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BlackZzzverrR [31]
3 years ago
12

Groundwater supplies can be easily contaminated by surface mining of coal All BUT ONE may be how surface mining might

Chemistry
1 answer:
Ludmilka [50]3 years ago
3 0

Answer:

The answer is B.

Explanation:

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What is the another another name of lithium carbonate​
sveta [45]

Answer:

Lithium carbonate

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3 0
3 years ago
Please I really really need help!!!!
Zigmanuir [339]

Answer:

1) It is the number of particles in one mole of substance. It is an arbitrary definition to denote an amount of substance, not by its weight but by its number of molecules. Why? because that is convenient when doing certain calculations involving molecule formulas.

2) 1 mole of substance contains exactly as many particles as there are atoms  in 12 grams of carbon-12.

3) The unified atomic mass unit is 1/12 of the mass of 1 carbon-12 atom.

So you see all three concepts are linked together.

4 0
3 years ago
A chemist adds of a sodium thiosulfate solution to a reaction flask. Calculate the mass in grams of sodium thiosulfate the chemi
schepotkina [342]

This is a incomplete question.The complete question is:

A chemist adds 180.0 ml of a 1.77 mol/L of sodium thiosulfate solution to a reaction flask. Calculate the mass in grams of sodium thiosulfate the chemist has added to the flask. Be sure your answer has the correct number of significant digits.

Answer: 50.4 g

Explanation:

To calculate the number of moles for given molarity, we use the equation:

\text{Moles of solute}={\text{Molarity of the solution}}\times{\text{Volume of solution (in L)}}     .....(1)

Molarity of sodium thiosulfate solution = 1.77 M

Volume of sodium thiosulfate solution = 180.0 mL = 0.1800 L

Putting values in equation 1, we get:

\text{Moles of sodium thiosulfate}={1.77}\times{0.1800}=0.319moles

Mass of sodium thiosulfate = moles\times {\text {Molar mass}}=0.319moles\times 158.11g/mol=50.4g

Thus 50.4 g of sodium thiosulfate the chemist has added to the flask.

6 0
3 years ago
The stationary state with the lowest energy is called the _______.
Olegator [25]

Answer:

Ground state

the state with the smallest amount of energy.

3 0
3 years ago
He henry's law constant of oxygen in water at 25 °c is 773 atm mol-1kg h2o. calculate the molality of oxygen in water under a p
motikmotik
Henry law:

P = KC
P = solvent vapour pressure
K = Henry constant 
C = conc of solute

So,   0.2 = 773 C
so, C =  0.2 / 773 =   2.5 x 10^{-4} molal
4 0
3 years ago
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