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3 years ago

Which of the following is the energy of motion? O Elastic energy O Gravitational energy O Kinetic energy O Potential energy

Chemistry

1 answer:

Firlakuza [10]3 years ago

8 0

Answer:

kinetic energy

Explanation:

all moving objects have kinetic energy. when an object is an motion it changes its position by moving in a direction: up,down, forward, or backward

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When converting from grams to the must be used as a conversion factor

Anna35 [415]

Moles=grams/molar mass

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3 years ago

How do people use bromine?

EastWind [94]

Bromine is used in many areas such as the following agricultural chemicals, dyestuffs, insecticides, pharmaceuticals and chemical intermediates. Some of the uses are being phased out for environmental reasons, but new uses can be found with Bromine can be used for furniture foam, plastic casings for electronics and textiles to make them less flammable

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4 years ago

According to Boyle’s law, when the pressure of a gas increases at constant temperature, its volume

TEA [102]

Answer:

reduces

Explanation:

According to Boyle's law, when the pressure of a gas increases at constant temperature the volume reduces.

Boyle's law states that "the volume of fixed mass of a gas is inversely proportional to the change in pressure if the temperature is constant".

It suggests that at constant temperature, if pressure increases, temperature reduces.

Mathematically, it is expressed as;

P1 V1 = P2 V2

P and V are pressures

1 and 2 are initial and finals state.

3 0

3 years ago

Read 2 more answers

Fractional distillation is used to separated

UkoKoshka [18]

Answer: Fractional distillation is used to separate liquids with differing boiling points

Explanation:

Sublimation is used to separate volatile substance from a non volatile substance where volatile substance gets converted from solid to gas.

Fractional distillation is separation of a liquid mixture into fractions which differ in boiling points by means of distillation by use of a fractionating column.

Chromatography is a separation method where different rates of adsortion of different components is used to separate substances.

5 0

3 years ago

If 21.42g of KMnO4 is actually produced what is the percent yield

mrs_skeptik [129]

Answer:

Percentage yield = 6.776%

Explanation:

Data Given:

Actual yield of KMnO₄ = 21.42g

Percentage Yield = ?

Formula Used to find Percent yield

Percentage yield = Actual yield/ theoretical yield x 100 (1)

For this Pupose First step is

We have to know the theoretical yield KMnO₄

Potasium permagnate form from MnO₄ and KOH in the presence of Oxygen by heating, in 1st step in second 2K₂MnO₄ react with HCl and give KMnO₄ .

The Reactions of formation of KMnO₄

1st Step

2MnO₄ + 4KOH + O₂ ------------> 2K₂MnO₄ + 2H₂O

2nd Step

2K₂MnO₄ + 4HCl ------------->2 KMnO₄ + H₂O + 4KCl

So form the above equation we come to know it produced 2 Mole of KMnO₄

Now we will calculate the mass of KMnO₄ by mass formulae

mass of KMnO₄ = Number of mole of KMnO₄ x Molar Mass of KMnO₄

Molar Mass of KMnO₄ = 158.034g /mol

Put value in Mass Formula

mass of KMnO₄ = 2 mol x 158.034g/mol

mass of KMnO₄ = 316.1 g

So the theoratical yield per standard reaction = 316.1 g

Now put all values in equation 1

Percentage yield = Actual yield/ theoretical yield x 100

Percentage yield = 21.42g / 316.1 g x 100

Percentage yield = 0.0678 x 100

Percentage yield = 6.776%

4 0

3 years ago

Which of the following is the energy of motion? O Elastic energy O Gravitational energy O Kinetic energy O Potential energy​

Which of the following is the energy of motion? O Elastic energy O Gravitational energy O Kinetic energy O Potential energy