 0.2 mol x (1 mol O2/2 mol 2H2O2).

As a result, the amount of oxygen created in the reaction 2H2O2(aq) 2H2O(l) + O2(g) is 0.1 mol. The correct response to the question is 0.1  Mole in total.

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Answer:

I think that it might be 2.7

Explanation:

Dissolve 60g of potassium bromide in 340g of water to produce 15% (mass/mass) aqueous solution of potassium bromide.

Here we have to prepare a total of 400 g of solution. Aqueous solution means the solvent we use here is water.

So to prepare 400 g of 15% aqueous solution of potassium bromide, we need to find out how many grams of potassium bromide need to be dissolved in water and how many grams of water must be used.

Here the weight percent is given, that is 15%

       15/100 = weight of potassium bromide/ 400 g

       0 .15      = weight of potassium bromide / 400

      weight of potassium bromide needed = 0.15 × 400

                                                                       =  60 g

So, we calculated the required amount of potassium bromide as 60 grams. The total weight of the solution to be made is 400 grams.

So amount of water required = 400 - 60

                                                =  340 g

So we need to mix 60 grams of potassium bromide in 340 grams of water to get a 15% (mass/mass) aqueous solution.

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Answer:

The answer is c. ( mutualistic ).

Explanation:

The relationship between cotton plants and wasps is an example of mutualism. The cotton plants provide a food source in the form of nectar for the wasps, and in return, the wasps serve as pollinators for the cotton plants, which helps the plants reproduce. This is a mutually beneficial relationship, as both species benefit from the interaction. Therefore, the answer is (c) mutualistic.

If this helps, please mark my answer as brainliest so I can get better rank:) thank you

To draw a Bohr Rutherford diagram for carbon-12, we would have the symbol C in the center, with 2 electrons in the first energy level and 4 electrons in the second energy level, arranged in pairs. Each energy level would be represented by a circle around the nucleus, with the appropriate number of electrons placed in the circles.

A Bohr Rutherford diagram is a visual representation of the electron arrangement in an atom. Carbon-12 has 6 protons and 6 neutrons, which means it has 6 electrons as well since it is a neutral atom. In a Bohr Rutherford diagram, the nucleus is represented by the symbol for the element and the protons and neutrons are shown as small circles inside the symbol. The electrons are represented as dots or circles around the symbol, in the order of increasing energy levels.

In the case of carbon-12, the first energy level can hold a maximum of 2 electrons, and the second energy level can hold a maximum of 8 electrons. Therefore, the first energy level will have 2 electrons, and the remaining 4 electrons will go in the second energy level.

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Answer:

As you move across a period the electrons are being added to the same shell. But, protons are being added as well. This makes the nucleus more positively charged and, increasing protons has a greater effect than electrons. So, there is a greater nuclear attraction and, because the electrons are being added to the same shell that shell gets pulled in more. This causes a decrease in atomic radius.

Explanation:

The primary reason that atomic radius decreases as you move from left to right across the periodic table is; Due to the increase in electrostatic attraction between the positively charged nucleus and the negatively charged electrons.

The number of shells in elements located in the same period are equal.

However, with successive increase in the atomic number, the number of electrons and protons increases.

Consequently, the electrostatic attraction between the positively charged nucleus and negatively charged electrons increases and the radius reduces accordingly.

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Answer:  2.73 g PbSO4

Explanation:

1) solvefor moles Pb(no3)2

0.10 M X 0.09 L =0.009 moles Pb(NO3)2

2) stoichiometry from balanced chemical equation

___Pb(NO3)2 + ___H2SO4--->   PbSO4 +  ___2 HNO3

0.009 moles Pb(NO3)2 X (1 mole PbSO4 / 1 mole Pb(NO3)2) X (303.2516 g PBSO4/ 1mole PbSO4) = 2.73 g PbSO4

If a mixture of two moles each of gases A and B are mixed to give a total pressure of 20 atm pressure, the partial pressure of gases A and B is 10 atmospheres.

Pressure is defined as the force applied on an object perpendicular to it's surface per unit area over which it is distributed.Gauge pressure is a pressure which is related with the ambient pressure.

There are various units by which pressure is expressed most of which are derived units which are obtained from unit of force divided by unit of area . The SI unit of pressure is pascal .

It is a scalar quantity which is related to the vector area element with a normal force acting on it.It is distributed over solid boundaries and across arbitary sections of fluid normal to the boundaries at every point.

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The volume of carbon dioxide gas forms is equal to 48 L and The volume of oxygen gas needed is 76 L.

A combustion reaction can be explained as a reaction that forms fire and takes place at a high temperature. Combustion Reaction is the combustion of hydrocarbon reacts with oxygen gas to give carbon dioxide and water molecules.

