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nexus9112 [7]
3 years ago
7

What type of element is most abundant: metals, nonmetals, or metalloids?

Chemistry
2 answers:
AnnyKZ [126]3 years ago
7 0
Metals are the most abundant
stellarik [79]3 years ago
6 0
The most abundant is metals
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ryzh [129]
I think the answer is sunlight
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How many moles of ethane gas, C2H6(g), will occupy 15.0 L at 30 degrees Celsius and 5.0 atm?
Alenkinab [10]

Answer:

3 mol

Explanation:

Given data:

Volume of ethane = 15.0 L

Temperature = 30°C

Pressure = 5.0 atm

Number of moles of ethane = ?

Solution:

PV = nRT

P= Pressure

V = volume

n = number of moles

R = general gas constant = 0.0821 atm.L/ mol.K  

T = temperature in kelvin

Now we will convert the temperature.

30+273 = 303 K

5.0 atm × 15.0 L = n×0.0821 atm.L/ mol.K   × 303 K

75 atm.L =  n× 24.87 atm.L/ mol

n = 75 atm.L / 24.87 atm.L/ mol

n = 3 mol

8 0
3 years ago
17. An industrially important element contains
likoan [24]

Answer:

Iron (Fe)

Explanation:

The number of electrons (-) is usually the same as the number of protons (+) in the atom of the element (unless it is an ion).

The element described has 26 electrons, so we can assume that it has 26 protons as well. The number of protons in an atom is the atomic number of element that the atom is.

Element 26 on the PTE is Iron (Fe), which does rust (oxidation) in air and water.

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3 years ago
When potassium carbonate and calcium chromate are mixed, which of the following will pass through a filter?
aliina [53]

Calcium carbonate will be formed which is insoluble in water.

The answer is a) K and CrO4 only.

8 0
3 years ago
the atomic mass of N is 14.01 g/mol and the atomic mass of H is 1.008 g/mol. what is the molecular mass of NH3
nikdorinn [45]
Molecular mass= (14.01∗1)+(1.008∗3)
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7 0
3 years ago
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