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3 years ago

A substance has a mass of 23.7g and a volume of 7.9ml. The density of the object is

Chemistry

1 answer:

Nataly [62]3 years ago

4 0

Answer:

3 grams per millliter

Explanation:

$\rho=\dfrac{m}{V} \\\\\\\rho=\dfrac{23.7g}{7.9mL}=3g/mL$

Hope this helps!

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Calculate the energy (in kJ) required to heat 10.1 g of liquid water from 55 oC to 100 oC and change it to steam at 100 oC. The

Maksim231197 [3]

Answer:

$\large\boxed{\large\boxed{24.6kJ}}$

Explanation:

<u>1. Energy to heat the liquid water from 55ºC to 100ºC</u>

$Q=m\times C\times \Delta T$

m = 10.1g

C = 4.18g/JºC

ΔT = 100ºC - 55ºC = 45ºC

$Q=10.1g\times 4.18J/g\ºC\times 45\ºC=1,899.81J$

<u>2. Energy to change the liquid to steam at 100ºC</u>

$L=\lambda \times n$

λ = 40.6kJ/mol

n = 10.1g / 18.015g/mol = 0.5606mol

$L=40.6kJ/mol\times 0.5604mol=22.76214kJ=22,762.14J$

<u>3. Total energy</u>

$1,899.81J+22,762.14J=24,661.95J\approx24,662J\approx24.6kJ$

7 0

3 years ago

Which of the following is evidence that groundwater cause erosion and deposition

defon

Answer:You didn't provide examples

Explanation: Groundwater can cause erosion under the surface as it moves through the soil. During the movement an acid is formed which what causes erosion and deposition.

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4 0

2 years ago

(GIVING BRAINLIEST) do what the following image says.

S_A_V [24]

Answer:

hope it helps.

<h3>stay safe healthy and happy.<u>.</u><u>.</u></h3>

7 0

3 years ago

Read 2 more answers

How many feet are there in58 yards ?<br>

iragen [17]

<h2><u>PLEASE MARK BRAINLIEST!</u></h2>

Answer:

To find how many feet their are in 58 yards, you have to multiply 58 yards by 3, because their are 3 ft per yard.

Explanation:

58 * 3 = ?

58 * 3 = 174 feet

Your answer is 174 feet.

I hope this helps!

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3 years ago

What is the correct name for: C3S5?

scZoUnD [109]

Answer:

Trithioxodithiole

Explanation:

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3 years ago