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kakasveta [241]
3 years ago
12

1. What is the molarity of a solution which contains 0.256 mol of a substance dissolved in 143 mL of solution.

Chemistry
1 answer:
LenaWriter [7]3 years ago
4 0

Answer:

The equation for molarity is moles/liter for the first question you would do 0.256/0.143 liters to get 1.790 mol/L

Explanation:

The second problem you would do need to find the moles of NaCl which you would do by doing 4.89 g/58.44g/mol= 0.08367 then do 0.08367/0.600= 0.139 mol/L

The third problem would be the same steps as the second one.

The fourth problem would be (0.460M)(5.50L)= 2.53 moles

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baherus [9]
Gradual leakage of water stored in hydrate minerals of Earth's<span> rocks could </span>have formed<span> a portion of its water. Water </span>may<span> also </span>have<span> come from volcanism: water vapor in the atmosphere that originated in volcanic eruptions </span>may have<span> condensed to form rain, slowly filling </span>Earth's<span> oceanic basins. So, the answer would be C.

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3 0
3 years ago
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Determine the mass of 5.20 moles of C6H12 (gram-formula mass = 84.2 grams/mole).
SIZIF [17.4K]
5.20 mol C6H12* (84.2 g/mol C6H12)= 4.38*10^(2) g C6H12.

The answer should only have three significant figures, according to the numbers in the problem.

Hope this is helpful~
7 0
3 years ago
Why is it important to study chemical reactions in closed containers
tino4ka555 [31]
Because they could have an explosive reaction and could possibly hurt you

7 0
3 years ago
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When dynamic equilibrium is achieved, the rate of the forward and backward reactions go to zero. (T&amp;F)
ratelena [41]

Answer:

1) False

2) there are equal amounts of rectants and products

Explanation:

1)  When dynamic equilibrium is achieved. the rate of forward and backward reaction they are the same, that is to say, two opposite reactions occur at the same rate, keeping the concentrations constant over time.  Different to say the rate of the ractions go to zero.

2)  A chemical equilibium exists when what is produce in quantities is equal to what reacts.

So the correct answer is the literal (d).

5 0
3 years ago
How does changing the mass of an object affect the density and the object if the volume is kept constant
vivado [14]

Explanation:

mass of an object affect the density and object if the the volume is keep constant.

here we can explain by using the example.

if the mass of an object is 30kg. and volume is 2m3

then density pf given substance is become 15kg/m3

again,

if the mass of the is 40kg/m3 and volume is same

then density is become 20kg/m3 (formula=kg/m3)

here above density and below density is becime different by changing the mass of an object and affect the density and objecy although volume is kept constant or same

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3 years ago
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