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3 years ago

Which among the materials have a varying amount of components are they compounds or mixtures

Chemistry

2 answers:

ruslelena [56]3 years ago

8 0

Answer:

Mixture Have variable composition and can be separated into component parts by physical methods. Mixtures contain more than one kind of molecule, and their properties depend on the relative amount of each component present in the mixture.

Elodia [21]3 years ago

7 0

Answer:

Matter can be broken down into two Zalo categories: pure substances and mixtures. Pure substances are further broken down into elements and compounds. Mixtures are physically combined structures that can be separated into their original components.

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Rus_ich [418]

What is the question?

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3 years ago

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If the density of a metal bar is 3.47 g/mL and volume is 30 mL, calculate the mass of the metal bar in grams (g). Show the steps

Hitman42 [59]

Answer:

$m=104.1g$

Explanation:

Hello,

In this case, considering that the density is considered as the quotient of the mass and volume:

$\rho =\frac{m}{V}$

We can easily compute the mass by solving for it as follows:

$m=V*\rho =30 mL*3.47g/mL\\\\m=104.1g$

Best regards.

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3 years ago

The mass of one mole of any substance is equal to the _____.

enyata [817]

Atomic mass in grams

3 0

3 years ago

Nuclei with the same mass number but different atomic numbers are called isobars. Consider Ca-40, Ca-41, K-41 and Ar-41. (a) Whi

SVETLANKA909090 [29]

Answer:

Part a:

Isobars: Ca-41, K-41 and Ar-41

Part b:

Number of proton

Part c:

Incorrect statement

Explanation:

Part a:

Nuclei with same mass number are called isobars.

Given:

Ca-40, Ca-41, K-41 and Ar-41

Ca-41, K-41 and Ar-41 have equal mass numbers, so these are isobars.

Part b:

Atomic number of Ca = 20

Atomic no. = Number of proton.

So, Ca-40 ans C-41 have same number of proton or in other words proton count is common in both.

Part c:

Number of neutrons in Ca-41

Atomic number = 20

Mass number = 41

Number of neutron = Mass number -atomic number

= 41 -20 = 21

Number of neutrons in K-41

Atomic number = 19

Mass number = 41

Number of neutron = Mass number -atomic number

= 41 -19 = 22

Number of neutrons in Ar-41

Atomic number = 18

Mass number = 41

Number of neutron = Mass number -atomic number

= 41 -18 = 23

So, the statement is incorrect.

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3 years ago

What is the total number of neutrons in an atom of O-18?<br> (1) 18 (3) 10<br> (2) 16 (4) 8

Julli [10]

The oxygen has 8 protons and 8 neutrons <span>in your nucleus

A = z + n

n = 18 - 8

n = 10 neutrons

Answer (3)

hope this helps!</span>

5 0

4 years ago

Which among the materials have a varying amount of components are they compounds or mixtures​

Which among the materials have a varying amount of components are they compounds or mixtures