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Allushta [10]
3 years ago
6

What is the mass of a sample of water that takes 2000 kJ of energy to boil into steam at 373 K. The latent heat of vaporization

of water is 2.25 x 10^6 J kg-1.
Chemistry
1 answer:
zzz [600]3 years ago
5 0

Answer:

\boxed{\text{889 g}}

Explanation:

The formula relating the mass m of a sample and the heat q to vaporize it is

q = mL, where L is the latent heat of vaporization.

\begin{array}{rcl}2000 \times 10^{3} \text{ J} & = & m \times \dfrac{2.25 \times 10^{6} \text{ J}}{\text{1 kg}}\\\\m & = & \dfrac{2000 \times \times 10^{3}\text{ kg}}{2.25 \times 10^{6}}\\ & = & \text{0.889 kg}\\\\ & = & \text{889 g}\\\end{array}\\\text{The mass of water is $\boxed{\textbf{889 g}}$}

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5.25 x 10^32 atoms of K to grams
NNADVOKAT [17]

Answer:

3.40x10¹⁰ grams

Explanation:

First we<u> convert 5.25x10³² atoms to moles</u>, using <em>Avogadro's number</em>:

5.25x10³² atoms ÷ 6.023x10²³ atoms/mol = 88.72x10⁸ mol

Then we<u> convert K moles to grams</u>, using its <em>molar mass</em>:

88.72x10⁸ mol * 39 g/mol = 3.40x10¹⁰ g

So 5.25x10³² atoms of K would weigh 3.40x10¹⁰ grams.

3 0
3 years ago
I need help with this question I don’t understand it can someone help me? I’m lost
nirvana33 [79]

Answer:

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Explanation:

5 0
3 years ago
When naming ionic compounds does the roman numeral after the metal cation tell you how many anions will be there?
murzikaleks [220]

Answer:

no

Explanation:

the roman numeral tells you that the metal is a transition metals. transition metals have more than one oxidation state.

8 0
3 years ago
What is the pH of soil ?​
Vesna [10]

Answer:

Most soils have pH values between 3.5 and 10. In higher rainfall areas the natural pH of soils typically ranges from 5 to 7, while in drier areas the range is 6.5 to 9. Soils can be classified according to their pH value: 6.5 to 7.5—neutral

Explanation:

hope this helps if not let me know have a great day

3 0
2 years ago
What are the 4 different types of bonds and how are they formed?
miv72 [106K]

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Covalent is followed by ionic, hydrogen, and van der Waals.

To know more about 4 different types of bonds, visit;

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8 0
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