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2 years ago

The results of an experiment is the:

Chemistry

2 answers:

mixas84 [53]2 years ago

7 0

Answer:

investing money in the ratio 3:2. After 6 months, they made a profit of 350,000. Anil wanted to share the money equally. Ashok felt he should get 30,000 and Anil should get 320,000.

just olya [345]2 years ago

4 0

Dependent variable.

the dependent variable is the outcome of the expirament

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Radio stations identify themselves by their position on the radio dial such as 90.1 and 93.3. This number is based on the number

netineya [11]

D. frequency is the answer

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3 years ago

What is the percent ionization of a 1.8 M HC2H3O2 solution (Ka = 1.8 10-5 ) at 25°C?

xz_007 [3.2K]

Answer:

B) 0.32 %

Explanation:

Given that:

$K_{a}=1.8\times 10^{-5}$

Concentration = 1.8 M

Considering the ICE table for the dissociation of acid as:-

$\begin{matrix}&CH_3COOH&\rightleftharpoons &CH_3COOH&+&H^+\\ At\ time, t = 0 &1.8&&0&&0\\At\ time, t=t_{eq}&-x&&+x&&+x\\ ----------------&-----&-&-----&-&-----\\Concentration\ at\ equilibrium:-&1.8-x&&x&&x\end{matrix}$

The expression for dissociation constant of acid is:

$K_{a}=\frac {\left [ H^{+} \right ]\left [ {CH_3COO}^- \right ]}{[CH_3COOH]}$

$1.8\times 10^{-5}=\frac{x^2}{1.8-x}$

$1.8\left(1.8-x\right)=100000x^2$

Solving for x, we get:

x = 0.00568 M

Percentage ionization = $\frac{0.00568}{1.8}\times 100=0.32 \%$

Option B is correct.

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3 years ago

Clary ran 20 miles in four hours. What was her average speed?

Nady [450]

5 miles per hour

20/4=5

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3 years ago

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Which process will change a substance chemically? A. boiling B. melting C. burning D. evaporating

marshall27 [118]

The answer is B. boiling

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3 years ago

Wich statement correctly relates science and its influence on society

Rudiy27

The statement that correctly relates science and its influence on society is : Science can be used to address societal problems, but it is not always successful

for example, science can be used to address food shortage. Through various biotechnology, society doesn't have to be worry about food shortage in the future

hope this helps

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3 years ago

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