4 years ago

Compare the occurrence of heavier elements on earth and the universe.

1 answer:

3 0

By definition, a heavy element is a specific kind of element with a larger atomic mass. An element could be considered as "heavy" if its atomic number is greater already than 92. One of the known heavy elements on Earth is Tennessine and Tungsten while in the universe are lithium-5 and berryllium-8.

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Someone please help will mark as brainliest

Tju [1.3M]

Answer: The answer is D.

Explanation: The warm water will cause the sugar to dissolve quicker.

5 0

3 years ago

If I contain 3 moles of gas in a container with a volume of 60 liters and at a temperature of 400 K, what is the pressure inside

olasank [31]

Answer:

n = 3.0 moles

V = 60.0 L

T = 400 K

From PV = nRT, you can find P

P = nRT/V = (3.0 mol)(0.0821 L-atm/K-mol)(400 K)/60.0L

P = 1.642 atm = 1.6 atm (to 2 significant figures)

Explanation:

6 0

3 years ago

Read 2 more answers

4. A gas occupies 1.56 L at 2.00 atm. What will be the volume of this gas if the pressure becomes 4.00 atm?

tekilochka [14]

Answer:

0.78 L

Explanation:

From Boyle's Law :

P₁V₁ = P₂V₂

Here :

P₁ = 2.00 atm
V₁ = 1.56 L
P₂ = 4.00 L

Solving :

V₂ = P₁V₁ / P₂
V₂ = 2 x 1.56 / 4
V₂ = 1.56 / 2
V₂ = 0.78 L

5 0

2 years ago

Compared to an atom of C-12, an atom of C-14 has

KonstantinChe [14]

Explanation:

Carbon-12 atoms have stable nuclei because of the 1:1 ratio of protons and neutrons.

Carbon-14 atoms have nuclei which are unstable. C-14 atoms will undergo alpha decay and produce atoms of N-14. Carbon-14 dating can be used to determine the age of artifacts which are not more than 50,000 years old.

8 0

3 years ago

What is the oxidation state of P in PO43-? O A. +8 O B. +3 O C. +5 OD. +2

erastovalidia [21]

Answer:

the answer is +5

Explanation:

good luck :)

6 0

3 years ago