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DochEvi [55]
3 years ago
7

Which of the following are the requirements when creating a hypothesis for an experiment? Check ALL that apply. A: A hypothesis

is base on knowledge and research. B: A hypothesis is an idea about the solution to a problem. C: A hypothesis is created after an experiment is completed. D: A hypothesis should make a claim about how two factors are related.
Chemistry
2 answers:
ruslelena [56]3 years ago
6 0
The answer is be because a hypothesis is just a educated guess or a theory
kkurt [141]3 years ago
5 0

Answer:

You're answer would be B.

Explanation:

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To calculate the enthalpy change for the reaction, 2CO (g) + O2 (g) Imported Asset 2 CO2 (g), you can use ΔHf0 values for each r
svetoff [14.1K]

Answer:

ΔH0reaction = [ΔHf0 CO2(g)] - [ΔHf0 CO(g) + ΔHf0 O2(g)]

Explanation:

Chemical equation:

CO + O₂   →  CO₂

Balanced chemical equation:

2CO + O₂   →  2CO₂

The standard enthalpy for the formation of CO = -110.5 kj/mol

The standard enthalpy for the formation of O₂  = 0  kj/mol

The standard enthalpy for the formation of CO₂  = -393.5 kj/mol

Now we will put the values in equation:

ΔH0reaction = [ΔHf0 CO2(g)] - [ΔHf0 CO(g) + ΔHf0 O2(g)]

ΔH0reaction = [-393.5 kj/mol] - [-110.5 kj/mol + 0]

ΔH0reaction = [-393.5 kj/mol] - [-110.5 kj/mol]

ΔH0reaction = -283 kj/mol

7 0
2 years ago
Select the statements that correctly describe the term viscosity. a.The viscosity of each substance is a constant value that wil
KatRina [158]

Answer:

D. VISCOSITY can be defined as a substance's ability to resist flow.

Explanation:

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3 years ago
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