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olga nikolaevna [1]
3 years ago
11

How many calories is 130. joules?

Chemistry
1 answer:
skad [1K]3 years ago
6 0
1 Cal ---------- 4.184 J
? Cal ---------- 130.0 J

130.0 x 1 / 4.184 => 31.07 Cal

hope this helps!


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What is the mass of 2.70 ×10^22 molecules of NaOH (Molar mass = 40.0 g/mol)?
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Data:
Molar Mass of NaOH = 40 g/mol

Solving: <span>According to the Law Avogradro, we have in 1 mole of a substance, 6.02x10²³ atoms/mol or molecules
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6.02*10²³y = 0.270*10²³ 
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\boxed{y \approx 0.04\:mol}


Solving: <span>Find the mass value now
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x = 40*0.04
\boxed{\boxed{x = 1.6\:g}}\end{array}}\qquad\quad\checkmark

Answer:
The mass is 1.6 grams
6 0
3 years ago
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B is the right answer
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Learn more about units conversion: brainly.com/question/13016491

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