CHEMISTRY HIGH SCHOOL

Where should mixing of a chemical prepaint treatment be done, so as to avoid breathing toxic vapors?

Answers

Answer 1
Answer:

Answer:

Outdoors

Explanation:

It should be outdoors because if you do it indoor you will leave the toxitity left in your home.

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The net energy released or absorbed during a reversible chemical reaction is equal to(1) the activation energy of the endothermic reaction
(2) the activation energy of the exothermic reaction
(3) the difference between the potential energy of the products and the potential energy of the reactants
(4) the sum of the potential energy of the products and the potential energy of the reactants

Answers

Answer: The correct answer is Option 3.

Explanation:

The net energy absorbed or released in a reaction is known as total enthalpy change of the reaction. It is designated as \Delta H_(rxn)

It is defined as the difference between the total potential energy of the products and the total potential energy of the reactants. The equation for this is given by:

\Delta H_(rxn)=\sum \Delta H_(products)-\sum \Delta H_(reactants)

where,

\Delta H_(products) = Total potential energy of the products

\Delta H_(reactants) = Total potential energy of the reactants

Hence, the correct answer is Option 3.
3. The difference between the potential energy of the products and the potential energy of reactants.

The Earth's systems are all interdependent, which means that A. each system has no influence on the other systems. B. one system can overpower the other systems, causing damage to the Earth. C. each system works by itself to benefit the Earth. D. each system is unique, yet each interacts with the others.

Answers

The answer to the question is D. each system is unique, yet each interacts with the others. In an interdependent system, each part of the system works in its own way but interacts with the others. When combined together, all the different systems produce individual benefits but interact with one another to produce a huge benefit for the planet Earth.

During fusion, the hydrogen in the Sun is?a. entirely converted to energy.

b. entirely converted to helium.

c. partially converted to energy.

d. partially converted to deuterons.

Answers

i am not sure but i think the answer is no C

it is c partially converted to energy

A student neutralized 16.4 milliliters of HCl by adding 12.7 milliliters of 0.620 M KOH. What was the molarity of the HCl acid?(1) 0.168 M (3) 0.620 M
(2) 0.480 M (4) 0.801 M

Answers

The molarity of the HCl acid is 0.480 M. The correct option is 2.

What is molarity?

Molarity is the division of the mass of the solution to the volume of the solution.

The formula that is used is

\rm M_1V_1= M_1V_2

Putting the values in the equation

0.620 * 12.7 = M1 * 16.4 = 0.480

Thus, the molarity of the HCl acid is 2). 0.480 M.

Learn more about molarity

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Molarity is equal to the moles of solute over liters of solvent. In getting the molarity of HCl, you must know the formula for two solutions which is equal to M1V1 = M2V2.  (16.4 milliliters of HCl)M1 = (12.7 milliliters) (0.620 M KOH) and you have 0.480M HCl. The answer is number 2.

In a chemical reaction occurring in an open beaker, the reactants have a mass of 10.0 g and contain 1000 J of energy. The products in the beaker contain a mass of 5.0 g and 500 J of energy. Which best explains the difference in energy and mass as reactants are converted to products?

Answers

The reaction sure involves the formation of products in gas state and the generation of heat (exothermical reaction)

Answer:

C. law of conservation

Explanation:

C2H5OH is able to dissociate in water to conduct an electric current. This compound could be classified as

Answers

The fact that when in solution C₂H₅OH conducts electricity means that it is an electrolyte so you can automatically cross out A and C (the definition of an electrolyte is a substance that will conduct electricity when in a solution).  I think the correct answer is B due to the -OH group (the - indicates a covalent bond) which allows the molecule to give up a proton (H⁺).
 I hope this helps.  Let me know if anything is unclear.
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