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3 years ago

Which statement best describes the model that shows a compound?

Chemistry

2 answers:

VashaNatasha [74]3 years ago

5 0

B is the.answer for this problem

kirza4 [7]3 years ago

4 0

Answer:

Explanation:

The definition of a compound, is a chemical substance containing two or more elements chemically bonded together.

Model X clearly shows a compound because there are many substances which have two elements chemically bonded to each other.

Model Y does not show a compound because although there are three different atoms, they are not chemically bonded together. This model would most likely represent a solution.

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find the volume of an item using a scale and waterA crown made of alloy of gold and silver has a volume of 60cm3and mass of 1050

KiRa [710]

Answer:

The mass of gold in crown is 960.61 g.And the volume of gold is $49.77 cm^3$ .

Explanation:

Density is defined as mass of the substance present in unit volume of the substance.

Mass of gold in an alloy of crown= m

Mass of silver in an alloy of crown = M

Volume gold in an alloy of crown= v

Volume of silver in an alloy of crown = V

Density of gold = $19.3 g/cm^3$

Density of silver = $10.5 g/cm^3$

Volume of the crown = $60 cm^3$

$60 cm^3=v+V$

$60 cm^3=\frac{m}{19.3 g/cm^3}+\frac{M}{10.5 g/cm^3}$ ..(1)

Mass of eh crown = 1050 g

$1050g =m+M$ ..(2)

Solving equation (1) and (2):

m = 960.61 g

M = 89.39 g

Volume of the gold = v = $\frac{960.61 g}{19.3 g/cm^3}=49.77 cm^3$

Volume of silver = V = $60 cm^3-v=60 cm63-49.77 cm63=10.23 cm^3$

The mass of gold in crown is 960.61 g.And the volume of gold is $49.77 cm^3$ .

4 0

3 years ago

If an element has two or more atoms with the same number of protons but different number of neutrons it is called what

Oksana_A [137]

It’s called an isotope which is an atom with the same number of protons but a different number of neutrons

8 0

2 years ago

Another word for "basic" is?

natita [175]

Answer: Fundamental, Key, vital, crucial

Explanation:

5 0

2 years ago

Read 2 more answers

Which pure substance is made of only one kind of atom?

aleksley [76]

Answer:

the answer is D i believe. i am not shure but im like 70% sure

7 0

3 years ago

What happens to an atom if it loses an electron?

jolli1 [7]

Answer:

When an atom loses electron(s) it will lose some of its negative charge and so becomes positively charged. A positive ion is formed where an atom has more protons than electrons. In the opposite case when an atom gains electron(s) it becomes negatively charged (more electrons than protons).

Explanation:

7 0

3 years ago