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Alex777 [14]
4 years ago
5

How many atoms of each element are present in the compound

Chemistry
2 answers:
Lera25 [3.4K]4 years ago
8 0
...............................................c
zloy xaker [14]4 years ago
6 0

a compound includes more than two elements but is a pure substance

Explanation:

hope this helped

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The half-life of a radioactive isotope is 20 minutes. What is the total amount of 1.00 g of sample of this isotope remaining aft
Nikolay [14]
So since every 20 mins the mass will be cut in half (and that happens 3 times), you have just got to divide 1g by 2, 3 times.

after 20 mins the mass will be .5

after 40 mins the mass will be .25

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6 0
3 years ago
Four elements are shown as they appear in the periodic table. which statement makes an accurate comparison of some of these elem
disa [49]

Answer:

An atom of titanium has fewer protons than an atom of vanadium but more protons than an atom of scandium.

Explanation:

I was given this answer from the teacher

4 0
3 years ago
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alexandr402 [8]

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The decomposition of nitrogen dioxide is described by the following chemical equation: Suppose a two-step mechanism is proposed
Mandarinka [93]

Answer:

<u>first step </u>

NO2(g)  ------------------------------------> NO(g) + O(g)

<u>second step</u>

NO2(g) + O(g) -----------------------------> NO(g) + O2(g)

Explanation:

<u>first step </u>

NO2(g)  ------------------------------------> NO(g) + O(g)

<u>second step</u>

NO2(g) + O(g) -----------------------------> NO(g) + O2(g)

8 0
3 years ago
Which of the following sentences describes oxygen at room temperature? (check all that apply)
Degger [83]

At room temperature, O2 is in gaseous state.

a gas has no definite volume or definite shape. It occupies volume of container and attains shape of container only.

Thus

It has no definite volume and takes the shape of its container.

Its particles move fast enough to overcome the attraction between them.: the gas molecules have minimum intermolecular interactions and have high kinetic energy.

It has more energy than it would at a cooler temperature: the kinetic energy of gas molecules increases with increase in temperature. Thus the energy increases with temperature and decreases with decrease in temperature.


5 0
3 years ago
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