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3 years ago

Hydrogen (H) and Beryllium (Be) are members of the same a Group b Period c Neither

Chemistry

2 answers:

Solnce55 [7]3 years ago

3 0

Answer:

C. Neither

Explanation:

According to the periodic table, Hydrogen is in group 1 and period 1. Beryllium is in group 2, period 2.

Olenka [21]3 years ago

3 0

Its, the word c) neither

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Answer:

Ethanol

Explanation:

2 C atoms and a single OH group.

Formula: C2H5OH

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3 years ago

Can isotopes have different atomic numbers

Tpy6a [65]

Answer:

Explanation:

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All of the following institutions awards certificates except: a.) Community college b.) liberal arts college c. Junior college d

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Except B, Liberal Arts College

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3 years ago

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How many atoms are in the 1.5 moles of tin atoms?

Anastasy [175]

Answer:

option C = 9.0 x 10²³ atoms

Explanation:

Data Given:

no. of moles of tin (Sn) atoms = 1.5 moles

no. of tin (Sn) atoms = ?

Solution:

Formula used to find number of atoms

no. of moles = no. of atoms / Avogadro's number

Rearrange the above equation:

no. of atoms = no. of moles x Avogadro's number . . . . . . (1)

Where

Avogadro's number = 6.022 x 10²³

Put values in equation 1

no. of atoms = 1.5 x 6.022 x 10²³

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3 years ago

Calculate the number of moles equivalent to 12.7 gram of iodine molecule

Alexus [3.1K]

$\LARGE{ \boxed{ \purple{ \rm{Answer}}}}$

☃️ Chemical formulae ➝ $\sf{I_2}$

How to find?

For solving this question, We need to know how to find moles of solution or any substance if a certain weight is given.

$\boxed{ \sf{No. \: of \: moles = \frac{Given \: weight}{Molecular \: weight} }}$

Solution:

❍ Molecular weight of $\sf{I_2}$

= 2 × 126.90

= 253.80

= 254 (approx.)

❍ Given weight: 12.7

Then, no. of moles,

⇛ No. of moles = 12.7 / 254

⇛ No. of moles = 0.05 moles

⚘ No. of moles of Iodine molecule in the given weight = 0.05 moles

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3 years ago

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