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xeze [42]
3 years ago
12

What are "representative elements"?

Chemistry
2 answers:
Mars2501 [29]3 years ago
8 0

Answer: c. elements in the same row of the periodic table

Explanation: It kind of represents a graph of the periodic table

GrogVix [38]3 years ago
4 0

Answer:

Elements in the tall columns of the periodic table

Explanation:

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jenyasd209 [6]

Answer: Mixture: Blood , Self raising flour,muesli ,dyes, milk, tea, air, bronze

Pure substance: Copper wire, distilled water, table salt, oxygen.

Explanation:

Mixture is a substance which is made up two or more number of compounds which chemically inactive and retain their distinct chemical properties.

Blood , Self raising flour,muesli ,dyes, milk, tea, air, bronze

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In an ecosystem, there are many factors that affect how many organisms can survive them. Which of the following is one of those
Free_Kalibri [48]
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3 years ago
Now that you have exercised, walked your
ASHA 777 [7]

Answer: The moles of melatonin are 0.000043

Explanation:

According to avogadro's law, 1 mole of every substance weighs equal to its molecular mass and contains avogadro's number 6.023\times 10^{23} of particles.

To calculate the moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}

Given mass of melatonin = 0.01 g

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Thus the moles of melatonin in 0.01 g are 0.000043

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Germanium is classified as a metalloid. 
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3 years ago
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