3 years ago

What is the heat required to vaporize 650 grams of a liquid with a heat of vaporization of 723 joules/grams?

1 answer:

3 0

Your answer would be E. 470,000 J

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Luda [366]

No..since research can take different format

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3 years ago

Vikki [24]

Answer:

A. a technique that separates amino acids on the basis of their polarity

Explanation:

8 0

3 years ago

hammer [34]

Answer: B) 46.7% Si and 53.3% O

Explanation:

To calculate the mass percent of element in a given compound, we use the formula:

$\text{Mass percent of element}=\frac{\text{Mass of element}}{\text{total mass}}\times 100\%$

Mass of quartz $(SiO_2)$ = 5.05 g

Mass of silicon = 2.36 g

Mass of oxygen = Mass of quartz $(SiO_2)$ - mass of silicon = 5.05g - 2.36 g = 2.69 g

$\text{Mass percent of silicon}=\frac{\text{Mass of silicon}}{\text{total mass of quartz}}\times 100=\frac{2.36}{5.05}\times 100=46.7\%$

$\text{Mass percent of oxygen}=\frac{\text{Mass of oxygen}}{\text{total mass of quartz}}\times 100=\frac{2.69}{5.05}\times 100=53.3\%$

Thus the percentages of silicon and oxygen in quartz are B) 46.7% Si and 53.3% O

6 0

3 years ago

Harlamova29_29 [7]

Answer:

There are some like Argon, Helium, and Krypton.

Explanation:

Basically any noble gases hope this helps :3

5 0

3 years ago

Lelu [443]

T₁=84 d
t₂=14 d
m₁=4 g

n=t₁/t₂
n=84/14=6

m₂=m₁/2ⁿ

m₂=4/(2⁶)=0.0625 g

0.0625 grams will remain after 84.0 days

3 0

3 years ago