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2 years ago

What is the total number of grams of h2o produced when 22 grams of propane undergoes complete combustion?

1 answer:

5 0

The combustion reaction of propane would be expressed as:

C3H8 + 5O2 = 3CO2 + 4H2O

To determine the mass of water that is produced from the given amount of propane, we use the mass of propane and the relation of the substances from the balanced reaction. We do as follows:

moles propane = 22 g C3H8 ( 1 mol / 44.1 g ) = 0.50 mol C3H8
moles H2O = 0.50 mol C3H8 ( 4 mol H2O / 1 mol C3H8) = 2 mol H2O
mass H2O = 2 mol H2O ( 18.02 g / 1 mol ) = 36.04 g H2O

Therefore, the mass of water that is produced from 22 grams of propane would be 36.04 g.

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When calcium forms an ion that has the same number of outer electrons as which noble gas?

Talja [164]

The answer is 4 krypton

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3 years ago

How many milliliters of 0.0896M LiOH are required to titrate 25.0 mL of 0.0759M HBr to the equivalence point?

slavikrds [6]

Answer:

$V_{LiOH}=21.8mL$

Explanation:

Hello,

In this case, during titration at the equivalence point, we find that the moles of the base equals the moles of the acid:

$n_{LiOH}=n_{HBr}$

That it terms of molarities and volumes we have:

$M_{LiOH}V_{LiOH}=M_{HBr}V_{HBr}$

Next, solving for the volume of lithium hydroxide we obtain:

$V_{LiOH}=\frac{M_{HBr}V_{HBr}}{M_{LiOH}} =\frac{0.0759M*25.0mL}{0.0896M} \\\\V_{LiOH}=21.8mL$

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2 years ago

If a machine decreases the distance an object moves, it must also _____.

mart [117]

increase the force needed to move the object

Explanation:

If a machine decreases the distance an object moves, it must also increase the force need to move the object.

A machine is a device that is used to do work with a little energy input.

Work done = force x distance

We see that to do more work, a lot of force must be applied to move a body through a greater distance.

If the distance is reduced;

Distance = $\frac{Work done {force}$

More force must be applied to measure up for the distance and make the machine more efficient.

learn more:

Work done brainly.com/question/9100769

#learnwithBrainly

3 0

2 years ago

How many liters are in 35 g of CO2?

aleksley [76]

Answer:

1.977 grams

At one atmosphere and 0 degrees C, the density of CO2 gas is 1.977 grams per liter. Multiply the volume, in liters, by 1.977 to get the number of grams of CO2.

Explanation:

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2 years ago

What information about a compound is given in a chemical formula

rodikova [14]

Answer:

Explanation:

A chemical formula is representation of a compound. Compounds are made up of two or more elements combining together.

The chemical formula of any compound is a representation which shows the elements therein and the mole relationship expressed as subscripts.

For example, HCl;

Elements in HCl - Hydrogen (H)

Chlorine (Cl)

Here 1 mole of hydrogen chloride molecule consists of 1 mole of chlorine atoms and 1 mole of hydrogen atoms.

4 0

3 years ago