3 years ago

HCl, HC2H3O2, and H2SO4 are examples of

1 answer:

5 0

First of all, it must be noted that all these substances presented above are examples of compounds it that they are made of one or more elements that are present in fixed ratios. Then, it may also be noted that all of them contain H (hydrogen), this type of substances are ACIDS.

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How does modern periodic table explain the cause of periodicity.

pickupchik [31]

Answer:

The cause of periodicity in properties is the repetition of similar outer electronic configuration after certain regular intervals. For example, all the elements of group 1 i.e. alkali metals have a similar outer electronic configuration, ns1.

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3 years ago

How many moles are in 4.67 x 10^26 atoms of Iron?

TiliK225 [7]

Answer:

<h2>775.75 moles</h2>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

$n = \frac{N}{L} \\$