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irina [24]
3 years ago
15

HELLLLLLLLLLLLP ME PLS 10 points pls

Chemistry
1 answer:
lakkis [162]3 years ago
4 0
I think it is 3, but I'm not sure
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Methods used to reduce sulfur dioxide emissions from smokestacks are an attempt by humans to
olga_2 [115]
The answer is (c) lessen the environmental impact of acid rain. This is because acid rain is mainly due to the <span>sulfur dioxide (and nitrogen oxides) emissions from smokestacks (and motor vehicles). Controlling the sulfur dioxide emissions would mean an attempt to lessen the environmental impact of acid rain.</span>
6 0
3 years ago
Which of the following is a valid conversion factor?
Novosadov [1.4K]

Answer:

100cg-1g

Explanation:

This is because for:

10m=100dm

1ml = 0.001L

1000000cm3=1L

100cg=1g

7 0
3 years ago
Diethyl ether (C2H5 )2O vaporizes at room temperature. If the vapor exerts a pressure of 233 mm Hg in a flask at 25 °C, what is
Svet_ta [14]

Answer: The density of the given vapor is 0.939 g/L.

Explanation:

Given: Pressure = 233 mm Hg (1 mm Hg = 0.00131579 atm) = 0.31 atm

Temperature = 25^{o}C = (25 + 273) K = 298 K

According to the ideal gas equation,

PV = \frac{m}{M}RT

where,

P = pressure

V = volume

m = mass

M = molar mass

R = gas constant = 0.0821 L atm/mol K

T = temperature

This formula can be re-written as follows.

PM = \frac{m}{V}RT    (where, Density = \frac{mass (m)}{Volume (V)} )

Hence, formula used to calculate density of diethy ether (molar mass = 74.12 g/mol) vapor is as follows.

d = \frac{PM}{RT}

Substitute values into the above formula as follows.

d = \frac{PM}{RT}\\= \frac{0.31 atm \times 74.12 g/mol}{0.0821 L atm/mol K \times 298 K}\\= \frac{22.9772}{24.4658}\\= 0.939 g/L

Thus, we can conclude that the density of the given vapor is 0.939 g/L.

6 0
3 years ago
________ is an indication of how near the air is to saturation rather than the actual quantity of water vapor in the air.
hjlf

Answer: Relative humidity

Explanation:

Relative humidity (RH) is the ratio of the partial pressure of water vapor to the equilibrium vapor pressure of water at a given temperature. Relative humidity depends on temperature and the pressure of the system of interest. The same amount of water vapor has higher relative humidity in cool air than in warm air. A related parameter to that regard is that of dew point.

5 0
3 years ago
4. What do radio telescopes use to gather and focus radio waves?
Tom [10]
I think it would be C
5 0
4 years ago
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