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3 years ago

10

To measure a specific volume of a gas, you must have a(n)

2 answers:

Alisiya [41]3 years ago

6 0

A gas is free flowing in any direction. It will fill any volume that surrounds it. Therefore, the answer is c because of the container was open, the gas would flow out and me immeasurable.

hoa [83]3 years ago

4 0

Answer:

The correct answer is option c.

Explanation:

Gas is example of fluid.

Fluid is a freely flowing substance with no definite shape. They can be easily changed. Other examples of fluid are water, oil etc.

To measure the specific volume of the gas we must have a container along with the lid to seal the gas inside the container. If not sealed the gas will flow out of the container and that will result recording of incorrect values for specific volume of gas.

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No. Of particles in H2SO4 in which 8grams oxygen is present????

steposvetlana [31]

Answer:

7?

Explanation:

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2 years ago

Acetone is one of the most important solvents in organic chemistry. It is used to dissolve everything from fats and waxes to air

Yanka [14]

Answer: a. 79.6 s

b. 44.3 s

c. 191 s

Explanation:

Expression for rate law for first order kinetics is given by:

$t=\frac{2.303}{k}\log\frac{a}{a-x}$

where,

k = rate constant

t = age of sample

a = let initial amount of the reactant

a - x = amount left after decay process

a) for completion of half life:

Half life is the amount of time taken by a radioactive material to decay to half of its original value.

$t_{\frac{1}{2}}=\frac{0.693}{k}$

$t_{\frac{1}{2}}=\frac{0.693}{8.7\times 10^{-3}s^{-1}}=79.6s$

b) for completion of 32% of reaction

$t=\frac{2.303}{k}\log\frac{100}{100-32}$

$t=\frac{2.303}{8.7\times 10^{-3}}\log\frac{100}{68}$

$t=44.3s$

c) for completion of 81 % of reaction

$t=\frac{2.303}{k}\log\frac{100}{100-81}$

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$t=191s$

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2 years ago

A- is a weak base. which equilibrium corresponds to the equilibrium constant ka for ha?

vekshin1

Answer:

$K_a=\frac{[H^+][A^-]}{[HA]}$

Explanation:

ka is defined as the dissociation constant of an acid. It is defined as the ratio of concentration of products to the concentration of reactants.

For the dissociation of weak acid, the chemical equation follows:

$HA\rightleftharpoons H^++A^-$

The equilibrium constant is defined by the equilibrium concentration of products over reactants:

$K_a=\frac{[H^+][A^-]}{[HA]}$

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Explanation:

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