2 years ago

1. A charged group of covalently bonded atoms is known as

Chemistry

1 answer:

katrin2010 [14]2 years ago

7 0

Its known as covalently bonded atoms

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4. One gram of of ............... contains one type of atoms. a. iron b. ammonia c. hydrogen chloride d. water

patriot [66]

Answer: hydrogen chloride.

Explanation:

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2 years ago

A dunk tank holds 550,200 grams of water. How many moles of water are in the tank?

Novosadov [1.4K]

Answer:

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Explanation:

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2 years ago

Help can you match the answers to the definition PLZ Need this ASAP 30 points

Alchen [17]

Answer:

1-C

2-D

3-B

4-A

Explanation:

I think it is this if it is not , sorry!

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3 years ago

The cylinder of aluminum in class was approximately 13mm in circumference and 42mm in length. What would be it's approximate mas

Roman55 [17]

Answer:

Mass, m = 1.51 grams

Explanation:

It is given that,

The circumference of Aluminium cylinder, C = 13 mm = 1.3 cm

Length of the cylinder, h = 4.2 cm

We know that the density of the Aluminium is 2.7 g/cm³

Circumference, C = 2πr

$r=\dfrac{C}{2\pi}\\\\r=\dfrac{1.3}{2\pi}\\\\r=0.206\ cm$

Density is equal to mass per unit volume.

$d=\dfrac{m}{V}$

m is mass of the cylinder

V is the volume of the cylinder

$V=\pi r^2h\\\\V=\dfrac{22}{7}\times0.206^2\times 4.2\\\\V=0.5601\ cm^3$

So,

$m=d\times V\\\\m=2.7\times 0.5601\\\\m=1.51\ g$

So, the mass of the cylinder is 1.51 grams.

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3 years ago

State whether the error introduced by each of the following problems would result in a high or a low value for the Cu recovery o

vampirchik [111]

Answer:

Low value for copper recovery

Explanation:

The percentage recovery is obtained from;

Percent recovery = amount of substance you actually collected / amount of substance you were supposed to collect × 100

Note that the fact that some of the copper nitrate solution splashed out of the beaker means that some amount copper has been lost from the system. This loss of copper leads to a lower value of copper recovered from solution.

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2 years ago