3 years ago

Semi metals or noble gases have properties of both metals and non metals?

Chemistry

1 answer:

Papessa [141]3 years ago

5 0

Answer:

Yes they have properties of both.

Explanation:

8th grade science class.

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ale4655 [162]

Molar mass Li2CO3 = 73.89 g/mol
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% LI = 13.88/73.89*100 = 18.78% perfectly correct.

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Determine the number of moles within a sample of 10g of propane(C3H8). Round your answer to 2 decimal places with proper units.

a_sh-v [17]

Given :

10 gram sample of propane( C₂H₈ ).

To Find :

The number of moles of propane in given sample.

Solution :

Molecular mass of propane, M = (2 × 12) + ( 1 × 8 ) gram/mol

M = 32 gram/mol

We know, number of moles is given by :

Number of moles, n = m/M

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Therefore, number of moles in given sample is 0.3125 mol.

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3 years ago

a hammer has the volume of 11.5 cubic centimeters. it also has the mass of 500 grams. what is the hammer density

dsp73

Answer:

<h3>The answer is 43.48 g/cm³</h3>

Explanation:

The density of a substance can be found by using the formula

$density = \frac{mass}{volume} \\$

From the question

mass = 500 g

volume = 11.5 cm³

We have

$density = \frac{500}{11.5} \\ = 43.47826086...$

We have the final answer as

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3 years ago