3 years ago

What is Kb for CH3NH2(aq) + H2O(1) CH3NH3(aq) + OH (aq)?

Chemistry

1 answer:

statuscvo [17]3 years ago

8 0

Answer:

Kb for CH₃NH₂ (methylamine) is 4.4 × 10⁻⁴

Hope that helps.

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What superhero gained his powers by becoming a transgenic organism?

Karolina [17]

Answer:

B.spiderman

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DNA has been transferred to another species. Spiderman became Spiderman when DNA from a spider combined with a human.

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2 years ago

A certain object has a volume of 25.0 ml and a mass of 100 g. what is the density of the object

Tpy6a [65]

Density= mass/volume

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3 years ago

Convert 3 mol of Co, to grams.

GuDViN [60]

Answer:

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Explanation:

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Chemistry what is stoichiometry and the different formulas

USPshnik [31]

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2 years ago

The half-life of radium-226 is 1590 years. if a sample contains 100 mg, how many mg will remain after 1000 years?

Katyanochek1 [597]

Answer:

$a=64.7mg$

Explanation:

Hello,

In this case, we need to remember that for the required time for a radioactive nuclide as radium-226 to decrease to one half its initial amount we are talking about its half-life. Furthermore, the amount of remaining radioactive material as a function of the half-lives is computed as follows:

$a=a_0(\frac{1}{2} )^{\frac{t}{t_{1/2}} }$

Therefore, for an initial amount of 100 mg with a half-life of 1590 years, after 1000 years, we have:

$a=100mg(\frac{1}{2} )^{\frac{1000years}{1590years} }\\\\a=64.7mg$

Best regards.

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2 years ago