How much Na2Co3 is needed to produce 35g of Na2Co3?

0.33 moles

Explanation:

Given that,

Amount of moles of Na2CO3 (n) = ?

Mass of Na2CO3 in grams = 35g

For molar mass of Na2CO3, use the molar masses as follows:

Sodium, Na = 23g;

Carbon, C= 12g

Oxygen, O = 16g

Na2CO3 = (23g x 2) + 12g + (16g x 3g)

= 46g + 12g + 48g

= 106g/mol

Since, n = mass in grams / molar mass

n = 35g / 106g/mol

n = 0.33mole

Thus, 0.33 moles of Na2Co3 is needed to produce 35g of Na2Co3

for points guys

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

if it's not useful, feel free to report for mistake in answer.