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3 years ago

Answer them please i cant figure out what it is

Chemistry

1 answer:

miss Akunina [59]3 years ago

6 0

Answer:

iv. The motion between A & B moves at a further distance than C & D's

v. The cyclist travels 800 meters

vi. It takes approx. 80 seconds

vii. The cyclist's speed is 10 meters per second (m/s)

viii. The cyclist's speed is also 10 meters per second (m/s)

vii. (2) The cyclist's average speed is 10 meters per second (m/s)

Explanation:

Speed is calculated using the formula distance divided by time (d/t)

vii (2) needs further explanation:

Though there is a moment of rest, the cyclist still travels the same speed throughout the entire trip. To check this answer however, you can total the distance and time the cyclist traveled and use speed formula to get 10 meters per second, again.

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A sample of nitrogen gas with a volume of 180 cm at a temperature of

maksim [4K]

Answer:

The final pressure of gas is 82.64 KNm⁻²

Explanation:

Given data:

Initial volume of gas = 180 cm³

Temperature of gas = 27°C

Initial pressure = 101 KNm⁻²

Final volume = 220 cm³

Final pressure = ?

Solution:

The given problem will be solved through the Boly's law,

"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"

Mathematical expression:

P₁V₁ = P₂V₂

P₁ = Initial pressure

V₁ = initial volume

P₂ = final pressure

V₂ = final volume

Now we will put the values in formula,

P₁V₁ = P₂V₂

101 KNm⁻² × 180 cm³ = P₂ × 220 cm³

P₂ = 18180 KNm⁻². cm³/220 cm³

P₂ = 82.64 KNm⁻²

The final pressure of gas is 82.64 KNm⁻².

4 0

3 years ago

A mug of boiling-hot water sits next to a glass of ice water.

seraphim [82]

Answer:

a) water molecules move rapidly in the mug of boiling water while they move slowly in the ice water. In the ice itself, the molecules stay in place.

b) Water must release energy to move from a higher to lower energy phase, i.e., from gas (water) vapor to liquid during condensation and from liquid to solid (ice) during freezing. In each case, the energy released by the water results in a change in the internal molecular bonding structure.

Explanation:

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3 years ago

___ The energy of moving particles.

Sever21 [200]

Anything that is moving has kinetic energy, and the faster it is moving, the more kinetic energy it has. The total kinetic energy of moving particles of matter is called thermal energy. ... That's because the particles of all matter are in constant motion and have kinetic energy.

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3 years ago

O Neutralization reactions are a type of__________

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Answer:

nala

simba

Explanation:

5 0

3 years ago

The pressure on 30 milliliter of an ideal gas increases from 101.3 kPa to 202.6 kPa at constant temperature. What is the new vol

ratelena [41]

Answer:

The new volume is 0.015 L

Explanation:

Boyle's Law is a gas law that relates the pressure and volume of a certain amount of gas, without temperature variation, that is, at constant temperature.

Boyle's law says:

"The volume occupied by a given gas mass at constant temperature is inversely proportional to the pressure"

That is to say that if the pressure increases, the volume decreases and if the pressure decreases, the volume increases.

Boyle's law is expressed mathematically as:

Pressure * Volume = constant

or P * V = k

If a change in pressure or volume occurs at a constant temperature, the following is true:

P1*V1 = P2*V2

Where P1 and V1 are the pressure and volume in state 1 and P2 and V2 are the pressure and volume in state 2.

That is, the product between the initial pressure and the initial volume is equal to the product of the final pressure times the final volume.

In this case:

P1= 101.3 kPa=101,300 Pa (being 1 kPa=1,000 Pa)
V1= 30 mL= 0.03 L (1 L= 1,000 mL)
P2= 202.6 kPa=202,600 Pa
V2= ?

Replacing:

101,300 Pa*0.03 L=202,600 Pa* V2

Solving:

$V2=\frac{101,300 Pa*0.03 L}{202,600 Pa}$

V2= 0.015 L

<u><em>The new volume is 0.015 L</em></u>

5 0

3 years ago