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3 years ago

The mixture which contains elements only is (a) air (b) brass (c) mineral water (d) seawater

Chemistry

2 answers:

Olin [163]3 years ago

6 0

Answer:

Air is an great example of elemental mixture.

Sholpan [36]3 years ago

4 0

Answer:

So yes! A mixture can contain just elements if those elements are not chemically reactive to one another. Air is a great example of an elemental mixture as it contains nitrogen, oxygen, and argon (along with some other compounds).

Explanation:

hope this helps you :)

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Help please bjfkboweugfowbs

Anit [1.1K]

Answer:

B is correct answer because The enthalpy is negative so this means the reaction produces heat and the reaction is exothermic

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3 years ago

If an atom of tin has a mass number of 118 and an atomic number of 50, how many electrons does it have? 50 168 118 68

Ksju [112]

There are 50 electrons

8 0

3 years ago

Read 2 more answers

Concerning Boyle's Law, if you had a gas at a pressure of 101 kPa and decreased the volume of the container holding the gas to o

Viefleur [7K]

Answer:

$P_2=404 kPa$

Explanation:

Hello,

In this case, the Boyle's is mathematically defined via:

$P_1V_1=P_2V_2$

Which stands for an inversely proportional relationship between volume and pressure, it means the higher the volume the lower the pressure and vice versa. In such a way, since the volume is decreased to one quarter, we can write:

$V_2=\frac{1}{4} V_1$

We can compute the new pressure:

$P_2=\frac{P_1V_1}{V_2} =\frac{P_1V_1}{\frac{1}{4} V_1} =\frac{101kPa*V_1}{\frac{1}{4} V_1} \\\\P_2=4*101kPa\\\\\\P_2=404 kPa$

Which means the pressure is increased by a factor of four.

Regards.

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3 years ago

What is the molar mass of CH4 (C=12.011 amu H = 1.008 amu)

never [62]

Answer:

16.05 amu

Explanation:

12.011 rounds to about 12.01 and 1.008 rounds to about 1.01 so when adding you'd do [12.01 + (1.01×4)]= 16.05

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3 years ago

How many neutrons does element X have if its atomic number is 24 and its mass number is 90?

kondor19780726 [428]

The number of neutrons does element X have if its atomic number is 24 and its mass number is 90 is 24.

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3 years ago