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sergiy2304 [10]
3 years ago
9

What name describes the top-level aquifer?

Chemistry
1 answer:
Katyanochek1 [597]3 years ago
3 0

Answer:

A

Explanation:

because the rain go down in the earth

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You have 125 g of a certain seasoning and are told that it contains 92.0 g of salt. What is the percentage of salt by mass in th
PSYCHO15rus [73]
92.0g/ 125g = .736
.736•100 = 73.6%
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4 years ago
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[15 Points, Stoichiometry and Gases]
KiRa [710]

The reaction is

CaC₂(s) + 2H₂O (l) -----> Ca(OH)₂ (s) + C₂H₂ (g) ​

As we have data of gas ethyne (or acetylene), C₂H₂

We can calculate the moles of acetylene and from this we can estimate the mass of calcium carbide taken

the moles of acetylene will be calculated using ideal gas equation

PV =nRT

R = gas constant = 0.0821 Latm/molK

T = 385 K

V = volume = 550 L

P = Pressure = 1.25 atm

n = moles = ?

n = PV /RT = 1.25 X 550 / 0.0821 X 385 = 21.75 mol

As per balanced equation these moles of acetylene will be obtained from same moles of calcium carbide

moles of calcium carbide = 21.75mol

molar mass of CaC₂ = 40 + 24 = 64

mass of CaC₂ = moles X molar mass = 21.75 X 64 = 1392g

6 0
4 years ago
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A gas in a rigid container at 25°C has a pressure of 0.96 atm. A change in temperature causes the pressure to increase to 1.25 a
Alona [7]
T1=298.15K, P1=0.96 atm, P2=1.25 atm, T2=?
(P1/T1)=(P2/T2)
(0.96)/(298.15)=(1.25)/(T2)
(1.25)/((.96)/(298.15))=T2
T2=388.2161458K
T2=115.0661 degrees Celsius
7 0
3 years ago
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Which of the following is the best characterization of the nature of light?
ahrayia [7]

Answer:  Light is a transverse, electromagnetic wave that can be seen by the typical human. The wave nature of light was first illustrated through experiments on diffraction and interference

Explanation:

7 0
3 years ago
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A gas at 20.0°C is increased to 40.0°C, will its volume: if the original volume is 1.00 l, what would the new volume be
Leona [35]

Answer:

2.0 l

Explanation:

When for 20 °C volume is 1 l then for 40°C is going to be 2 l

20-------1

40-------x

x=(40*1):20

6 0
3 years ago
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