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aliina [53]
3 years ago
15

Which phrase is the best definition of science?

Chemistry
1 answer:
kap26 [50]3 years ago
5 0

Answer:

Science is the information gathered through study.

Explanation:

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Which is the load<br>D.<br>A.<br>B.<br>C.<br>E.​
Paha777 [63]

Answer:

A.

Explanation:

In the case of a seesaw, the object at the top is the effort and the object at the bottom is the load.

6 0
3 years ago
What is the empirical formula for a compound that is 83.7% carbon and 16.3% hydrogen?
zubka84 [21]
Hello!

We use the amount in grams (mass ratio) based on the composition of the elements, see: (in 100 g solution)

C: 83.7% = 83,7 g 
H: 16.3% = 16.3 g 

Let us use the above mentioned data (in g) and values will be ​​converted to amount of substance (number of moles) by dividing by molecular mass (g / mol) each of the values, lets see:

C:  \dfrac{83.7\:\diagup\!\!\!\!\!g}{12\:\diagup\!\!\!\!\!g/mol} \approx 6.975\:mol

H: \dfrac{16.3\:\diagup\!\!\!\!\!g}{1\:\diagup\!\!\!\!\!g/mol} = 16.3\:mol

We note that the values ​​found above are not integers, so let's divide these values ​​by the smallest of them, so that the proportion is not changed, let's see:

C:  \dfrac{6.975}{6.975} = 1

H:  \dfrac{16.3}{6.975} \approx 2.3

Note: So the ratio in the smallest whole numbers of carbon to hydrogen is 3:7, t<span>hus, the minimum or empirical formula found for the compound will be:
</span>
\boxed{\boxed{C_3H_7}}\end{array}}\qquad\checkmark

I hope this helps. =)
8 0
3 years ago
Unknown # 29
sveticcg [70]

Answer:

I think it's a sulphate ion, because when you add hydrochloric acid to it it produces bubbles and when you add barium chloride it then produces a white precipitate.its formula is SO4

I hope this helps

8 0
3 years ago
1. Baking soda and vinegar combined *
Alina [70]

Answer:

dont know

Explanation:

4 0
3 years ago
An isotope undergoes radioactive decay by emitting radiation that has a –1 charge. What other characteristic does the radiation
MrRissso [65]
The radiation emitted is a beta particle with a -1 charge. <span>Beta particles have a </span><span>medium penetrating power. An emission of beta particles requires shielding because of the hazards it pose to humans. Thus, one characteristic of this radiation is that some shielding is required.</span>
7 0
3 years ago
Read 2 more answers
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