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3 years ago

8

Where does the heat that is needed to warm the surface of the ocean come from? A. the Sun B. the Earth's interior C. animals D.

the Earth's surface

2 answers:

Y_Kistochka [10]3 years ago

7 0

Answer:

A

Explanation:

Most of our heat source on Earth comes from the Sun.

sergeinik [125]3 years ago

4 0

Answer:

A. The Sun

Explanation:

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90 grams of glucose, C6H12O6, is dissolved in 2 liters of solution. Determine the molarity (M).

Masja [62]

Answer:

0.25 M

Explanation:

The first step is to determine how many moles of glucose there are, which means first finding out the molar mass of glucose. Carbon has a molar mass of about 12, hydrogen 1, and oxygen 16, so the total molar mass of glucose is about 6(12)+12(1)+6(16)=180 grams. This means that 90 grams is half a mole. Half a mole of substance divided by two liters of solution is (1/2)/2=1/4, or a molarity of 0.25. Hope this helps!

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4 years ago

Jamal was riding his bike home at a speed of 12 mph. On his trip out, he had traveled 8 miles away from his house. He has been t

NikAS [45]

Jamal is 2 miles away from his home.

Option B.

<h3><u>Explanation:</u></h3>

The initial distance of Jamal from his home is 8 miles. He needs to return home from his trip.

The speed that Jamal kept was constant for 30minutes and he drove at a speed for 12 miles per hour.

Speed of Jamal = 12 mph.

Time of travel = 30minutes =0.5 hours.

So distance traveled by Jamal = $12 \times0.5$ miles. = 6miles.

Initial distance of Jamal = 8 miles.

So final distance = $8-6$ miles = 2miles.

So Jamal is 2 miles away from his home.

3 0

3 years ago

Read 2 more answers

How does reducing the temperature of chemical reaction affect the rate at which it occurs?

Licemer1 [7]

Answer:

When you lower the temperature, the molecules are slower and collide less. That temperature drop lowers the rate of the reaction. When you increase the pressure, the molecules have less space in which they can move. That greater density of molecules increases the number of collisions.

Explanation:

would u like to do a zoom?

If u can...

im just bored and my friend fell asleep on me :/

6 0

3 years ago

Read 2 more answers

Chemical and physical element properties are determined by their valence electrons. How do you describe metals with only one val

Y_Kistochka [10]

Answer:

B

Explanation:

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3 years ago

Express the result of the following calculation in scientific notation: 0.0263 cm2÷ 88.2 cm

VikaD [51]

<u>Answer:</u> The result of the given calculation is $2.98\times 10^{-4}cm$

<u>Explanation:</u>

Scientific notation is defined as the notation in which a number is expressed in the decimal form. This means that the number is always written in the power of 10 form.

We are given an expression:

$\Rightarrow \frac{0.0263cm^2}{88.2cm}$

The operation carried out in the above expression is division operation. The units are also treated in the same way.

The solution for the above expression is:

$\Rightarrow \frac{0.0263cm^2}{88.2cm}=0.000298cm$

The value in scientific notation is $2.98\times 10^{-4}cm$

Hence, the result of the given calculation is $2.98\times 10^{-4}cm$

3 0

4 years ago