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Elden [556K]
3 years ago
7

What is the molar mass of Ca(OH)2

Chemistry
2 answers:
ikadub [295]3 years ago
8 0

Answer:

74 gmol-1

Explanation:

Molar masses

Ca= 40

O = 16

H = 1

Molar mass of Ca(OH)2 = 40+16*2+1*2

= 40+32+2

=74

gavmur [86]3 years ago
4 0

Answer:

The molar mass of Ca(OH)2 is 74.092 g/mol

Explanation:

First your going to find the atomic mass of each element on the periodic table.

Ca(Calcium) = 40.078

O(Oxygen) = 15.999

H(Hydrogen) = 1.008

Then we can create the equation:

40.078 + (15.999 + 1.008) × 2

40.078 + (17.007) × 2

40.078 + 34.014

= 74.092 g/mol

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2. The pressure of the oxygen gas inside a
Flauer [41]

Answer: 4.41 atm

Explanation:

Given that,

Original pressure of oxygen gas (P1) = 5.00 atm

Original temperature of oxygen gas (T1) = 25°C

[Convert 25°C to Kelvin by adding 273

25°C + 273 = 298K

New pressure of oxygen gas (P2) = ?

New temperature of oxygen gas (T2) = -10°C

[Convert -10°C to Kelvin by adding 273

-10°C + 273 = 263K

Since pressure and temperature are given while volume is held constant, apply the formula for Charle's law

P1/T1 = P2/T2

5.00 atm /298K = P2/263K

To get the value of P2, cross multiply

5.00 atm x 263K = 298K x V2

1315 atm•K = 298K•V2

V2 = 1315 atm•K / 298K

V2 = 4.41 atm

Thus, the new pressure inside the canister is 4.41 atmosphere

4 0
3 years ago
What are the observable properties of salt and rocks, and explain how you used empirical evidence to explain that mixtures of so
777dan777 [17]

Answer:

Appearance. Pure rock salt is colorless. However, when found underground it is generally not completely pure, so may have yellow, red, gray or brown hues. It is either transparent or translucent and when you shine a light on it, its luster is vitreous, meaning it appears shiny and glassy.

Explanation:

6 0
3 years ago
A tau lepton decays into an electron, an electron antineutrino and a tau neutrino. Write out this reaction in symbolic (equation
Dmitry [639]

Answer:

.

Explanation:

hhidhwvagaue hrurifv3v2vd

5 0
3 years ago
The graph above shows the changes in temperature recorded for the 2.00 l of h2o surrounding a constant-volume container in which
Otrada [13]

Answer:

25.2 kJ

Explanation:

The complete question is presented in the attached image to this answer.

Note that, the heat gained by the 2.00 L of water to raise its temperature from the initial value to its final value comes entirely from the combustion of the benzoic acid since there are no heat losses to the containing vessel or to the environment.

So, to obtained the heat released from the combustion of benzoic acid, we just calculate the heat required to raise the temperature of the water.

Q = mCΔT

To calculate the mass of water,

Density = (mass)/(volume)

Mass = Density × volume

Density = 1 g/mL

Volume = 2.00 L = 2000 mL

Mass = 1 × 2000 = 2000 g

C = specific heat capacity of water = 4.2 J/g.°C

ΔT = (final temperature) - (Initial temperature)

From the graph,

Final temperature of water = 25°C

Initial temperature of water = 22°C

ΔT = 25 - 22 = 3°C

Q = (2000×4.2×3) = 25,200 J = 25.2 kJ

Hope this Helps!!!

6 0
3 years ago
What is the combining ratio of potassium with bromine?
shtirl [24]
1:1 They would have one of each per molecule
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3 years ago
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