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3 years ago

Why can different numbers of metal and monkeys atoms create ionic bonds together?

Chemistry

1 answer:

Lerok [7]3 years ago

3 0

Answer:

i'm assuming you meant to say nonmetal atoms... in an ionic bond, electrons from the metal are transferred to the nonmetal. The reason why different numbers of metal and nonmetal atoms can combine is so their charges cancel out. take CaCl2 for example. There are two chlorine atoms for every calcium atom. If it was just CaCl, the charges wouldn't cancel out since calcium has a charge of 2+ and chlorine has a charge of 1-. Therefore to balance the compound, you need two chlorines.

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How do you balance this?

ad-work [718]

Weigh them both and there you go

8 0

3 years ago

An unknown material has a mass of 5.75 g and a volume of 7.5 cm3.

Shtirlitz [24]

Hey there!:

Mass = 5.75 g

Volume = 7.5 cm³

Therefore:

Density = mass / volume

D = 5.75 / 7.5

D = 0.7 g/cm³

Answer C

Hope that helps!

3 0

3 years ago

1. A student determines the density of water to be 0.966g/ml at a

lions [1.4K]

Answer:

The percentage error in the measurement is 2.4% 

Explanation:

The measurement made by the student is $0.966 g/cm^3$ .

But the actual value of density is $0.943 g/cm^3$

The formula to calculate percentage error is

percentage error = $\frac{(measured \ value-actual \ value)}{(actual \ value)} \times 100$

Hence percentage error in this case is given by

Percentage error = $\frac{(0.966-0.943)}{0.943} \times 100$

= $\frac{0.023}{0.943} \times 100=2.4%$

A physical quantities value will be determines by various quantities. If errors are made in measuring any of these quantities there will be error in the measurement of the final physical quantity as well.

Here density of a substance is a derived quantity determined by measuring mass and volume of that substance. If errors are made in mass and volume measurements the density value will also be erroneous.

4 0

3 years ago

Identify the term that matches each definition.

Katen [24]

Answer:

Explanation:

The front vent of a fume hood that assists and maintain proper air circulation is Airfoil

The horizontal flat surface area of the fume hood where experiments are being carried out is Work Surface.

The main characteristics which demonstrate and describes how substances evaporate rapidly and readily into the thin air while producing a huge amount of vapor is known as Volatile

In front of the fume hood, lies the glass panel whose main purpose is to shield the user from the hazardous substance. This glass panel is known as the Sash.

6 0

3 years ago

Why do elements undergo chemical reactions?

DaniilM [7]

Answer:

They have to

Explanation:

It occurs when 2 or more molecules interact and their bonds change

6 0

3 years ago