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3 years ago

List three possible results of a double replacement reaction

Chemistry

1 answer:

Naddik [55]3 years ago

8 0

1. two compounds form
2. precipitate forms
3. ions exchanged between the two reactants

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What is the empirical formula of a compound that has a pseudoformula of C3.5H8?

KIM [24]

Answer:

The ratio of carbon and hydrogen atoms = 3.5 : 8

= 7 : 16

Then,the empirical formula is C7H16

5 0

3 years ago

True or False: The identity of a pure substance will change when it is melted or frozen.

OlgaM077 [116]

The answer is false because its a physical change

5 0

3 years ago

I need help for this one please

stepladder [879]

Explanation:

answer is permanent dipole dipole forces hydrogen bonding and van see waals forces

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3 years ago

Which substances are always produced in an acid-base neutralization reaction? Check all that apply.

saw5 [17]

The neutralization reaction goes according to the scheme
H⁺ + OH⁻ = H₂O

acid and base react, salt and water are formed
NaOH + HNO₃ = NaNO₃ + H₂O
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4 years ago

The reaction of solid aluminum with hydrochloric acid is used to make hydrogen gas in a laboratory experiment. The reaction is 2

Gemiola [76]

Answer:

0.003088 moles of hydrogen gas were formed .

Explanation:

Pressure at which hydrogen gas is collected at 20°C = 768.0 Torr

Vapor pressure of water at 20°C = 17.5 Torr

Total pressure = Vapor pressure of water + Partial pressure of hydrogen gas

Partial pressure of hydrogen gas:

Total pressure - Vapor pressure of water

= 768.0 Torr - 17.5 Torr = 750.5 Torr = 0.987 atm

(1 Torr = 0.001315 atm)

Pressure of hydrogen gas =P = 0.986 atm

Temperature at which gas was collected ,T= 20°C = 293.15 K

Volume of the gas ,V= 75.3 mL = 0.0753 L

Moles of hydrogen gas = n

PV=nRT (An ideal gas equation)

$n=\frac{PV}{RT}=\frac{0.987 atm\times 0.0753 L}{0.0821 atm L/mol K\times 293.15 K}=0.003088 mol$

0.003088 moles of hydrogen gas were formed .

7 0

4 years ago