The speed of light is used to determine the length of a light-year. About how far does light travel in one second? A. 30 km B. 3,000 km C. 30,000 km D. 300,000 km

Answers

Answer 1
Answer: The answer would be D. 300,000 km/s

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How many grams of CO2 are in 2.1 mol of the compound?a. 21.0 g
b. 44.0 g
c. 66.0 g
d. 92.4 g

Answers

Molar mass CO₂ = 44.0 g/mol

1 mole ------- 44.0 g
2.1 mole ----- > ?

g = 44.0 * 2.1 / 1

g = 92.4 / 1

= 92.4 g

answer d

hope this helps!

Which generally occurs as temperature increases?

Answers

Solubility increases.

Answer:

solubility increases

Explanation:

For example with gases dissolved in liquids, a rise in temp would decrease solubility. There are even some solid in liquid soln where increasing temps decreases solubility.

How many cups are in 4 liters?
1L = 4.2 cups
4 L = [?] cups

Answers

Answer:

16.8 cups

Explanation:

We are given that there are 4.2 cups in in 1 liter of a liquid and we are to find out the number of cups that there will be in 4 liters.

To find this out, we will use the ratio method.

We know that:

1 L = 4.2 cups

So we can write it as:

(1L)/(4 L) =(4.2 cups)/(x)

x = 4 .2 * 4

x = 1 6 . 8

Therefore, there are 16.8 cups in 4 liters.

16.8 cups are in 4 liters. A conversion factor is a ratio that allows you to convert a quantity expressed in one unit to an equivalent quantity expressed in another unit.

It is used in various fields, such as physics, chemistry, engineering, and everyday measurements. Conversion factors are derived from the relationships between different units of measurement.

1 liter is equivalent to 4.2 cups. This conversion factor tells that for every 1 liter, we have 4.2 cups.

To find out how many cups are in 4 liters, multiply 4 liters by the conversion factor of 4.2 cups per liter:

4 liters x 4.2 cups/liter = 16.8 cups

So, 4 liters would have 16.8 cups. This means that if  4 liters of liquid are into cups, need 16.8 cups to hold it all.

To learn more about the conversion factor, follow the link:

brainly.com/question/30567263

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Which of these was most important in forming the solar system A-darkness
B-evaporation
C-cooling
D-gravity

Answers

D. Gravity because the solar system wouldn’t stay together without the gravity pulling the planets together.

Which do all groups of plants have these are the choices A.chloroplasts B.roots C.spores D.tubes

Answers

A.chloroplasts every plant needs it
Chloroplast, Needed to turn light into energy.

Do both vampires and humans have the trait listed at Point d

Answers

no they do not that would be rediculous lol you should no humans and vampires are too different things so why would they have anything in common besides personalitys thats a big mabey still