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kati45 [8]
3 years ago
9

Please help me in this question?

Chemistry
1 answer:
gavmur [86]3 years ago
6 0

The answer is B

Explanation:

Can you mark brainliest I correct

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In order to expand agriculture and urban areas to meet increased demand for growing populations, water supplies often have to be
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Answer:

Decrease occur in the amount and flow of water bodies.

Explanation:

There is decrease in the amount and flow of water from water bodies such as rivers and lakes etc occur when the river is diverted from large water bodies because the water flows to the diverted sides and decrease occurs in the amount of water in the rivers and lakes. Those regions from where this river passes can also be negatively affected due to low amount of water they receives for their daily needs or for cultivation of crops so we can say that this diversion has adverse effect on other populations.

4 0
3 years ago
What do the noble gases have in common with the halogens? Both noble gases and halogens are
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The halogens and noble gases are alike because they are all non-metallic elements, with the exception of astatine, a radioactive
5 0
2 years ago
A geologist is attempting to date a layer of sedimentary rock. He performs radioactive dating using uranium-235, which has a hal
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2.11 billion years.

Explanation:

I hope this helps! Have a great rest of your day!

4 0
3 years ago
Read 2 more answers
Pls help me with my chemistry finals test.
Nutka1998 [239]
What do you need help with? Can you specify?
3 0
2 years ago
How many grams of NaOH are produced from 20.0 grams of Na2CO3?
natita [175]

Answer:

Hope this helps!

Explanation:

Ans: 15.1 grams

Given reaction:

Na2CO3 + Ca(OH)2 → 2NaOH + CaCO3

Mass of Na2CO3 = 20.0 g

Molar mass of Na2CO3 = 105.985 g/mol

# moles of Na2CO3 = 20/105.985 = 0.1887 moles

Based on the reaction stoichiometry: 1 mole of Na2CO3 produces 2 moles of NaOH

# moles of NaOH produced = 0.1887*2 = 0.3774 moles

Molar mass of NaOH = 22.989 + 15.999 + 1.008 = 39.996 g/mol

Mass of NaOH produced = 0.3774*39.996 = 15.09 grams

4 0
3 years ago
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