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maksim [4K]
2 years ago
11

CAN SOMEONE PLEASEEE HELP ME!

Chemistry
1 answer:
Alisiya [41]2 years ago
7 0

Answer:

1) c

2) e

3) cd

4) de

5) ef

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Even though ozone may be dangerous to our health here on Earth, how can it be beneficial in the upper atmosphere?
Annette [7]

Answer:

It absorbs ultraviolet (UV) radiation from the sun.

Explanation:

Excess UV radiation damages DNA, causing malignant skin cancers.

The ozone in the upper atmosphere is beneficial because it absorbs much of this harmful radiation.

5 0
4 years ago
In a chemical reaction at equilibrium, the rate of the forward reaction is______ the rate of the reverse reaction. If the rate o
zmey [24]

Answer:

equals

Explanation:

<h3>it means that forward reaction equals to reverse reaction</h3>
6 0
3 years ago
What does the bottom number within each box of the periodic table refer to? How can it be used to determine the number of neutro
geniusboy [140]
The number above the symbol is the atomic mass (or atomic weight). This is the total number of protons and neutrons in an atom. The number below the symbol is the atomic number and this reflects the number of protons in the nucleus of each element's atom. Every element has a unique atomic number.
4 0
3 years ago
What does it mean for an element to be reduced?
alexira [117]
When the element is reduced it gains electrons, maybe it's charge becomes more negative. 

8 0
4 years ago
Read 2 more answers
What is the volume of 0.80 grams of O2 gas at stp?
sergey [27]

<u>Answer: </u>The volume occupied by O_2 at STP is 0.56 L.

<u>Explanation:</u>

To calculate the number of moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}

We are given:

Given mass of oxygen = 0.80 g

Molar mass of oxygen = 32 g/mol

Putting values in above equation, we get:

\text{Moles of oxygen}=\frac{0.80g}{32g/mol}=0.025mol

<u>At STP:</u>

1 mole of a gas occupies 22.4 L of volume.

So, 0.025 moles of oxygen gas will occupy = 22.4\times 0.025=0.56L of volume.

Hence, the volume occupied by O_2 at STP is 0.56 L.

4 0
4 years ago
Read 2 more answers
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