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emmainna [20.7K]
3 years ago
10

Which formula is a molecular compound? H2O2 CaO MgS NaCl

Chemistry
2 answers:
Alborosie3 years ago
8 0

Answer:

H2O2

Explanation:

hammer [34]3 years ago
8 0

Answer:

H2O2

Explanation:

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Answer this please (its due tommarow)
Darina [25.2K]

Answer:

The water cycle consists of 3 major processes.

**Evaporation

**Condensation.

**Precipitation.

01)Evaporation, : Evaporation is the process of a liquid s surface changing into a gas.

02)Condensation: Condensation is the process of gas changing to a liquid.

03)Precipitation: In the water cycle, water vapour in the atmosphere condenses and become liquid.

WHAT IS WATER CYCLE DO?

## The water cycle shows the continues movement of water within the Earth and atmosphere.

** Liquid Water--------------- Water vapour. ( Evaporate)

*** Condenses-------- To Clouds

( Turn)

, and precipitations back to the form of rain and snow. Water do transform around the atmosphere.

Tip::: who made the water cycle???

The sun heat.

Sadanavam1979 Greetings

3 0
3 years ago
100.0 g water cools from 85.0°C to 20.0°C. If the specific heat of water is 4.18 J/g°C, calculate the change in energy.
Natali5045456 [20]

Answer:

-27.2 kJ

Explanation:

We can use the heat-transfer formula. Recall that:

\displaystyle q = mC\Delta T

Where <em>m</em> is the mass, <em>C</em> is the substance's specific heat, and Δ<em>T</em> is the change in temperature.

Hence substitute:


\displaystyle \begin{aligned} q & = (100.0\text{ g})\left(\frac{4.18\text{ J}}{\text{g-$^\circ$C}}\right)(20.0\text{ $^\circ$C} - 85.0\text{ $^\circ$C}) \\ \\ & =(100.0\text{ g})\left(\frac{4.18\text{ J}}{\text{g-$^\circ$C}}\right)(-65.0\text{ $^\circ$C}) \\ \\  & = -2.72\times 10^4\text{ J} = -27.2\text{ kJ}\end{aligned}

Therefore, the cooling of the water <em>released</em> about 27.2 kJ of heat.

5 0
3 years ago
What are the structures in which stars are grouped together?
disa [49]

Answer:

constellations

Explanation:

4 0
3 years ago
What often occurs at a transform plate boundary (like the San Andreas Fault in California)? *
Zarrin [17]
It’s earthquakes


hope that helps
4 0
3 years ago
Which of the radioactive emissions has the highest energy
hodyreva [135]
The correct answer is the gamma ray. It has the most penetration power and will pass through a number of things. Also, a gamma ray has shorter wavelength therefore higher energy from the equation, Energy = hc/wavelength.
5 0
3 years ago
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