Magnesium and iron are metallic elements. How does a mole of magnesium compare with a mole of iron?
2 answers:
Answer: d) They both have the same number of atoms.
Explanation:
A mole is defined as the amount of substance that contains Avogardro number of the substance. Avogadro's number is given by .
According to avogadro's law, 1 mole of every substance weighs equal to its molecular mass and contains avogadro's number
Thus 1 mole of magnesium and iron both contains particles.
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Answer:
The correct option is: A. carbon-12
Explanation:
The CNO cycle, the abbreviation for the carbon-nitrogen-oxygen cycle, is a catalytic cycle by which the stars produce helium from elemental hydrogen, via a series of nuclear fusion reactions.
This cycle involves the fusion of four protons with carbon (), nitrogen isotope (
), and oxygen isotope (
), to give an alpha particle and two electron neutrinos and positrons.
The reaction involves the regeneration of carbon () nucleus in the last step.
→
→
→
→
→
→
Answer:
290 grams
Explanation:
Let's begin by writing the balanced chemical equations:
Then we calculate the number of moles in 97g of propane.
n(propane)=
According to the balanced chemical equation, one mole of propane produces 3 moles of carbon dioxide. So the available number of moles of propane must be multiplied by three to work out the number of carbon dioxide produced.
n(carbon dioxide)= 2.1995mol*3 = 6.5985mol
mass(carbon dioxide) = moles * molar mass
= 6.5985 mol * 44.01 g/mol
= 290 grams