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3 years ago

The main difference between strong electrolytes and weak electrolytes is....

Chemistry

1 answer:

Bogdan [553]3 years ago

6 0

Definitely their jawline… just kidding, it’s how much they dissociate

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4.5 moles of carbon monoxide is hoe many grams

Talja [164]

The formula of carbon monoxide is CO. The gram formula mass is 12+16=28. So the gram of 4.5 moles of carbon monoxide is 28*4.5=126 g. The answer is 126 g.

4 0

3 years ago

The atomic number of oxygen is 8. What is the mass number of a oxygen atom with 7 neutrons?.

Pavel [41]

The atomic number of oxygen is 8. The mass number of an oxygen atom with 7 neutrons is 15.

<h3>What is atomic mass?</h3>

Atomic mass is the average mass of the atom. It is measured in atomic mass units, that is Dalton. The mass number is calculated by the number of neutrons and atomic number.

The atomic number is the number of protons present in the atoms. The atomic number of oxygen is 8

The mass number can be calculated by adding those units

atomic number + number of neutrons

Mass number = 8 + 7 = 15

Thus, the mass number of an oxygen atom with 7 neutrons is 15.

To learn more about atomic mass, refer to the link:

brainly.com/question/8101390

#SPJ4

6 0

2 years ago

Propane (C3H3) is used in domestic cooking and heating. A typical home in Pennsylvania burns 750 gal of propane for heating over

k0ka [10]

Answer: There are 32400 moles of propane burned.

Explanation:

To calculate the mass of propane, we use the equation:

$\text{Density of substance}=\frac{\text{Mass of substance}}{\text{Volume of substance}}$

Density of propane = $4.2lb/gal$

Volume of propane = 750 gal

Putting values in above equation, we get:

$4.2lb/gal=\frac{\text{Mass of propane}}{750gal}\\\\\text{Mass of propane}=(4.2lb/gal\times 750gal)=3150lb=1428840g$ (1 lb=453.6 g[/tex]

According to avogadro's law, 1 mole of every substance weighs equal to molecular mass and contains avogadro's number $6.023\times 10^{23}$ of particles.

To calculate the moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}=\frac{1428840g}{44.1g/mol}=32400moles$

Thus there are 32400 moles of propane burned.

6 0

3 years ago

A balloon filled with helium gas occupies 2.50 L at 25°C and 1.00 atm. When released, it rises to an altitude where the temperat

stira [4]

Answer:

8,19 L

Explanation:

The combined gas law is a equation that can be used when the initial and final conditions -pressure,volume,amount of moles,temperature-, of a gas change during a process. It can be written:

$\frac{P1V1}{n1T1}=\frac{P2V2}{n2T2}$

If the amount of the gas remains constant, then n1=n2 and we have:

$\frac{P1V1}{T1}=\frac{P2V2}{T2}$

For the problem we have:

Note: When working with gases is important to use absolute temperature values (°K, °K=°C+273,15):

P1=1 atm, V1=2,5L, T1=25+273,15=298,15°K

P2=0,3 atm, V2=?, T2=20+273,15=293,15°K

$V2=\frac{P1V1T2}{T1P2}=\frac{1atm*2,5L*293,15K}{298,15K*0,3atm}=8,19L$

The new volume of the balloon is 8,19 L.

5 0

3 years ago

What error in the data is likely to occur if the hydrated salt is heated strongly

Lubov Fominskaja [6]

Answer:

If the hydrated salt is overheated, it causes the anhydrous salt to decompose, causing the product to be lost as gas. The reported percentage of water loss will be too high because the gap between the initial measurement and final (which will be lower due to loss of sample) measurement will widen.

4 0

3 years ago