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3 years ago

Choose the correct answers from the drop-down menus to complete the paragraph about how sunlight travels through the atmosphere.

Chemistry

2 answers:

Georgia [21]3 years ago

8 0

Answer:just did the assignment on ingenuity and got it correct

Explanation:

Alex_Xolod [135]3 years ago

6 0

Answer: reflected, clouds, greenhouse effect.

Explanation:

Sunlight can be absorbed, reflected , or scattered before it reaches Earth’s surface. About 30 percent of sunlight hits Earth directly, and 22 percent is filtered through clouds . Dust particles scatter short wavelengths, which causes the sky to appear blue. Earth radiates heat into the atmosphere, which traps the heat in gases, causing the greenhouse effect.

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Some water released 7800 J of energy when cooled from 78°C to 33°C. What was the mass of the water?

Karo-lina-s [1.5K]

Answer:

-41. 47

Explanation:

m = q / Cp x T

m = Mass

q = Energy (or joules)

Cp = Heat Capacity

T = Change in Temperature

Water's heat capacity is always 4.18.

This is the formula you'll need for change in temperature:

Final - Initial

So, 33 - 78 = -45

m = 7800 / 4.18 x -45

= -41.47

4 0

2 years ago

3. Which physical property is shown by scratching one material with another?

sveta [45]

The answer is malleability.

7 0

3 years ago

Name 2 physical properties that would allow differentiation between copper, lead and iron shot.

Olegator [25]

Answer:

Two physical properties that would allow differentiation between copper, lead and iron shot are - Color and Density

COPPER - Color - Copper has a reddish brown color .

 Density - Density of copper is 8.96 $g/cm^{3}$

LEAD - Color - Lead is grey in color.

Density - Density of Lead is 11.34 $g/cm^{3}$ 

IRON SHOT - Color- Iron shot is in grey color with extra shine .

 Density - Density of iron shot is 10.49 $g/cm^{3}$

Explanation:

COPPER- Copper (Cu) is a reddish, highly ductile metal that belongs to Group 11 (Ib) of the periodic table and is a particularly excellent conductor of electricity and heat. Copper is found in nature in its free metallic state.

LEAD- Lead (Pb) is a soft, silvery white or grayish metal in Periodic Group 14 (IVa). Lead is a weak conductor of electricity and is very malleable, ductile, and thick. Lead, which has been known since antiquity and is considered the oldest of metals by alchemists, is extremely durable and corrosion-resistant, as evidenced by the continued use of lead water pipes constructed by the ancient Romans.

IRON SHOT - Small round iron balls used as projectiles are known as iron shot. Balance scales are used with simple weights. Iron balls are used in the shot put competition.

Hence , the differentiation is mentioned in the above answer.

4 0

3 years ago

Which element has chemical properties that are most similar to those of calcium?

iris [78.8K]

I think the answer is (1) Co. Because the element of Cobalt also has 2 electrons at the outer layer which is the same as Calcium. And the outer layer is an important factor which can affect the property of an element.

3 0

4 years ago

Read 2 more answers

How many aluminum ions are present in 65.5 mL of 0.210 M All3solution?

nadezda [96]

Answer:

Aluminium ions present's in 65.5mL of 0.210

M All 3solution is Given below-:

Answer and Explanation: 1

The first step is to determine the moles of aluminum ions. This utilizes the volume, molar concentration, and subscripts from the chemical formula of aluminum (III) fluoride as shown.

65.5 mL×1 L1000 mL×0.210 mol AlF31 L×1 mol Al3+1 mol AlF3=0.013755 mol Al3+65.5 mL×1 L1000 mL×0.210 mol AlF31 L×1 mol Al3+1 mol AlF3=0.013755 mol Al3+

To calculate for the number of aluminum ions, we use Avogadro's number as shown.

0.013755 mol Al3+×6.022×1023 ions1 mol Al3+=8.28×1021 ions Al3+.

Itz the ans. of collage ok man.

8 0

3 years ago

Read 2 more answers