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3 years ago

Question 6

Chemistry

1 answer:

ss7ja [257]3 years ago

3 0

Answer:

He is probably studying <u>Geomorphology. </u>

Explanation:

Geology is the science that studies the composition, structure, dynamics, and history of planet Earth, the processes by which it has evolved including everything that has to do with its natural resources and with this the processes that affect the surface, and therefore, the environment.

Geomorphology is a branch of geosciences, more specifically geography and geology. One of his most interesting models explains the ways in which the earth's surface is the result of a consistent dynamic balance.

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Inorganic compounds which are found in the earth are called

saul85 [17]

Answer: The answer would be minerals. Synthetics are made by men, and shouldn't be found in the earth Vitamins are organic Cement is a mixture of an organic compounds and rarely found in nature.

6 0

3 years ago

3. What is an element?

laila [671]

Answer:

copper

Explanation:

it's on the periodic table of elements

7 0

3 years ago

Read 2 more answers

A certain compound contains 4.0 g of calcium and 7.1 g of chlorine. Its relative molecular mass is 111. Find its empirical and m

Phantasy [73]

Given :

A certain compound contains 4.0 g of calcium and 7.1 g of chlorine.

Its relative molecular mass is 111.

To Find :

Its empirical and molecular formulas.

Solution :

Moles of calcium , $n_1=\dfrac{4}{40}=0.1\ moles$ .

Moles of chlorine , $n_2=\dfrac{7.1}{35.45}=0.2\ moles$ .

The ratio calcium and chlorine is 1 : 2 .

So , the empirical formula is $CaCl_2$ .

Now , molecular mass of $CaCl_2$ is :

$M=40+(2\times 35.45)\\\\M=110.9\ g$

So , $n=\dfrac{111}{110.9} \approx1$

Therefore , the molecular formula is also $CaCl_2$ .

Hence , this is the required solution .

7 0

3 years ago

How many moles of oxygen atoms are present in 30.5 grams of hydrogen peroxide (h2o2)?

Pepsi [2]

1.8 moles of oxygen atoms are present in 30.5 grams of hydrogen peroxide.

<u>Explanation:</u>

First we have to convert the given weight of hydrogen peroxide to molar mass of hydrogen peroxide. So for this, we have to divide the given weight with the molecular mass of hydrogen peroxide.

$\text {Molecular mass of } \mathrm{H}_{2} \mathrm{O}_{2}=(2 \times 1)+(2 \times 16)=2+32=34 \mathrm{g}$

So,

$\text {Molar mass of } \mathrm{H}_{2} \mathrm{O}_{2}=\frac{30.5}{34}=0.90 \text { moles of } \mathrm{H}_{2} \mathrm{O}_{2}$

Second step, in this moles, 2 molecules of oxygen are present. Thus 1 mole of Hydrogen peroxide consists of 2 moles of oxygen. Then,

$0.90 moles of $\mathrm{H}_{2} \mathrm{O}_{2}=2 \times 0.90=1.8$ moles of oxygen$

So, 30.5 grams of hydrogen peroxide consists of 1.8 moles of oxygen.

4 0

3 years ago

I need help with #2 and #4 please

Arte-miy333 [17]

For #4 is 298.48 hope it is correct

4 0

3 years ago