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2 years ago

Hello guys what is good! What are all the elements of the P block?

Chemistry

1 answer:

Ghella [55]2 years ago

6 0

boron, carbon, nitrogen, oxygen and flourine families in addition to the noble gases.

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also to answer the 'hello guys what is good!':nothin u?

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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

Water is heated to boiling and water vapor (steam) is released. Chemical change or physical change?

Vlad [161]

Physical because it is still H2O

6 0

3 years ago

During ______ the composition of a substance does not change

nignag [31]

During the Physical changes

6 0

3 years ago

What happens if you cross a heterozygous organism with a heterozygous organism?

maw [93]

If you cross a heterozygous organism with another heterozygous organism, pair two Tt and Tt. Below is a punnet square to show the result:

T t
T TT Tt
t Tt tt

This means that you have two heterozygous recessive and one homogenous dominant and one homogenous recessive.

5 0

3 years ago

Which expression can be used to calculate the density of a 129.5-gram sample of bronze that has a volume of 14.8 cubic centimete

PilotLPTM [1.2K]

Answer:

it would be like 30

Explanation:

just divide the gram by cubic

5 0

2 years ago