3 years ago

An atom of aluminum has 13 protons and 14 neutrons. what is the atomic mass

Chemistry

1 answer:

PtichkaEL [24]3 years ago

5 0

A=P +N
A=13+14
A=27 this the answer

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Is the atomic number the lesser or the greater of the numbers for each atom on the periodic table?

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Lesser. atomic number means proton number

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3 years ago

Sam believes the rock is more denser than the pencil. He measured the mass of the rock to be 8.5 grams and volume to be 4.5mL. H

mezya [45]

Answer:

Rock

Explanation:

Let's calculate the density of each object:

Rock:

$Density = \frac{mass}{volume}=\frac{8.5\ g}{4.5\ mL}=1.9\ g/mL$

Pencil:

$Density = \frac{mass}{volume}=\frac{2.4\ g}{4.5\ mL}=0.53\ g/mL$

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What type of tide is produced when earth is directly between the sun and the moon?

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4 years ago

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m_a_m_a [10]

Answer:

The answer is "23765.4"

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$DP_n = \frac{\text{Mol.Wt Number Medium}}{\text{Monomer Unit Mol.Wt}}$

All monomer module, in this case, is propylene

Sunrise. Unit Wt = Mol. Propylene weight

$= \ Mol. \ Wt \ of \ C_3H_6\\\\= 3 \times 12.01 +6 \times 1.008 \ \ \frac{g}{mol}\\\\= 42.078 \frac{g}{mol}\\\\$

$DP_n = \frac{1000000}{42.078}\\\\$

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8 0

3 years ago

A 0.885 M solution of KBr whose initial volume is 82.5 mL has more water added until its concentration is 0.500 M. What is the n

4vir4ik [10]

Answer:

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Explanation:

Hello there!

In this case, since the equation for the calculation of dilutions is:

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Whereas M is the molarity and V the volume, because the final concentration is lower than the initial. Thus, since we are asked to calculate the final volume, we solve for V2 as follows:

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Best regards!

4 0

3 years ago