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3 years ago

15

A compound has a low melting point, is not soluble in water, and doesn't conduct electricity when in solution. The sample is mos

t likely:
A:
VO2
В:
CF4
C:
MgBr2
D:
not enough information

1 answer:

Fudgin [204]3 years ago

6 0

Answer: cf4

Explanation: trust me

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A 5.2 molal aqueous solution of methyl alcohol, CH3OH, is supplied. What is the mole fraction of methyl alcohol in the solution?

telo118 [61]

Answer:

0.086

Explanation:

A 5.2 molal aqueous solution of methyl alcohol indicates that 5.2 moles of methyl alcohol are present in 1 kilogram (or 1000 g) of water. Water has a molecular weight of 18 g/mol.

(100g)/18g/mol=55.56 mol

5.2 mol/(5.2mol+55.56 mol)=0.086

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2 years ago

What is the electron configuration for N (nitrogen)?

ollegr [7]

Answer:

$1s^22s^22p^3$

Explanation:

Nitrogen has the atomic number = 7

So, No. of electrons = 7

<u><em>Electronic Configuration:</em></u>

$1s^22s^22p^3$

<u>Remember that:</u>

s sub shell holds upto 2 electrons while p sub shell upto 6

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3 years ago

The temperature is -14°C the air pressure in an automobile tire is 149K PA if the volume does not change what is the pressure af

Jet001 [13]

Answer: The pressure after the tire is heated to 17.3°C is 167 kPa

Explanation:

To calculate the final temperature of the system, we use the equation given by Gay-Lussac Law. This law states that pressure of the gas is directly proportional to the temperature of the gas at constant pressure.

Mathematically,

$\frac{P_1}{T_1}=\frac{P_2}{T_2}$

where,

$P_1\text{ and }T_1$ are the initial pressure and temperature of the gas.

$P_2\text{ and }T_2$ are the final pressure and temperature of the gas.

We are given:

$P_1=149kPa\\T_1=-14^0C=(273-14)=259K\\P_2=?=27.5psi\\T_2=17.3^0C=(273+17.3)=290.3K$

Putting values in above equation, we get:

$\frac{149}{259}=\frac{P_2}{290.3}\\\\P_2=167kPa$

Hence, the pressure after the tire is heated to 17.3°C is 167 kPa

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4 years ago

What caused the bonding of two atoms which undergo an ionic bond?

kondaur [170]

<span>Since one is negative and one is positive they are held together by their electrostatic attraction to each other, much like how a north and south pole of a magnet attract.</span>

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3 years ago

Read 2 more answers

The measurement 0.0002833g has how many significant figures?

kherson [118]

Answer:

There are seven significant figures

Explanation:

There are seven different digits within the number. Three 0s, one 2, one 8, and two 3s, adding up to seven different numbers. You exclude the first 0 when the number is a decimal, leaving seven significant figures. Hope this makes sense! :)

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3 years ago