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4 years ago

Give an example of two phase mixture and describe how you would separate the substances

1 answer:

7 0

<span>A two phase mixture is a mixture of two different substances. for example, a soft drink ( liquid and gas). to separate these two substances, you could heat the liquid and then capture the carbon dioxide.Also this is a question you need to answer for yourself there is many answers.</span>

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How many grams of oxygen are required to react with 12.0 grams of octane(C8H18) in the combustion of octane in gasoline?

solniwko [45]

Answer : 42 grams of oxygen are required.

Explanation :

Step 1 : Write balanced chemical equation.

The combustion reaction of octane with oxygen can be written as,

$2 C_{8}H{18} (g) + 25 O_{2} (g) \rightarrow 16 CO_{2} (g) +18 H_{2}O (g)$

Step 2 : Find moles of octane.

The given mass of octane is 12 g

Molar mass of octane is 114.2 g/mol

The moles of octane are calculated as,

$moles =\frac{grams}{MolarMass} =\frac{12g}{114.2g/mol} = 0.105 mol$

We have 0.105 mol octane.

Step 3: Use mole ratio from balanced equation to find moles of O₂

The mole ratio of octane and O₂ is 2 : 25. Let us use this as a conversion factor.

$0.105 mol C_{8}H_{18} \times\frac{25mol O_{2}}{2molC_{8}H_{18}} = 1.31 mol$

We have 1.31 mol O₂.

Step 4 : Convert moles of O₂ to grams.

The molar mass of O₂ is 32 g/mol.

The grams of O₂ can be calculated as,

$1.31 mol O_{2} \times\frac{32g}{mol} = 42 grams$

42 grams of oxygen are required.

8 0

3 years ago

Sylvie finds the solution to the system of equations by graphing. y = 2/3 x + 1 and y = -2/3x – 1 Which graph shows the solution

melisa1 [442]

Can you please show the graphs?

6 0

3 years ago

A 1.36 kg hammer at 22 ms what was the force generated by the hammer

podryga [215]

From the information given, the mass of the hammer seems to be 1.36 kg and the velocity by which it is wielded seems to be 22 m/s. The most suitable formula to be used here is : f = m × v where f is force, m is mass and v is velocity. f = m × v → f = 1.36 × 22 → f = 29.92 kg m/s Therefore the force generated by the hammer is 29.92 N ( kg m/s is the same as Newton)

6 0

3 years ago

Hurry up as fast as possible Ill mark you brainlist

Vika [28.1K]

It took 380,000 years for electrons to be trapped in orbits around nuclei, forming the first atoms.

These were mainly helium and hydrogen, which are still by far the most abundant elements in the universe. Present observations suggest that the first stars formed from clouds of gas around 150–200 million years after the Big Bang. Heavier atoms such as carbon, oxygen and iron, have since been continuously produced in the hearts of stars and catapulted throughout the universe in spectacular stellar explosions called supernovae.

6 0

3 years ago

Find w12, the work done on the gas as it expands from state 1 to state 2.

dem82 [27]

The equation for work is
W = PdV
and it is integrated and limits are the conditions of state 1 and state 2
If the gas is ideal and the expansion is isothermal, then P = nRT/V and the equation can be integrated with respect to V
If the process is adiabatic, the equation P1V1^g = PV^g can be used to substitue P in terms of conditions of State 1.

7 0

3 years ago