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steposvetlana [31]
3 years ago
13

Who was charles darwin

Chemistry
2 answers:
ss7ja [257]3 years ago
7 0
Here are some facts about Charles Darwin:

.Born Feb 12, 1809
.Died April 19, 1882
.He was famous for natural selection
.He was knower as the father of evolution
.Charles Darwin Influenced the Early History of Psychology


Charles Darwin was knower for the theory of evolution about birds and natural selection he did expierment on dead birds because the same birds had a different shape of beak from each other and that's were he came up with the theory of evolution about the birds and their beaks.
Verdich [7]3 years ago
5 0
Charles Darwin was a Geologist, biologist and is best known for his contributions to science of evolution. 
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How many grams of nitric acid HNO₃, are required to neutralize (completely react with) 4.30 grams of Ca(OH)2 according to the ac
Brrunno [24]

Answer:

7.32g of HNO3 are required.

Explanation:

1st) From the balanced reaction we know that 2 moles of HNO3 react with 1 mole of Ca(OH)2 to produce 2 moles of H2O and 1 mole of Ca(NO3)2.

From this, we find that the relation between HNO3 and Ca(OH)2 is that 2 moles of HNO3 react with 1 mole of Ca(OH)2.

2nd) This is the order of the relations that we have to use in the equation to calculate the grams of nitric acid:

• starting with the 4.30 grams of Ca(OH)2.

,

• using the molar mass of Ca(OH)2 (74g/mol).

,

• relation of the 2 moles of HNO3 that react with 1 mole of Ca(OH)2 .

,

• using the molar mass of HNO3 (63.02g/mol).

4.30g\text{ Ca\lparen OH\rparen}_2*\frac{1\text{ mol Ca\lparen OH\rparen}_2}{74g\text{ Ca\lparen OH\rparen}_2}*\frac{2\text{ moles HNO}_3}{1\text{ mole Ca\lparen OH\rparen}_2}*\frac{63.02g\text{ HNO}_3}{1\text{ mole HNO}_3}=7.32g\text{ HNO}_3

So, 7.32g of HNO3 are required.

4 0
1 year ago
Solution A has twice as much solute as solution B is it possible for the solutions to have the same concentration
pishuonlain [190]
Yes. As long as the ratio of solute and solvent is same for both solution, the solution has the same concentration. for example, solution A has 2 ml of water, and 1 ml of sucrose. Solution B has 4ml of water and 2ml of sucrose. Both has a ratio of water to sucrose by 2 : 1. they have the same concentration of 50% sucrose. 
5 0
3 years ago
Cellulose and starch are examples of:
mixer [17]

Answer:

The choose (d)

d. polysaccharides

3 0
3 years ago
Read 2 more answers
What manmade changes to the environment potentially increase the impact of this hazard?
storchak [24]

Answer:

natural disasters

Explanation:

Drought.

Earthquake.

Flash flood.

Hurricane.

Tornado.

Wild fire.

Winter storm.

these are some examples, hope this helps :)

5 0
3 years ago
Read 2 more answers
Carbon dioxide is a colorless odorless gas why is it considered a pollutant?
WARRIOR [948]

Carbon dioxide is a gas having chemical formula CO_{2}, a gas which exhaled by humans and inhaled by plants. It is also emitted from the sources such as cement production and combustion of fossil fuels. It is also known as greenhouse gas associated with acidification of ocean.

Carbon dioxide with other gases acts like a blanket of Earth which absorbs infrared radiations emitted from the sun and thus, preventing the escaping of these rays into the outer space which results in the gradual heating of Earth's surface and atmosphere i.e. increase in temperature of Earth. This process is known as Global Warming.

Hence, carbon dioxide is responsible for the increase in warming of the atmosphere i.e. option (D).



7 0
3 years ago
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