3 years ago

Physical Science

Chemistry

1 answer:

gizmo_the_mogwai [7]3 years ago

5 0

Answer:

Explanation:

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The molecular weight of table salt, NaCl, is 58.5 g/mol. A tablespoon of salt weighs 6.37 grams. Calculate the number of moles o

cestrela7 [59]

Answer:

The number of moles of salt in one tablespoon is = 0.11 mole

Grams cancel each other.

Explanation:

Moles : It is the unit of quantity . It is the mass of the substance present in exactly 12g of C-12.

$moles=\frac{given\ mass}{Molar\ mass}$

Moles Calculation:

Given mass = 6.37 gram

Molar mass = 58.5 g/mol

$moles=\frac{6.37}{58.5}$

= 0.1088

= 0.11 mole

Units calculation

$moles=\frac{given\ mass}{Molar\ mass}$

$moles=\frac{g}{g/mole}$

$moles=\frac{g}{g}\times mole$

g ang g cancels each other

moles = moles

Hence unit = gram (g ) cancel each other.

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If a solution has a pH of 2, what is the hydroxide ion concentration?

murzikaleks [220]

Answer:

Explanation:

14=pH + pOH

pOH= 14 - 2

pOH= 12

pOH= -log[OH]

[OH]= 10^-12

=1×10^-12

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1 year ago

A chemical reaction is shown.

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Answer:

The coefficient that needs to be placed in front of the products is 2

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What is the charge of NH3?

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The ammonia or NH3 molecule is a neutral molecule therefore it has a zero net charge. Nitrogen can covalently bond to three other atoms where as hydrogen can covalently bond to one other atom. In this case, the bonds are stable by sharing all the valence electrons of atoms leaving no charge.

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4 years ago

(Please Help)

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Answer:

Explanation:

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