Ask question

Ask question

All categories

Norma-Jean [14]

2 years ago

5

An element has a half-life of 30 years. if 1.0 mg of this element decays over a period of 90 years, how many mg of this element

would remain?

1 answer:

labwork [276]2 years ago

6 0

Answer:

144.6

Explanation:

You might be interested in

professional and amateur athletes often tested for the use of illegal performance in Hensing drugs which process is used to sepa

Wittaler [7]

Answer:

Chromatography

Explanation:

7 0

2 years ago

Read 2 more answers

Directions are in the picture

LuckyWell [14K]

Answer:

B

Explanation:

The time it takes for half of the radioactive atoms to decay to a stable state.

Hope this helped!

3 0

2 years ago

Calculate hydrochloric acid (umol)in 200 ul of a<br> 0.5173Msolution of acid?

strojnjashka [21]

<u>Answer:</u> The moles of hydrochloric acid is $1.0346\times 10^{-4}\mu mol$

<u>Explanation:</u>

To calculate the molarity of solution, we use the equation:

$\text{Molarity of the solution}=\frac{\text{Moles of solute}}{\text{Volume of solution (in L)}}$

Or,

$\text{Molarity of the solution}=\frac{\text{Micro moles of solute}\times 10^6}{\text{Volume of solution (in }\mu L)}}$

We are given:

Molarity of solution = 0.5173 M

Volume of solution = $200\mu L$

Putting values in above equation, we get:

$0.5173M=\frac{\text{Micro moles of HCl}\times 10^6}{200\mu L}\\\\\text{Micro moles of HCl}=1.0346\times 10^{-4}\mu mol$

Hence, the moles of hydrochloric acid is $1.0346\times 10^{-4}\mu mol$

7 0

2 years ago

What change would increase the amount of solid solute able to be dissolved in liquid water?

exis [7]

Bonjour,

increasing temperature.
for many solids dissolved in liquid water, the solubility increases with temperature.

3 0

2 years ago

Which best describes the pH scale?

oksano4ka [1.4K]

The answer is B. bases measure below seven
think of it like this 7 is neutral going down from seven it rises in acidity and going up from seven increases in alkalinity

4 0

3 years ago