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2 years ago

An example of energy conversion from kinetic to thermal energy would be

Chemistry

1 answer:

Sergeu [11.5K]2 years ago

3 0

Dropping a water balloon on the ground

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A solution contains 0.775 g Ca2 0.775 g Ca2 in enough water to make a 1925 mL1925 mL solution. What is the milliequivalents of C

Romashka [77]

Answer: There will be 0.00002 meq per Liter of the solution.

Explanation:

Normality is defined as the umber of gram equivalents dissolved per liter of the solution.

$Normality=\frac{\text{no of gram equivalents} \times 1000}{\text{Volume in ml}}$

$Normality=\frac{\text{given mass}\times 1000}{\text {Equivalent mass}\times {\text{Volume in ml}}}$

Equivalent weight is calculated by dividing the molecular weight by n factor. ${\text{Equivalent weight}}=\frac{\text{Molecular weight}}{n}$

n= charge for charged species , For $Ca^{2+}$ , n =2

${\text{Equivalent weight}}=\frac{40}{2}=20g$

$\text{no of gram equivalents}=\frac{0.775g}{20g/mol}=0.04gramequivalents$

$Normality=\frac{0.04\times 1000}{1925}=0.02eq/L=0.00002meq/L$

Thus there will be 0.00002 meq per Liter of the solution.

3 0

3 years ago

A sample of an unknown compound is vaporized at 180.°C. The gas produced has a volume of 2010.mL at a pressure of 1.00atm, and i

stiv31 [10]

Answer: The molar mass of the given unknown compound is 50.5 g/mol.

Explanation:

To calculate the volume of water, we use the equation given by ideal gas, which is:

$PV=nRT$

or,

$PV=\frac{m}{M}RT$

where,

P = pressure of sample = 1.00 atm

V = volume of sample = 2010 mL = 2.010 L (Conversion factor: 1 L = 1000 mL)

m = Given mass of unknown compound = 2.73 g

M = Molar mass of unknown compound = ? g/mol

R = Gas constant = $0.0820\text{ L atm }mol^{-1}K^{-1}$

T = temperature of sample = $180^oC=[180+273]K=453K$

Putting values in above equation, we get:

$1.00atm\times 2.010L=\frac{2.73g}{M}\times 0.0820\text{ L atm }mol^{-1}K^{-1}\times 453K\\\\V=50.45g/mol$

Rounding off to 3 significant figures, we get the molar mass to be 50.5 g/mol.

Hence, the molar mass of the given unknown compound is 50.5 g/mol.

8 0

2 years ago

The equator is an imaginary line of what on earth (latitude or longitude)

Debora [2.8K]

Answer:

The Equator is an imaginary line perpendicular to this axis. It is equidistant from the North and South Poles, and divides the globe into the Northern Hemisphere and the Southern Hemisphere.

4 0

3 years ago

Read 2 more answers

What would happen if you put a balloon on earth And brought it to the moon with lower atmospheric pressure it would do what?

Alexandra [31]

Answer:

I think it's 1

Explanation:

As the balloon rises the gas inside the balloon expands because the pressure surounding the balloon drops.

4 0

2 years ago

Please help me ASAP I’ll mark Brainly

xenn [34]

Answer:

yes i knowthis is a gret que

4 0

2 years ago