Which statement is true about the total mass of the reactants during a chemical change?

Answer:

B. 275 kPa

Explanation:

Since we need to find the greater value, because 1.50<2.5, then the only greater value would be 275 kPa.

Answer:

2MnO2 + H2O => Mn2O3 + 2OH is the correct balanced equation.

When manganese oxide reacts with water to form a different manganese oxide and hydroxide, the correct balanced equation for this is 2MnO₂ + H₂O ⇾ Mn₂O₃ + 2OH.

The term balance chemical equation is define as the equation which satisfy the law of conservation of mass, i.e., “Total mass of the products is equal to the total mass of all the reactants”.

If a chemical equation is not balanced, it will break the law of conservation of mass. It will indicate that either mass is created or destroyed, which is impossible.

Balanced chemical equations have the equal number and type of each atom on both sides of the equation.  

Thus, When manganese oxide reacts with water to produce a different manganese oxide and hydroxide, the correct balanced equation for this reaction is 2MnO₂ + H₂O ⇾ Mn₂O₃ + 2OH.

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B. i think.

hope i helped! :)

Answer:

See answer below

Explanation:

I have to answer this question in english because is the rule here. I hope you can understand this.

Now, in order to answer this, is really easy. We already have the quantity of SO₂ in the air of a city. This concentration is 14 mg/m³, so we want to know the quantity in 1 L. This quantity can be expressed in mass.

If concentration according to the units is: mg/m³ This means that we have units of mass and volume. So, in order to know the quantity of SO₂ in mass, we need to convert the units of volume m³ to liter.

1 m³ is covered in 1000 L, therefore:

14 mg/m³ * 1 m³/1000 L = 0.014 mg/L

Then, the mass will be:

m = 0.014 mg/L * 1 L

m = 0.014 mg of SO₂

This is the quantity of SO₂ in 1 L.

Answer:

1.1 mol/liter

Explanation:

You would use the M1V1 = M2V2 equation to solve this.

We know M1 is 3.0 M, V1 is 25 milliliters, and V2 is 68 milliliters. We need to find M2.

To find M2, first plug in what you know.

(3.0 M)(25 mL) = M2(68 mL)

Then, divide everything by 68 mL to get M2 by itself

Your answer should be a quite large decimal but I rounded it to 1.1 mol/liter.

Answer:

The concentration of sodium chloride is 1.1 moles/liter.

Explanation:

Answer:

at absolute zero.

Explanation:

absolute zero or 0 kelvin, is where all kinetic movement of electrons ceases in a molecule.

Answer:

125 = 5*4.186*m

m = 125 / 5*4.186 = 5.97g of water.

Explanation:

The water is increased by 5 degrees. This means that for every gram of water, it takes 5*4.186 J to increase the temperature by 5 degrees, aka 5*4.186 J/g

hope this help:)

Answer:

Beta

Explanation:

Beta has signal 0 above and -1 under

Answer:

They are directly related.

Temp decrease then volume decrease

Temp increase then volume increase

Answer:

They are both nuclear reactions that produce energy.

Answer:

LiHCO3 its PH >7

Explanation:

the real ph for it is 11.3 so it makes it more than 7

and if you know it is a conjugate base coming from the weak acid H2CO3 so LiHCO3 is a base

Answer:

Explanation:

Radiation from the sun heats the ground, then the ground heats the air by process of conduction. When that happens air temp. and density start to change causing air convection currents. Hope I help.

Answer:

only 2.5% is fresh water on earth

Answer:

The answer is 3%

Explanation:

Answer:

the movement of large amounts of soil and rock debris down a slope

Explanation:

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Answer:The light-independent reactions use the ATP and NADPH from the light-dependent reactions to reduce carbon dioxide and convert the energy to the chemical bond energy in carbohydrates such as glucose.

Explanation:step-by-step

Answer:

FALSE

Explanation:

I just took the test and put true and it was wrong so it's false. Hope this helps and please mark brainliest!

Answer:

The moon's period of rotation and revolution are equal

Answer:

yes

Explanation:gergrgregbfbwerbebw

Answer:

mitochondria

Explanation:

Cellular respiration occurs primarily in the mitochondria of your cells. The mitochondria is like the powerhouse of cells .

