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3 years ago

To find the atomic mass of a particular atom you need to know

Chemistry

2 answers:

Andreyy893 years ago

5 0

You just need the number of protons and number of neutrons as the mass of eelctrons is negligible

Kipish [7]3 years ago

5 0

Answer:

C. the number of protons and neutrons

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A. What is the mass of 3.47x10^26 molecules of CuCl2?

Dafna11 [192]

Answer:

77460 g

Explanation:

To solve this problem first we convert molecules into moles, using Avogadro's number:

3.47x10²⁶ molecules ÷ 6.023x10²³ molecules/mol = 576.12 moles

Then we convert 576.12 CuCl₂ moles into grams, using its molar mass:

576.12 mol * 134.45 g/mol = 77460 g

So the answer is 77460 g, or 77.46 kg.

7 0

3 years ago

What is the molecular weight of one mole of H2O?

KatRina [158]

The molecular weight of one mole of H2O is 18.01528(33) g/mol.

8 0

3 years ago

What is the molarity if 6664 grams of boron iodide is dissolved in 5.25 liters of water?

Virty [35]

Answer:

3.24 mol/L

Explanation:

Given that:

mass of Boron triiodide = 6664 grams

molar mass of BI_3 = 391.52 g/mol

Recall that:

number of moles = mass/molar mass

∴

number of moles = 6664 g /391.52 g/mol

number of moles = 17.02 mol

Also;

Molarity = moles for solute/liter for solution

= 17.02 mol/5.25 L

= 3.24 mol/L

4 0

3 years ago

What is the scientific theory

Mrac [35]

Hello!

DescriptionA scientific theory is an explanation of an aspect of the natural world that can be repeatedly tested and verified in accordance with the scientific method, using accepted protocols of observation, measurement, and evaluation of results. Where possible, theories are tested under controlled conditions in an experiment.

8 0

3 years ago

Read 2 more answers

Classify the following compounds as having covalent or ionic bonds.

maw [93]

Answer:

Ionic -

barium chloride , potassium iodide , aluminum sulfide , strontium iodide .

Covalent -

sulfur trioxide , phosphorus trichloride

Explanation:

Covalent bond -

Covalent bond is the bond which is formed with the sharing of the electrons between the two atoms which are taking part in the bond. It is generally formed between the atoms with similar electronegativity values.

It is the bond which is generally occurs within non metals as they share electrons to complete their octet.

The difference in the electronegativity values of the atoms involving in a covalent bond must not exceed the value of 1.7 .

Ionic bond -

It refers to the type of bond between two atoms , where the difference between the electronegativity is very high ( more than 1.7 ) .

Most of the salts are ionic in nature , and as soon as dissolved in water , dissociates into its respective ions .

Hence , from the question ,

The ionic bonds are -

barium chloride , potassium iodide , aluminum sulfide , strontium iodide .

And the covalent bonds are -

sulfur trioxide , phosphorus trichloride

6 0

4 years ago