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3 years ago

Which of the following is a safety precaution for handling radioactive material?

Chemistry

2 answers:

omeli [17]3 years ago

7 0

C.) remove yourself from the radiation every 15 mins to prevent accumulation

PtichkaEL [24]3 years ago

4 0

Answer:

Remove yourself from the radiation every 15 minutes to prevent accumulation.

Explanation:

Answer for Educere/ Founder's Education

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Mummification frequently preserves fine detail and internal organs true or false

mariarad [96]

I believe thats false. think about the mummys youve seen? do you see fine detail and intact organs

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3 years ago

Match the element with number of valence electrons

Alla [95]

Answer:

Oxygen-O = 6

Carbon C = 4

Gallium G = 3

Astatine A = 7

Arsenic As = 5

Potassium K = 1

Hydrogen H = 1

Helium H = 2

Explanation:

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2 years ago

Who has the most sensitive taste buds? the elderly adults babies teenagers

Molodets [167]

Answer:

babies have the most sensitive taste buds

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2 years ago

The concentration of Rn−222 in the basement of a house is 1.45 × 10−6 mol/L. Assume the air remains static and calculate the con

bonufazy [111]

Answer: The concentration of radon after the given time is $3.83\times 10^{-30}mol/L$

Explanation:

All the radioactive reactions follows first order kinetics.

The equation used to calculate half life for first order kinetics:

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

We are given:

$t_{1/2}=3.82days$

Putting values in above equation, we get:

$k=\frac{0.693}{3.82}=0.181days^{-1}$

Rate law expression for first order kinetics is given by the equation:

$k=\frac{2.303}{t}\log\frac{[A_o]}{[A]}$

where,

k = rate constant = $0.181days^{-1}$

t = time taken for decay process = 3.00 days

$[A_o]$ = initial amount of the reactant = $1.45\times 10^{-6}mol/L$

[A] = amount left after decay process = ?

Putting values in above equation, we get:

$0.181days^{-1}=\frac{2.303}{3.00days}\log\frac{1.45\times 10^{-6}}{[A]}$

$[A]=3.83\times 10^{-30}mol/L$

Hence, the concentration of radon after the given time is $3.83\times 10^{-30}mol/L$

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3 years ago

What happens to water when it changes to ice?

mariarad [96]

Density decreases that's why ice floats on water because it's less dense than water.

5 0

2 years ago

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