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IgorC [24]
3 years ago
8

One mole of aluminum atoms has a mass of 27 grams. How many grams are in 9.0 moles of aluminum?

Chemistry
1 answer:
gizmo_the_mogwai [7]3 years ago
6 0
27*9=243 if one mole is equal to 27 grams times that by 9
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How many grams would 3.36 × 1023 molecules of copper (II) sulfate (CuSO4) weigh?
Semenov [28]
Molar mass ( CuSO₄) = 159.609 g/mol

159.609 g ----------------- 6.02 x 10²³ molecules
         ? g ------------------ 3.36 x 10²³ molecules

mass = ( 3.36 x10²³) x 159.609 / 6.02 x 10²³

mass = 5.36 x 10²⁴ / 6.02 x 10²³

mass = 8.90 g 

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a sample of water with a mass of 648.00 kg at 298 K is heated with 87 kh of energy. the specific heat of water is 1 J-1 kg K-1.
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q = mCΔT

The correct specific heat capacity of water is <em>4.187 kJ/(kg.K)</em>.

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3 years ago
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Unit 1- Unit Assessment (Matter &amp; Density)
konstantin123 [22]

Answer:

<h3>The answer is 11 g/mL</h3>

Explanation:

The density of a substance can be found by using the formula

density =  \frac{mass}{volume} \\

From the question

mass = 3025 g

volume = 275 mL

We have

density =  \frac{3025}{275}  \\

We have the final answer as

<h3>11 g/mL</h3>

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7 0
3 years ago
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vekshin1
<h2>Answer : Option C) Joseph is observing the color of the reaction mixture to see whether proteins are present in the given solution.</h2><h3>Explanation :</h3>

An example of qualitative observation is the one where one uses the five senses to identify the changes in the reaction.

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Usually qualitative observations are those which can be easily predicted by using five senses.


5 0
3 years ago
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