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Anika [276]
4 years ago
10

Which substance is an example of an element?

Chemistry
2 answers:
kaheart [24]4 years ago
6 0

It is B. I took the test!!

Gnoma [55]4 years ago
4 0
Copper is an element. An element is a substance that is entirely made from one type of atom.
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State the location and the total charge of the protons in a Ni-64 atom.
blsea [12.9K]
Location = nucleus , 
and you can see the total charge on the number that written below the substance, which would be 28+ 

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Explanation:

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How many molecules of As4010 are in 6.2 mol of As4010?
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3 years ago
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For the reaction 2Fe + O2 > 2FeO, how many grams of iron oxide are produced from 5.00 moles of iron?
Greeley [361]

Answer:

359 grams FeO

Explanation:

To find how many grams FeO are produced, you need to use the moles of Fe, convert it to moles of FeO (using the mole-to-mole ratio from the equation), then convert the moles of FeO to grams (using the molar mass from the periodic table).

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5.00 moles Fe           2 moles FeO            71.845 grams
----------------------   x  ------------------------  x  ----------------------  = 359 grams FeO
                                   2 moles Fe               1 mole FeO

5 0
2 years ago
The mass numbers for two isotopes are unequal because they have different numbers of
SSSSS [86.1K]
The mass numbers for two isotopes are unequal because they have different numbers of NEUTRONS.

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4 years ago
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