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3 years ago

What describes a change in velocity?

Chemistry

2 answers:

Oksi-84 [34.3K]3 years ago

7 0

Velocity is the displacement made per unit of time.

If direction or speed of the object change it causes change in velocity.

Acceleration is the term used for measuring the change of velocity. Acceleration is the change of velocity per unit of time.

siniylev [52]3 years ago

4 0

Acceleration can be described as changes in speed, changes in direction, or changes in both. Acceleration is a vector.

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A food chain contains a producer and 3 consumers. Primary Consumers (East producers) the arrows in a food chain show the flow of energy, from the sun or hydrothermal vent your a top predator.

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3 years ago

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According to our textbook, write the formula for the anhydrous compound that was part of the mixture called natron that was used

bearhunter [10]

Answer:

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3 years ago

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Sholpan [36]

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2 years ago

How many moles of oxygen must be placed

umka21 [38]

Answer: 0.245 moles of oxygen must be placed in the container to exert the given pressure at the given temperature. The Ideal Gas Law equation gives the relationship among the pressure, volume, temperature, and moles of gas.

Further Explanation:

The Ideal Gas Equation is:

$PV = nRT$

where:

P - pressure (in atm)

V - volume (in L)

n - amount of gas (in moles)

R - universal gas constant $0.08206 \frac{L-atm}{mol-K}$

T - temperature (in K)

In the problem, we are given the values:

P = 2.00 atm (3 significant figures)

V = 3.00 L (3 significant figures)

n = ?

T = 25.0 degrees Celsius (3 significant figures)

We need to convert the temperature to Kelvin before we can use the Ideal Gas Equation. The formula to convert from degree Celsius to Kelvin is:

$Temperature \ in \ Kelvin = Temperature\ in \ Celsius \ + \ 273.15$

Therefore, for this problem,

$Temperature\ in \ K = 25.0 +273.15\\Temperature\ in \ K = 298.15$

Solving for n using the Ideal Gas Equation:

$n \ = \frac{PV}{RT}\\n \ = \frac{(2.00 \ atm) \ (3.00 \ L)}{(0.08206 \ \frac{L-atm}{mol-K})( 298.15 \ K)} \\n \ = 0.245 \ mol$

The least number of significant figures is 3, therefore, the final answer must have only 3 significant figures.

Learn More

1. Learn more about Boyle's Law brainly.com/question/1437490

2. Learn more about Charles' Law brainly.com/question/1421697

3. Learn more about Gay-Lussac's Law brainly.com/question/6534668

Keywords: Ideal Gas Law, Volume, Pressure

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3 years ago

Which of the following actions will lead to an increase in pressure?

MatroZZZ [7]

By decreasing n we can increase presure because decrease in n will shift equilibrium to either forward or reverse direction

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3 years ago