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3 years ago

Hello can anyone help?

Chemistry

2 answers:

e-lub [12.9K]3 years ago

8 0

Answer:

A ) 1, 2 and 3

Explanation:

1 ) is correct because,

K donates 1 electron

F gain 1 electron from K.

If donating and gaining of electrons takes place between two electron, then type of compound formed is ionic.

2 ) is correct because,

K + F -----> KF

3 ) is correct because,

KF is soluble in cold water; very soluble in hot water.

Andre45 [30]3 years ago

6 0

Answer:

A ) 1, 2 and 3

1 ) is correct because,

K donates 1 electron

F gain 1 electron from K.

If donating and gaining of electrons takes place between two electron, then type of compound formed is ionic.

2 ) is correct because,

K + F -----> KF

3 ) is correct because,

KF is soluble in cold water; very soluble in hot water.

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Pl help it’s for a grade

faltersainse [42]

Answer:

B) 12 m/s

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3 years ago

Please this is important

ValentinkaMS [17]

Answer:

Explanation:

2C6H6 + 9O2 -> 12CO2 + 6H20

Weight of a CO2 Mol 12+ 16x2 = 44g

In 100g number of moles = 100/44= 2.2727 Moles

Number of C6H6 2moles burned when creating 12 moles of CO2

Therefore 2.2727/12 x 2 = 0.3787

3H2SO4 + 2Al(OH)3 -> Al2(SO4)3 + 6H2O

H2O weight of a 1mol is = 2+16 = 18g

2moles of Al(OH)3 cerates 6 moles of water.

3moles of sulfuric creates 6 moles of water.

5.5moles Al(OH)3 reacts with 5.5 moles of sulfuric

Therefore number of water moles = 5.5/3 x 6 = 11moles

Weight water = 11 x 18 = 198g

Cu + 2AgNO3 -> 2Ag + Cu(NO3)2

1mol of Cu produces 2moles of silver

Ag = 107.86 g/Mol

Cu = 63.54 g/Mol

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3K2CrO4 + 2AlPO4 -> 2K3PO4 + Al2(CrO4)3

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3moles of K2CrO4 creates 1mol of Al2(CrO4)3

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7 0

3 years ago

Question 5

Igoryamba

Answer: The pressure inside the cylinder will be 2.78 atm. The pressure can be calculated using the Ideal Gas Equation which relates the pressure, volume, temperature, and amount of gas to each other.

Further Explanation

The Ideal Gas Equation is:

$PV = nRT$

where:

P - pressure (in atm)

V - volume (in L)

n - amount of gas (in moles)

R - universal gas constant $0.08206 \frac{L-atm}{mol-K}$

T - temperature (in K)

In the problem, we are given the values:

P = ?

V = 15.0 L (3 significant figures)

n = 1.75 moles N2 ( 3 significant figures)

T = 17.50 degrees Celsius (4 significant figures)

We need to convert the temperature to Kelvin before we can use the Ideal Gas Equation. The formula to convert from degree Celsius to Kelvin is:

$Temperature \ in \ Kelvin = Temperature\ in \ Celsius \ + \ 273.15$

Therefore, for this problem,

$Temperature\ in \ K = 17.50 +273.15\\Temperature\ in \ K = 290.65$

Solving for P using the Ideal Gas Equation:

$P = \frac{nRT}{V} \\P = \frac{(1.75\ mol) \ (0.08206 \ \frac{L-atm}{mol - K}) \ (290.65\ K) \ }{15.0 \ L} \\P = 2.78\ atm$

The least number of significant figures is 3, therefore, the final answer must have only 3 significant figures (P = 2.78 atm).

Learn More

1. Learn more about Boyle's Law brainly.com/question/1437490

2. Learn more about Charles' Law brainly.com/question/1421697

3. Learn more about Avogadro's Law brainly.com/question/1964205

Keywords: Ideal Gas Law, Gas Pressure

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