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koban [17]
3 years ago
10

Please help!!! Its not chemistry is science.

Chemistry
1 answer:
laiz [17]3 years ago
7 0
You would want to know everything just Incase anything happens because maybe you get lost
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How many moles are in 12 grams of NH3?​
aleksklad [387]

Answer:

molecular weight of NH3 or grams This compound is also known as Ammonia. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles NH3, or 17.03052 grams.

8 0
3 years ago
Glass of orange juice contain 0.90 dL of juice. How many milliliters of orange juice is that?
dlinn [17]
.90 dL is 90 mL because 1 dL is 100 mL
6 0
3 years ago
2 moles of substance A contains 12.04 × 1023 atoms.
professor190 [17]

Answer:

2 moles of Substance B

Explanation:

Because 1 mole of any substance contains 6.02× 10²³ particles either atoms, molecules, ions or even electron(Avogardo Constant)

Therefore 12.04 × 10²³/ 6.02× 10²³  =  2 mole of Substance B

7 0
2 years ago
A very old tree limb contains an amount of carbon-14 that is approximately 1/8 of the current atmospheric 14C levels.. Calculate
Tomtit [17]

A.       The radioactive decay equation is N = N0e^{-ln(2)*t/T }

where T is the half-life (5730 years), N0 is the number of atoms at time t = 0 and N is the number at time t.

Rewriting this as:

(N/N0) = e^{-ln(2)*t/T }

Since N = (1/8) N0 and substituting known values:

1/8 = e^{-ln(2)*t/5730}

Taking ln of both sides:

ln(1/8)= -ln(2)*t/5730

t = - 5730 * ln(1/8) / ln (2)

t = 17,190 years

The tree was cut down 17,190 years ago.

B.   N0 = 1,500,000 carbon-14 atoms

Since N = (1/8) N0

N = 187,500 carbon atoms left

3 0
3 years ago
I. Choose the letter of the correct answer. Write your answer on a separate sheet of paper.
omeli [17]

Answer:

,,,

Explanation:

..

6 0
2 years ago
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