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SOVA2 [1]
3 years ago
12

Help!!! pleaseeeee!!

Chemistry
2 answers:
Masja [62]3 years ago
5 0

Answer:

D) wind and solar

Explanation:

It's simple, the sun will never stop shining and the wind will never stop blowing PLEASE MARK ME AS BRAINLIEST

makvit [3.9K]3 years ago
4 0
It’s d cause both wind and solar are renewable resources :)
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The mass of an object is measured to be 55.6 g. Its volume is measured to be 48.5 mL.
Nezavi [6.7K]

Answer:

1.15 g/mL

Explanation:

The following data were obtained from the question:

Mass (m) = 55.6 g

Volume (V) = 48.5 mL

Density (D) =?

Density is simply defined as the mass of the substance per unit volume of the substance. It is represented mathematically as:

Density (D) = mass (m) /volume (V)

D = m/V

With the above formula, we can obtain the density of the object as follow:

Mass (m) = 55.6 g

Volume (V) = 48.5 mL

Density (D) =?

D = m/V

D = 55.6/48.5

D = 1.15 g/mL

Therefore, the density of the object is 1.15 g/mL

6 0
4 years ago
How many moles of
docker41 [41]

Answer:

Im highy

Explanation:

6 0
3 years ago
A 7.028 gram sample of a sodium sulfate hydrate is heated. After driving off all the water, 3.100 grams of the anhydrous salt is
Nady [450]

Answer:

NaSO_4.10H_2O

Explanation:

Given that:-

Mass of the hydrated salt = 7.028 g

Mass of the anhydrous salt = 3.100 g

Mass of water eliminated = Mass of the hydrated salt - Mass of the anhydrous salt = 7.028 - 3.100 g = 3.928 g

<u>Moles of water: </u>

Mass of water = 3.928 g

Molar mass of H_2O = 18 g/mol

The formula for the calculation of moles is shown below:

moles = \frac{Mass\ taken}{Molar\ mass}

Thus, moles are:

moles= \frac{3.928\ g}{18\ g/mol}

moles_{water}= 0.2212\ mol

<u>Moles of anhydrous salt: </u>

Amount = 3.100 g

Molar mass of NaSO_4 = 142.04 g/mol

Thus, moles are:

moles= \frac{3.100\ g}{142.04\ g/mol}

moles_{CaSO_4}= 0.02182\ mol

The simplest ratio of the two are:

NaSO_4:H_2O =0.02182 :  0.2212 = 1 : 10

<u>Hence, the formula for hydrate is:- NaSO_4.10H_2O</u>

7 0
3 years ago
10. Hydrogen and sulfur combine to make hydrogen sulfide.
Genrish500 [490]

Answer:

H₂S

Explanation:

8 0
4 years ago
The planets closest to the Sun are the inner, or terrestrial, planets and are similar to Earth in some ways. They are rocky and
crimeas [40]

Answer:

B) The farther away from the Sun, the thinner a planet's atmosphere. Closer planets need more protection from the heat.

Explanation:

The planets closest to the Sun are the inner, or terrestrial, planets and are similar to Earth in some ways. They are rocky and dense, have few moons, no rings, and are relatively small. These planets also differ in many ways, as shown in the chart. For example, Venus is the hottest planet on the chart, even though Mercury is closer to the Sun. The temperature difference between Venus and Earth is significantly greater than the difference between Venus and Mercury, even though Venus lies close to midway between those two planets.

6 0
4 years ago
Read 2 more answers
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