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3 years ago

In sience is copper a element or not a element

Chemistry

1 answer:

sukhopar [10]3 years ago

7 0

Answer:

a element

Explanation:

In science copper is a element. It is one of the transition metals found on the periodic table of elements.

Elements are distinct substances that cannot be split-up into simpler substances. Such substances consist of one kind of atom.

There are over a hundred elements that are known till date.

Each elements combines to form a compound

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3 years ago

determine the molecular formula of the compound with an empirical formula of CH and a molar mass of 78.110g/mol

Vlada [557]

Answer:

$C_{6} H_{6}$

Explanation:

First, find the mass of empirical formula, CH. 12.01 g/mol is for carbon, and 1.008 g/mol is for hydrogen. 12.01+1.008=13.018 G/mol CH. Divide 78.110 G/mol by 13.018 g/mol. You get approximately 6. Multiply that by the subscript of each element. 6(CH)=

$C_{6} H_{6}$

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3 years ago

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Answer:

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2 years ago

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Nookie1986 [14]

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3 years ago

How many moles are 4.20 * 10 ^ 25 atoms of Ca?

aleksandr82 [10.1K]

Answer:

~69.744 moles of Ca

Explanation:

Using Avogadro's constant , we know that:

1 mole = 6.022 x 10^23 atoms

S0, the number of moles in 4.20 x 10^25 atoms of Ca:

=(4.20 x 10^25 x 1 )/(6.022 x 10^23)

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Q2:How many atoms are in 0.35 moles of oxygen?

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S0, the number of atoms in 0.35 moles of oxygen:

=[0.35 x (6.022 x 10^23)]

=2.1077 x 10^23 atoms of Oxygen

Hope it helps:)

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3 years ago