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Anni [7]
3 years ago
6

I need help with question 39 please

Chemistry
1 answer:
Naddik [55]3 years ago
8 0

Answer:

ii

Explanation:

ii

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What is the mass of oxygen in 300 grams of carbonic acid (H2CO3)
DENIUS [597]

mass of carbonic acid = 300g

molar mass of H2CO3 = 2H + C + 3 O

= 2 x 1.008+ 12.01 + 3 x  16

= 62.03g/mol


moles of H2CO3 = mass/Molar mass

= 300/62.03

= 4.8364 moles


1 mole H2CO3 has 3 moles Oxygen


4.8364 moles H2CO3 contains  

=   3 x 4.8364  moles Oxygen  =   14.509 moles Oxygen


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mass of oxygen in 300g of carbonic acid(H2CO3) = 232.15g

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3 years ago
Which types of reactions would result in the formation of precipitate?
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Answer:

Double Displacement Reaction

Explanation:

A double displacement reaction is a type of chemical reaction in which the reactant ions exchange places to form new products. Usually, a double displacement reaction results in precipitate formation.

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If an area has high air pressure and low humidity, what type of weather will it most likely have?
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Aloha~! My name is Zalgo and I am here to help you out today. Those sort of conditions could be fore-boding/foreshadowing/warning that there will soon be a storm or that it will rain quite a lot. In the case of it being a storm, you should be a small room where there are no windows and nothing that is small that will fly towards you that could kill you.

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The article is on newsela called the water cycle
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Answer:

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3 years ago
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