Given the chemical reaction of the combustion reaction of hexane:

\(2C_6H_{14}(g) + 19O_2(g) \longrightarrow 12CO_2(g)+14H_2O(g)\)

Given the volume of hexane = 8.00 L

The number of moles of hexane  = 8/22.4 = 0.357 mol

The moles of oxygen required to react with 0.357 mol of Hexane is equal to :

= (19/2) × 0.357

= 3.39 mol

The volume of oxygen gas = 3.39 × 22.4 = 76 L

The moles of CO₂ produced from 0.357 mol of Hexane is equal to :

= (12/2) × 0.357

= 2.14 mol

The volume of carbon dioxide gas forms = 2.14 × 22.4 = 48 L

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Answer:

that element is likely to be a non metaland a gas

Answer:

so so

Explanation:

this your question?? <_>

The number of moles present in 29.5 grams of argon is 0.74 mole.

The atomic mass of argon is given as;

Ar = 39.95 g/mole

The number of moles present in 29.5 grams of argon is calculated as follows;

39.95 g ------------------------------- 1 mole

29.5 g ------------------------------ ?

\(= \frac{29.5}{39.95} \\\\= 0.74 \ mole\)

Thus, the number of moles present in 29.5 grams of argon is 0.74 mole.

"Your question seems to be missing the correct symbol for the element"

Argon = Ar

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Answer:

ok, here is your answer

Explanation:

AI-generated answer

To find the mass of oxygen that reacted, we need to use the Law of Conservation of Mass, which states that in a chemical reaction, the mass of the reactants equals the mass of the products.

First, we need to find the number of moles of hydrogen that reacted:

Molar mass of hydrogen (H₂) = 2.016 g/mol

Number of moles of H₂ = mass/molar mass = 46.2 g/2.016 g/mol = 22.92 mol

Next, we need to use the balanced chemical equation to find the number of moles of water produced:

hydrogen + oxygen → water

2H₂ + O₂ → 2H₂O

From the equation, we can see that for every 2 moles of H₂, 1 mole of O₂ is required to produce 2 moles of H₂O. Therefore, the number of moles of O₂ required to produce 22.92 moles of H₂O is:

Number of moles of O₂ = 1/2 x 22.92 mol = 11.46 mol

Finally, we can find the mass of oxygen that reacted by using its molar mass:

Molar mass of oxygen (O₂) = 32.00 g/mol

Mass of oxygen = number of moles x molar mass = 11.46 mol x 32.00 g/mol = 366.72 g

Therefore, the mass of oxygen that reacted is 366.72 g.

Cobalt(ll)oxide is the scientific name for the ionic compound CoO. Co and oxygen are both in the +2 and -2 oxidation states, respectively. This suggests that option an is erroneous because the chemical formula presented is correct.

Option b is the right decision since Co2O3's chemical name, cobalt(III)oxide, is correct and the given chemical name, dicobalt trioxide, is incorrect.

c. This option appears to be erroneous because CoO2's chemical name, cobalt(IV)oxide, is the proper one.

d. Copper(I)sulfide is the chemical name for Cu2S. Since S is in an oxidation state of -2 in this case while Cu is in an oxidation state of x, (2x + -2) = 0 and x = +1. As a result, option d is valid because the molecular name of Cu2S is given.

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Answer: It is option 4

Explanation:

The Chlorine have to share 2 electrons

Answer:

Reduction involves a half-reaction in which a chemical species decreases its oxidation number, usually by gaining electrons. The other half of the reaction involves oxidation, in which electrons are lost. Together, reduction and oxidation form redox reactions (reduction-oxidation = redox).

Explanation:

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The pOH of the 0.001 M NaOH solution is approximately 3.

To determine the pOH of a solution, we need to know the concentration of hydroxide ions (OH-) in the solution.

In the case of a 0.001 M NaOH solution, we can assume that all of the NaOH dissociates completely in water to form Na+ and OH- ions. Therefore, the concentration of hydroxide ions in the solution is also 0.001 M.

The pOH is calculated using the equation:

pOH = -log[OH-]

Substituting the concentration of hydroxide ions, we have:

pOH = -log(0.001)

Using a calculator, we can evaluate the logarithm:

pOH ≈ 3

Therefore, the pOH of the 0.001 M NaOH solution is approximately 3.

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Answer:

the answer is none of the above

Chromosomes important  because they play a role in cell division.

Cell division is  described as the process by which a parent cell divides into two daughter cells and usually occurs as part of a larger cell cycle in which the cell grows and replicates its chromosome before dividing.

Chromosomes has another function of ensuring that each new cell receives a complete set of genetic information which is required  for proper cell function and development.

In conclusion, there are two types of cell division which are  mitosis and meiosis.

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Answer: B) metals, non-metals, metalloids

An example of a metal is iron. A non-metal example is oxygen, which is a gas at STP (standard temperature and pressure).

A metalloid is a bit of a mix between a metal and non-metal element. It's sorta like an element that has both properties of metals and non-metals, or it's in a murky gray area. An example of a metalloid would be silicon.