CHEMISTRY HIGH SCHOOL

Which fuel is used for nuclear power?a. coal
b. oil
c. natural gas
d. uranium

Answers

Answer 1
Answer: Hello,

The fuel used for nuclear power is Uranium.

So uranium is used for nuclear power.

Thanks for using brainly.
Answer 2
Answer: Correct option is D. Uranium because atoms of uranium helps to replaces the burning of coal or gas.

Hope this helps you..  :)

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Baking a cake is an example of -a. forming mixtures.
b. forming solutions.
c. exothermic reactions.
d. endothermic reactions.

Answers

I think the correct answer is D. Baking a cake is an example of endothermic reaction. The chemical changes happening when you bake a cake includes denaturing proteins in milk, eggs, and flour. Chemical bonds are broken and new bonds are made. To aid these changes, heat is supplied by the heat in an oven.

How to calculate molar mass

Answers

 Molar masses of chemical compounds are equal to the sums of the molar masses of all the atoms in one molecule of that compound. After that, If you have a subscript in a chemical formula, then you multiply the number of atoms of anything next to that subscript by the number of the subscript. I'm kinda new to this stuff. Hopefully I helped :/
Molar mass is the sum of all atomic masses in a given compound in relative grams. To explain how to calculate the Molar mass, let me show you an example.

Calculate the Molar mass of H2O

now, atomic mass of H - 1
Atomic mass of O - 16

Now, molar mass = 1(2) + 16

= 2 +16
= 18 u = 18 grams (relative mass in grams)

The compound NacI is an example of a/an

Answers

The compound NaCI is an example of a salt. Salt is formed from a neutralization action of an acid and a base. From the type of reaction itself, we can say that the pH should be neutral or at pH 7.0. No matter what type of acid or base is used.

The compound NaCI is an example of a salt. Salt is formed from a neutralization action of an acid and a base.

In the following reaction: Ca+2 + 2Br- ---> BaBr2, which of the reactants is LEO and which is GER?

Answers

Chemical Reaction : Ca+2 + 2Br- ---- CaBr2
 
  The answer:       LEO is Bromine (Br-1); the oxidation state changes from (0 to -1) and GER is Calcium (Ca+2); the oxidation state changes from (0 to +2).

What type of reaction is shown below? CH4 + 2O2?CO2 + 2H2O + heat

Answers

This is a "Exothermic Reaction."

I did the same test and this was the correct answer.

I hope this helps!

A placebo is a substance that is unlikely to affect the dependent variable. a. True
b. False

Answers

Answer : Option a) True.

Explanation : A placebo is a substance that is unlikely to affect the dependent variable. True as in a clinical trial for any change in the placebo arm is known as the placebo response, and the difference between this placebo response and the result of no treatment is called as the placebo effect. Therefore, a placebo may be given to any person in a clinical context in order to deceive that recipient into thinking that it is an part of active treatment. It actually resembles a drug but is not an actual active drug, so, it is clear that it will not affect dependent variable.
True. A placebo is a substance used to ensure that the independent variable is what is affecting the dependent variable. Usually used in drug trials
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