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3 years ago

11

How many types of atoms in this picture?

1 answer:

weqwewe [10]3 years ago

4 0

Answer:

Nitrogen (N), carbon (C), hydrogen (H) and oxygen (O).

Explanation:

Hello,

Given the shown organic compound, we refer to types of atoms to the elements present in the compound, thus, we find nitrogen (N), carbon (C), hydrogen (H) and oxygen (O) that are bonded via single or double bonds in such compound.

Let's remember that compounds like that, having those elements are mainly found in biochemical substances such as proteins, a very important source of benefits for our body.

Regards.

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10. A sample of gas occupies 4.00 L at 80.0 kPa at 303 K. How many moles of gas are in the sample? If the sample weighs 20.50 gr

Lunna [17]

Answer:

Moles: $n=0.127mol$

Molar mass: $M=200.61 g/mol$

Explanation:

Hello,

In this case, we can use the ideal gas equation to compute the moles of the gas sample as shown below:

$PV=nRT\\\\n=\frac{PV}{RT}$

Thus, we should use the pressure in atm as follows:

$n=\frac{80.0kPa*\frac{0.00986923atm}{1kPa}*4.00L}{0.082\frac{atm*L}{mol*K}*303K}\\ \\n=0.127mol$

Moreover, the molar mass is obtained by dividing the given mass by the obtained moles:

$M=\frac{m}{n}=\frac{25.50g}{0.127mol}\\ \\M=200.61 g/mol$

Best regards.

5 0

4 years ago

Ionic compounds and metals usually form what kind of solid

natka813 [3]

Answer:

crystalline

Explanation:

Ionic compounds and metals form crystals.

4 0

3 years ago

Explain how humans acquire the energy to function.Explain the process of cellular respiration and how we obtain this energy.

Naddika [18.5K]

Answer:

energy = heat = producers = consumer animals =

decomposers = heat

Explanation:

this is the best

7 0

3 years ago

4. If the heat of reaction is written on the reactant side of a chemical equation, what does that indicate about the reaction?

Licemer1 [7]

Answer:

B is the correct anwer

Explanation:

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3 years ago

The coefficients that balance the following equation NaCl + MgBr2 →→ MgCl2 + NaBr are

levacccp [35]

I believe the answer is C

6 0

3 years ago