3 years ago

Please help! BRAINLIEST to right answer

Chemistry

1 answer:

Anastasy [175]3 years ago

5 0

Answer:

Hailey the answer is D.

Explanation:

if liquid to solid is exothermic then then the other way around would be endorhermic

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An object has a mass of 20 kg and a volume of 5 mL. What is the object's density?

e-lub [12.9K]

Good grief, this stuff got caught in a black hole somewhere. It is terribly dense.
1 mL = 1 cc under normal conditions.

d = mass / volume
m = 20 kg
v = 5 mL

d = 20kg / 5 mL
d = 4 kg / mL
d = 4 kg / cc

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4 years ago

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From the following heats of reaction,

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Answer:+178

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3 years ago

How many significant figures are in 0.07080 g?

goldenfox [79]

There are 4 significant figures.
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1) Complete the symbol equation by adding the missing product: C7H16 -> C3H8 + ____

Dafna11 [192]

Answer: 1) $C_7H_{16}\rightarrow C_3H_8+C_4H_{8}$

2) $C_{10}H_{22}\rightarrow C_5H_{10}+C_5H_{12}$

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According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

The process of converting long chain hydrocarbons are broken into smaller hydrocarbons is called as cracking.

1) $C_7H_{16}\rightarrow C_3H_8+C_4H_{8}$

2) $C_{10}H_{22}\rightarrow C_5H_{10}+C_5H_{12}$

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3 years ago

What mass in grams of glucose can be produced from a photosynthesis reaction that occurs using 10 mol co2?

LenKa [72]

Answer: 300 g C6H12O6

Explanation: Solution attached.

The mole to mole ratio between CO2 and glucose is 6 moles CO2 to 1 mole C6H12O6 based on the balanced equation.

6CO2 + 6H2O -> C6H12O6 + 6 O2

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3 years ago