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cestrela7 [59]
2 years ago
8

Please help which one is it

Chemistry
2 answers:
creativ13 [48]2 years ago
6 0

Answer:

d:more dense and falls

Explanation:

warm air Rises around cold air bc of its lower density. and when you have a lower density fluid or sum the lower density fluid rises and the higher density falls

kompoz [17]2 years ago
3 0

Answer:

Explanation:

I have the same question

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Answer:

B. 0.92 M

Explanation:

Molarity of a solution = number of moles (n) ÷ volume (V)

According to the information provided in this question;

mass of NaCl = 42g

Volume of water = 780mL

Using mole = mass/molar mass

Molar mass of NaCl = 23 + 35.5 = 58.5g/mol

mole = 42/58.5

mole (n) = 0.72mol

Volume (V) = 780 mL = 780/1000 = 0.780 L

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Molarity = 0.72/0.780

Molarity = 0.923 M

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How many grams of hydrogen gas get produced if 10 g of aluminum reacts?
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There are 1.204 x 10^24 atoms of oxygen. How many moles is this?
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