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3 years ago

Explain how to use a graph to show whether or not the speed of an object is constant.

Chemistry

1 answer:

Sonbull [250]3 years ago

3 0

Answer:

A horizontal line on a speed-time graph represents a constant speed. A sloping line on a speed-time graph represents an acceleration. The sloping line shows that the speed of the object is changing. The object is either speeding up or slowing down.

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Crude oil is separated into different substances such as gasoline, petroleum, diesel fuel, and propane by which process ?

algol [13]

<span>Fractionation - to expand from my answer to a previous question fractionation can be used to separate out more than one component based on a specific property. You still wanted to use Distillation on the other answer. Fractionation on this one.</span>

4 0

3 years ago

Photosynthesis reactions in green plants use carbon dioxide and water to produce glucose (C6H12O6) and oxygen. A plant has 88.0

grandymaker [24]

The given question is incomplete. The complete question is:

Photosynthesis reactions in green plants use carbon dioxide and water to produce glucose (C6H12O6) and oxygen. A plant has 88.0 g of carbon dioxide and 64.0 g of water available for photosynthesis. Determine the mass of glucose (C6H1206) produced

Answer: 60.0 g of glucose

Explanation:

To calculate the moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}$

a) moles of $CO_2$

$\text{Number of moles}=\frac{88.0g}{44g/mol}=2.0moles$

b) moles of $H_2O$

$\text{Number of moles}=\frac{64.0g}{18g/mol}=3.5moles$

$6CO_2+6H_2O\rightarrow C_{6}H_{12}O_6+6O_2$

According to stoichiometry :

6 moles of $CO_2$ require = 6 moles of $H_2O$

Thus 2.0 moles of $CO_2$ require= $\frac{6}{6}\times 2.0=2.0moles$ of $H_2O$

Thus $CO_2$ is the limiting reagent as it limits the formation of product.

As 6 moles of $CO_2$ give = 1 moles of glucose

Thus 2.0 moles of $CO_2$ give = $\frac{1}{6}\times 2.0=0.33moles$ of glucose

Mass of glucose = $moles\times {\text {Molar mass}}=0.33moles\times 180g/mol=60g$

Thus 60.0 g of glucose will be produced from 88.0 g of carbon dioxide and 64.0 g of water

8 0

3 years ago

Please help me!! Asap

EastWind [94]

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7 0

3 years ago

We can tell when a chemical reaction occurs by looking

gregori [183]

10. ¿Con qué soñaba la autora cuando era niña? ¿Qué espera hoy?
11. ¿Cómo describe ella su identidad? ¿Cómo se define?
12. ¿Por qué escribe Esmeralda Santiago? ¿Qué quiere expresar a sus lectores?

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3 years ago

the radius of the Sun is approximately 696,000 kilometers, while bacterial cells are as small as 1.9 × 10-4 millimeters. Express

Mazyrski [523]

Explanation;

Writing scientific notation :

Move the decimal to the left side until single digit of number remains before the decimal.
Then we will count the number of times we moved the decimal. Write this number as the exponential power of number '10'.
For Example: $2894.55=2.89455\times 10^{3}$

Radius of the sun = 696,000.0 kilometer

$1 km=10^3 m$

Radius of the sun can also be written as = $6.96\times 10^{5} km=6.96\times 10^{5}\times 10^3 m=6.96\times 10^{8} meter$

Size of bacterial cell = $1.9\times 10^{-4}$ millimeter

$1 mm=1\times 10^{-3} m$

Size of bacterial cell can also be written as = $1.9\times 10^{-4}\times 10^{-3} m=1.9\times 10^{-7} meter$

4 0

3 years ago