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3 years ago

Do the northern and southern hemisphere experience the day weather? why? or why not?

Chemistry

1 answer:

tamaranim1 [39]3 years ago

7 0

Answer:

yess

Explanation:

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Enter your answer in the provided box. Before arc welding was developed, a displacement reaction involving aluminum and iron(III

Likurg_2 [28]

Answer:

grams of iron = 2262.4 g

Explanation:

The balanced chemical equation should be represented first.

2Al + Fe2O3 → Al2O3 + 2Fe

find the limiting reactants by converting to moles.

covert 1.64 kg to grams = 1640 g

moles = mass/molar mass = 1640/27 = 60.7407407407 moles

60.7407407407 × 1 mol-rxn /2 = 30.37 mol-rxn

The limiting reactant is Fe2O3 Therefore it will determine the yield of Iron

2Al + Fe2O3 → Al2O3 + 2Fe

molar mass of Fe2O3 = 56 × 2 + 16 × 3 = 112 + 48 = 160 g

atomic mass of iron = 56

mass of iron in the reaction = 56 × 2 = 112 g

moles = mass/molar mass

mass = moles × molar mass

mass = 20.2 × 160 = 3232 g

if 160 g of Fe2O3 give 112 g of iron

3232 g of Fe2O3 will give ? grams of iron

grams of iron = 3232 × 112/ 160

grams of iron = 361984 /160

grams of iron = 2262.4 g

7 0

3 years ago

Classify what type of reaction occurred for hydrogen peroxide (there are 5 types you learned): A decomposition reaction occurred

Black_prince [1.1K]

Answer:

A Reaction of decomposition is ocurred to hydrogen peroxide.

Explanation:

Hydrogen peroxide is a molecule that can break down into Hydrogen and Oxygen or decompose very slow under moderate temperature, as you can see in the image below, hydrogen peroxide has a high electronic cloud that makes it a great oxidizer.

6 0

3 years ago

A student observed that a small amount of acetone sprayed on the back of the hand felt very cool compared to a similar amount of

Alla [95]

Answer:

D.) The higher vapor pressure of acetone results in more rapid evaporation and heat loss

Explanation:

Acetone being liquid with very low boiling point and hence can be easily be converted to gaseous state .

And ,

Therefore have higher vapour pressure and as liquid gets converted to gas , the process of evaporation takes place and leads to loss of heat .

Hence , from the given options , the most appropriate option according to given statement of the question is ( d ) .

4 0

4 years ago

Is conductivity a chemical or physical property

MatroZZZ [7]

Answer:

It is a physical property

8 0

3 years ago

Chemosynthesis and photosynthesis are both processes that produce food. <br><br> True or false?

MA_775_DIABLO [31]

Answer:

true

Explanation:

probably true

8 0

3 years ago