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taurus [48]
3 years ago
13

Why did improvements in agriculture lead to the growth of cities?

Chemistry
1 answer:
Marina86 [1]3 years ago
4 0
It strengthened the economy and made more people want to live there so the cities grew
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HALPPPPPP MEH YALL<br> THANKSSSSSS
Ronch [10]

Aye daddy

Lucky thing i just came back xD

Its 78.66 to the nearest sig fig

U can google it 2


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What must be true of a substance with a lot
LUCKY_DIMON [66]

Answer:

A is the answer.

Explanation:

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Which of the following is always involved in a scientific inquiry?​
Oxana [17]

Answer:

I think the answer is coming up with questions based on observations and reasoning

8 0
3 years ago
How many salt and water would you use to prepare 10% salt solution?
tatuchka [14]

Answer:

We can make 10 percent solution by volume or by mass. A 10% of NaCl solution by mass has ten grams of sodium chloride dissolved in 100 ml of solution. Weigh 10g of sodium chloride. Pour it into a graduated cylinder or volumetric flask containing about 80ml of water.

Explanation:

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4 0
2 years ago
What mass of hbr (in g) would you need to dissolve a 3.4 −g pure iron bar on a padlock?
vivado [14]

<u>Given:</u>

Mass of pure iron (Fe) = 3.4 g

<u>To determine:</u>

Mass of HBr needed to dissolve the above iron

<u>Explanation:</u>

Reaction between HBr and Fe is

Fe + 2HBr → FeBr₂ + H₂

Based on the reaction stoichiometry-

1 mole of Fe reacts with 2 moles of HBr

# moles of Fe = mass of Fe/atomic mass of Fe = 3.4/56 g.mol⁻¹ = 0.0607 moles

Therefore # moles of HBr = 2*0.0607 = 0.1214 moles

Molar mass of HBr = 81 g/mole

Mass of HBr = 0.1214 moles * 81 g/mole = 9.83 g

Ans: Mass of HBR required is 9.83 g

5 0
3 years ago
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