CHEMISTRY HIGH SCHOOL

What is the mass of a neutron?

Answers

Answer 1
Answer: 1.008 I am Very sure We just learned this..
Answer 2
Answer: 1.008 amu is the mass of a neutron. 

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Ionic crystals are excellent insulators and can hold a large amount of heat before melting or boiling.TRUE

FALSE

Answers

It is a true fact that ionic crystals are excellent insulators and can hold a large amount of heat before melting or boiling. The correct option among the two options that are given in the question is the first option. Salt is a great example of ionic crystals and we know that it takes a huge amount of time to melt or boil.

Which process can you blame if you burn your finger on a metal utensil sitting in a pot of extremely hot water

Answers

Blame conduction! It is the transfer of heat through direct contact.

The correct answer is conduction

How many grams of oxygen are required to react with 10.0 grams of octane

Answers

are their any choice ?

Given the potential energy diagram for areaction:
Which intervals are affected by the addition of a
catalyst?
(1) 1 and 2
(2) 1 and 3
(3) 2 and 4
(4) 3 and 4

Answers

Intervals 1 and 3 are most affected by the addition of catalyst. Option 2 is correct.

What are catalysts?

Catalysts are those compounds that reduce the activation energy for the reaction to occur, hence increasing the rate of reaction.

Activation energy is the energy that is required to start a reaction. Here, 1 represents the activation energy and 3 represents activation energy without catalyst.

Therefore, intervals 1 and 3 are most affected by the addition of catalyst.

Learn more about Catalyst:

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Answer: Option (2) is the correct answer.

Explanation:

The minimum amount of energy required by the reactants to undergo a reaction is known as activation energy.

And when we add a catalyst into a reaction then it leads to a decrease in activation energy. As a result, product formation becomes faster.

Therefore, we can conclude that intervals 1 and 3 are affected by the addition of a  catalyst.

How could you safely determine if a base is stronger than an acid?

Answers

Combine the two solutions. If the resulting salt is basic, you know the base was stronger. If you end up with an acidic salt, the acid was stronger.

Answer:

B) Use a conductivity apparatus

Explanation:

I got it right on Plato. Strong acids and strong bases will conduct more than weak acids and weak bases, so you can tell if one is stronger than the other by seeing which one conducts more.

In a group assignment, students are required to fill 10 beakers with 0.720 M CaCl2. If the molar mass of CaCl2 is 110.98 g/mol and each beaker must have 250. mL of solution, what mass of CaCl2 would be used?1)3.13 g
2)38.5 g
3)200 g
4)617 g

Answers

200 g is the mass of CaCl_2 would be used. Hence, option C is correct.

Define the molarity of a solution.

Molarity (M) is the amount of a substance in a certain volume of solution. Molarity is defined as the moles of a solute per litres of a solution. Molarity is also known as the molar concentration of a solution.

Total volume = 10 x 0.250 liters = 2.5 liters

M = n ÷ V

Total moles: n = M x V

= 0.720mol/liter  x 2.5 liter

=1.8 mol

Molar mass = grams / n

1.8 mol x 110.98 g/mol

= 199.8 grams

Hence, option C is correct.

Learn more about moles here:

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Total volume = 10*0.250 liters = 2.5 liters
M = n / V (liters)
Total moles: n = M*V = 0.720mol/liter *2.5 liter =1.8 mol

MM = grams / n --> grams = n*MM = 1.8 mol * 110.98 g/mol = 199.8 grams

Answer: option 3) 200 g.
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