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Svetllana [295]
3 years ago
7

PLS HELP I GIVE BRANLIEST !!!

Chemistry
1 answer:
yarga [219]3 years ago
6 0

Explanation:

D. The total mass of the reactants equals the total mass of the

products.

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True or False - when setting up your conversion problems every numerical value must have a unit on it.
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Answer:

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What is the molar mass of KCI
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Answer:

178.01347 ± 0.00093 g/mol

Explanation:

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3 years ago
If I have an unknown quantity of gas at a pressure of 380 mmHg, a volume of 25 L, and a temperature of
Bess [88]

Answer:

                     0.5077 moles

Explanation:

Data Given:

                Moles  =  n  =  <u>???</u>

                Temperature  =  T  =  300 K

                 Pressure  =  P  =  380 mmHg = 0.50 atm

                 Volume  =  V  =  25 L

Formula Used:

Let's assume that the hydrogen gas in balloon is acting as an Ideal gas, the according to Ideal Gas Equation,

                 P V  =  n R T

where;  R  =  Universal Gas Constant  =  0.082057 atm.L.mol⁻¹.K⁻¹

Solving Equation for n,

                 n  =  P V / RT

Putting Values,

                 n  =  (0.50 atm × 25 L) / (0.082057 atm.L.mol⁻¹.K⁻¹ × 300 K)

                 n  = 0.5077 moles

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3 years ago
If snails and crayfish die, what happens to the other species?
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Crayfish are very intolerant of pollution and other human-generated fouling of their environment. ... This abundance may be due more to the acid-generated absence of fish which prey on crayfish than to a direct, positive influence of the acid on the crayfish itself.
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3 years ago
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