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Marysya12 [62]
3 years ago
6

Which class of organic compounds has molecules that contain nitrogen atoms?

Chemistry
1 answer:
ziro4ka [17]3 years ago
7 0
2) amine is the correct answer 
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What is the period number in which helium is found
julsineya [31]

Answer:

Helium is the second element on the periodic table. It is located in period 1 and group 18 or 8A on the righthand side of the table. This group contains the noble gases, which are the most chemically inert elements on the periodic table. Each He atom has two protons and usually two neutrons and two electrons.

Explanation:

thoughtco.com

6 0
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A flashbulb of volume 2.70 mL contains O2(g) at a pressure of 2.30 atm and a temperature of 30.0 °C. How many grams of O2(g) doe
Sholpan [36]
P = 2.30 atm

Volume in liter = 2.70 mL / 1000 => 0.0027 L

Temperature in K = 30.0 + 273 => 303 K

R = 0.082 atm

molar mass O2 = 31.9988 g/mol

number of moles O2 :

P * V = n * R* T

2.30 * 0.0027 = n * 0.082 * 303

0.00621 = n * 24.846

n = 0.00621 / 24.846

n = 0.0002499 moles of O2

Mass of O2:

n = m / mm

0.0002499 = m / 31.9988

m = 0.0002499 * 31.9988

m = 0.008 g
3 0
3 years ago
2Fe2O3+3C_4Fe+3 CO2 how many moles of Carbon are needed to produce 1.9 moles of iron (Fe)?​
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In which state of matter does heat travel fastest and slowest?
MariettaO [177]

Answer:

Heat travels faster in solids.

Heat travels slower in gases.

Explanation:

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Which noble gas is closest to sulfur on the periodic table
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