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3 years ago

In science what can only be separated by Chemical methods

Chemistry

1 answer:

PilotLPTM [1.2K]3 years ago

5 0

Answer:

A mixture is a physical combination of substances thus it only requires physical processes to separate.

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3 years ago

What are the most enzymes in the body?

Alex787 [66]

Examples of specific enzymes
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4 years ago

A student observed an example in which all of the offspring of an organism have the same

Sphinxa [80]

The answer is C I believe because it makes sense

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3 years ago

1. For the reaction 3A — C, the initial concentration of A was 0.2 M, and the reaction rate was

Andrew [12]

Answer:

$r=25M^{-1}s^{-1}[A]^2$

Explanation:

Hello there!

In this case, according to the given information for this chemical reaction, it is possible for us to set up the following general rate law and the ratio of the initial and the final (doubled concentration) condition:

$r=k[A]^n\\\\\frac{r_1}{r_2} =\frac{k[A]_1^n}{k[A]_2^n}$

Next, we plug in the given concentrations of A, 0.2M and 0.4 M, the rates, 1.0 M/s and 4.0 M/s and cancel out the rate constants as they are the same, in order to obtain the following:

$\frac{1.0}{4.0} =\frac{0.2^n}{0.4^n}\\\\0.25=0.5^n\\\\n=\frac{ln(0.25)}{ln(0.5)} \\\\n=2$

Which means this reaction is second-order with respect to A. Finally, we calculate the rate constant by using n, [A] and r, to obtain:

$k=\frac{r}{[A]^n} =\frac{1.0M/s}{(0.2M)^2}\\\\k=25M^{-1}s^{-1}$

Thus, the rate law turns out to be:

$r=25M^{-1}s^{-1}[A]^2$

Regards!

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3 years ago

If the formula for a compound is represented by XY2 and the charge on the Y ion is -2, what is the charge in the X ion?

Georgia [21]

The total charge of a compound must be zero. So the Y ion has charge of -2. Then the charge of X ion+(-2)*2=0. So the charge of X ion is +4.

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4 years ago

In science what can only be separated by Chemical methods​

In science what can only be separated by Chemical methods