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3 years ago

An element's atomic number is the

1 answer:

8 0

the atomic number of a chemical element (also known as its proton number) is the number of protons found in the nucleus of an atom of that element, and therefore identical to the charge number of the nucleus.

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Which of the following has a natural pH that is acidic?

svetoff [14.1K]

Answer: Option (a) is the correct answer.

Explanation:

When rain passes through the air then carbon dioxide present in the air dissolves in the water. Further, this carbon dioxide reacts with water and results in the formation of carbonic acid.

Thus, the rain water becomes acidic in nature and as a result, there will be decrease in its pH.

Hence, we can conclude that rain has a natural pH that is acidic.

4 0

3 years ago

Read 2 more answers

Car mass of 1167 kg accelerates on a flat highway from 10.0 m/s to 28.0 m/s. how much work does thr car's engine do on the car ?

jolli1 [7]

For the work-energy theorem, the work done by the engine on the car is equal to the variation of kinetic energy of the car:
$W= K_f-K_i=\frac{1}{2}mv_f^2 - \frac{1}{2} mv_i^2$
where m=1167 kg is the mass of the car, $v_i=10.0 m/s$ is the initial speed and $v_f=28.0 m/s$ is the final speed.

Putting numbers into the equation, we find:
$W= \frac{1}{2}(1176 kg)(28.0m/s)^2- \frac{1}{2}(1167 kg)(10.0 m/s)^2=4.0 \cdot 10^5 J$

6 0

4 years ago

The author expresses the central message of the poem when she says the following quote: "I am still a night creature, but I will

luda_lava [24]

Answer:FALSE

Explanation: The Central message of a poem is the Theme of the poem, the poem is a poetry done to pass a particular message which may be regarding the present predicament of the people or to entertain. The poem the Desert Run was written in the year 1988 it was meant to express DISCRIMINATION AND HOPE. The poem was written by Mitsuye Yamada an activist of women rights and a Japanese National who lives in Seattle, Washington.

8 0

3 years ago

A car slows down from 21 m/s to rest in a distance of 63m. Assuming the car has a constant acceleration, calculate the time it t

vladimir2022 [97]

Answer:

-3.5 m/s²

Explanation:

Initial Velocity = 21m /s
Final velocity = 0m/s
Distance = 63 m .
Acclⁿ = ?

We know that :-

$\longrightarrow$ Stopping distance = u²/2(-a)

$\longrightarrow$ 63m = (21m/s)² / -2a

$\longrightarrow$ a = - 21 * 21 / 63 * 2 m/s²

$\longrightarrow$ a = - 3.5 m/s²

**Edits are welcomed**

5 0

3 years ago

If energy is continually added to a gas, what will it likely become?

tamaranim1 [39]

The gas will remain a gas and the energy will be transformed into heat raising the temperature
(Some very rare exceptions might occur)

5 0

3 years ago

An element's atomic number is the​

An element's atomic number is the