Answer:

Mass will be equal to 874.56 gram

Explanation:

Molar mass of sulfur = 32 u

Molar mass of Florine = 19 u

Therefore molar mass of [tex]SF_2[/tex] [tex]=32+2\times 19=70u[/tex]

So mass of [tex]6.023\times 10^{23}[/tex] particle is 70 gram

Therefore mass of 1 particle

[tex]=\frac{70}{6.023\times 10^{23}}=11.62\times 10^{-23}g[/tex]

Therefore mass of [tex]7.525\times 10^{24}[/tex] particle is

[tex]7.525\times 10^{24}\times 11.62\times 10^{-23}=874.56gram[/tex]

Answer:

b calcium

Explanation:

Explanation:

1) %70 earth is water and %30 is land.

2)" The single cells in the brain communicatethrough electrical and chemical signals.

3) b'coz earth revolve around the sun in365 days and rotates on its axis in 24 hours. It takes 365 days , because it takes that much time to complete one revolution and it takes 24 hours,because it takes time to complete one rotation as mercury takes 81 earthdays to complete one revolution.

4) Human originated from Adam And Eve.

deforestation i hope this helps

Answer:

Deforestation and Cultivation

Explanation:

First I am going to give the definition of deforestation:

Deforestation is basically the removal of trees.

The removal of trees leaves leaves very little vegetative cover to hold heavy rain fall. This is why mudslides and things happen. When the land is clear and flat, the water keeps on going instead of going into the soil. That water that keeps on going is called runoff water. If we planted trees by the rivers, that could take down the height of the floods in towns by 20%

At first I was going to say widening rivers, but that is a way to manage river water. When we lengthen the river, it is so that the water can take more time to reach the river canal.

Definition of Cultivation: The production of food by preparing the land to grow crops (especially on a large scale) animal husbandry - breeding and caring for farm animals. agriculture, tree farming - the cultivation of tree for the production of timber.

I was also going to say Cultivation. Over-cultivation is the excessive use of farmland to the point where productivity falls due to soil exhaustion or land degradation. Now this is actually why we have floods in the USA. The soil cannot soak up any water, therefore the water over flows and that is when a flood starts to happen.

I know this took some time but hope I could help :)

Answer:

What that means is that when pressure and number of moles are kept constant, increasing the temperature will result in an increase in volume. Likewise, a decrease in temperature will result in a decrease in volume. In your case, the volume of the gas decreased by a factor of about 3, from "140.0 mL" to "50.0 mL".

Answer:

Renewable energy

Explanation:

on the other hand, typically emits less CO2 than fossil fuels. In fact, renewables like solar and wind power—apart from construction and maintenance—don't emit any CO2 at all. With renewable energy, you can breathe easier, stay cooler, and create a more comfortable world for generations to come.

Answer:

renewable energy comes from natural resources that can be replenished or replaced during an average human lifetime ; eg, Hydro, solar, wind etc.

fossil fuels can take thousands or even millions of years to naturally replenish; eg, natural gas, coal, oil.

Answer:

Need to broken down more.

Explanation:

Answer:

its FIND NOT fing

Explanation:

Answer:

a. 21.7824 g

b. 0.2362 g

c. 31.5273 g

Please see the answers in the picture attached below.

Explanation:

Please see the step-by-step solution in the picture attached below.

Hope this answer can help you. Have a nice day!

The mass of solute required in each case can be obtained form the stoichiometry of the reaction.

We know that the mass of each solution can be obtained from the relation;

mass/molar mass = concentration × volume

mass = concentration × volume × molar mass

a)

mass =  0.125 M  ×  1.00 L ×  174 g/mol = 21.75 g

b) mass = 0.015 M  × 375 /1000 × 42 g/mol = 0.24 g

c) mass = 0.350 M × 500/1000 × 180 g/mol =31.5 g

Learn more: https://brainly.com/question/9743981

Answer:

It a comet

Explanation:

that why they are also called dirty snowballs

Answer:

A comment

Explanation:

Because I took the test and that 100 and because comets are icy and sometimes lead tale of water droplets behind them