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Galina-37 [17]
3 years ago
6

Need help on this question asap pleasee I would really appreciate it

Chemistry
1 answer:
Elza [17]3 years ago
6 0

Answer:

See Explanation

Explanation:

An endothermic reaction is one in which energy is absorbed and the change in enthalpy for the reaction is positive.

If we look at the reaction 2HgO + 45kcal ----> 2Hg + O2; we will notice that

i) 45kcal of energy was taken in (absorbed) for the reaction to occur

ii) The value of the reaction enthalpy is positive

For these two reasons, the reaction is an endothermic reaction as written.

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How many grams of naoh do you need to make 1 liter of a 10% sodium hydroxide solution?
frez [133]

Mass % of NaOH solution = 10 % (m/v)

Mass of NaOH required to prepare 1 L solution:

1 L solution * \frac{1000 mL}{1L} *\frac{10 g NaOH}{100 mL solution}

= 100 g NaOH

7 0
4 years ago
Match each molecular formula to the corresponding empirical formula.
lawyer [7]

Explanation:

C₄H₈O₂                      C₂H₄O

C₄H₁₂O₄                       CH₃O

C₂H₁₀O₂                      CH₅O

The empirical formula is that which expresses the composition of a compound in the simplest whole number ratio of the atoms of the different elements that makes up a compound.

The molecular formula is the true formula of the compound. It expresses the actual number of moles of atoms of the different elements present in a molecule of the compound.

C₄H₈O₂                      C₂H₄O

4: 8 : 2 divided by 2 gives 2: 4 : 1

C₄H₁₂O₄                       CH₃O

4: 12: 4  divided by 3 gives 1: 3: 1

C₂H₁₀O₂                      CH₅O

2: 10: 2 divided by 2 gives 1: 5: 1

learn more:

Empirical formula brainly.com/question/2774727

#learnwithBrainly

5 0
4 years ago
Help me anyone . Im confused show me step by step!
Eduardwww [97]
I'm not very good at chemistry, but I would say 158.56. I may be wrong, answer at your own risk.
3 0
4 years ago
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In most cases, reactant-favored reactions have:​
vekshin1

Answer:

Have negitive values

Explanation:

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3 years ago
When butane burns in oxygen, it produces carbon dioxide and water. This reaction is represented in this equation: 2C4H10 + 13O2
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This equation is balanced because there are 8 atoms of carbon (C), 26 atoms of oxygen (O), and 20 atoms of hydrogen (H) on each side of the equation.
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