Which kind of reaction is shown below?

2H2O2 → 2H2O + O2

Answers

Answer 1

Answer: The type of reaction is a redox reaction.

Answer 2

Answer: This is a redox reaction/equation.

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How do you think you can use the calorimeter to compare the specific heat capacities of a substance?

Answers

Calorimeter is used for calculating specific heat capacities of a substance.

We can use the calorimeter in order to compare the specific heat capacities of a substance because calorimeter is a device which is used for measuring the heat produced during a mechanical, electrical or chemical reaction. This device has the ability to calculate the heat capacity of materials.

The heat released from the sample is absorbed by the water, which results in an increase in temperature. This calorimeter detect this increase in temperature and provides us information so we can conclude that calorimeter is used for calculating specific heat capacities of a substance.

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The calorimeter burns the object and tells how many calories are generated when the object is burned.

What volume of a 0.40 M Mg(NO3)2 solution contains 89g of Mg(NO3)2?

Answers

The volume of a 0.40 M Mg(NO3)2 solution contains 89g of Mg(NO3)2 is 1.5 L.

What is solution?

Solution is defined as a particular kind of homogenous combination made up of two or more different ingredients. Solute refers to the material that dissolves. Solvents are described as substances that do not dissolve. The substance known as salt water is a solution. A solute and a solvent combine to produce a solution; this is a physical, not a chemical process. A solution is produced when one substance splits apart or dissolves into another.

To calculate this, subtract 89g from 148.3g/mol, the molar mass of magnesium nitrate.

= 89 / 148.3

= 0.6 mole of magnesium nitrate

The volume of solution can be as

= 0.6 moles / 0.40 M

= 1.5 liter.

Thus, the volume of a 0.40 M Mg(NO3)2 solution contains 89g of Mg(NO3)2 is 1.5 L.

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First you need to find the number of moles there are in 89g of Mg(NO₃)₂ . To do this, divide the 89g by the molar mass of magnesium nitrate (148.3g/mol) to get 0.6mol of magnesium nitrate. Then to find the volume of solution that contains 0.6 moles you need to divide 0.6mol by 0.40M to get 1.5L of solution.

I hope this helps. Let me know in the comments if anything is unclear.

If the pressure, volume, and temperature of a gas are known, which can most likely be found by using the ideal gas law

Answers

the ideal gas law equation is as follows

PV = nRT

where P - pressure

V - volume

n - number of moles

R - universal gas constant

T - temperature

so if the pressure, volume and temperature are already known

we are left with n and R

since R is the universal gas constant that has a known fixed value then R too is known

so we are left with 'n'

once we know temperature volume and pressure

we can find the number of moles of gas present using the ideal gas law equation

A.) the molar amount of gas

Hope it helps!

The muscles in the stomach aid in digestion by __________.a. secreting bile
b. churning, or mixing, food
c. opening and closing the stomach
d. absorbing nutrients

Answers

The muscles in the stomach aid in digestion by churning, or mixing, food. Hence, option C is the correct answer.

What is digestion?

Digestion is the complex process of turning the food you eat into nutrients, which the body uses for energy, growth and cell repair needed to survive.

The stomach is a muscular sac that lies between theesophagus and the small intestine in the upper abdomen.

The stomach is not the only part of your digestive system that absorbs food but rather is a part of the digestive system and important for churning food into a consistency that is easier to digest for the rest of your intestines.

Hence, option C is the correct answer.

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Churning or mixing food.

The stomach is a muscular sac that lies between theesophagus and thesmall intestine in the upper abdomen. The stomach is not the only part of your digestive system that absorbs food but rather is a part of the digestive system and important for churning food into a consistency that is easier to digest for the rest of your intestines.

In the chemical reaction in which sucrose is heated and decomposes to form carbon dioxide and water, which of the following is a reactant?a. sucrose
c. water
b. carbon dioxide
d. heat

Answers

A reaction in which the reactants splits to produce two or more products is called a decomposition reaction.

It can be represented as:

XY ------> X + Y

The correct answer is:

Option A. Sucrose

This can be explained as:

The reaction for the decomposition of sucrose is given as:

C₁₂H₂₂O₁₁ (Sucrose) + 12 O₂ -----> 12 CO₂ (Carbon dioxide) + 11 H₂O (water)

The reactant of a reaction is written generally on the left side of the reaction.

The reactant is a substance that reacts and undergoes chemical changes to form products.

Therefore, sucrose is the reactant.

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in the chemical reaction in which sucrose is heated and decomposes to form carbon dioxide and water a. sucrose is a reactant

Rust on weathered rocks is caused by _____.saltation
oxidation
hydrolysis
abrasion

Answers

Rust on weathered rocks is caused by the process of oxidation. Oxidation is a process of chemical weathering that occurs when oxygen combines with minerals in rocks. rust occurs when oxygen combines with iron in rocks to form the reddish brown iron oxide.

Answer: The correct answer is oxidation.

Explanation:

Rust is a reddish-brown colored compound which is formed by the oxidation of Iron to form ferric oxide. The formula for this chemical compound is $Fe-2O_3$