Answer:
2.83 × 10²² molecules.
Explanation:
Using the formula below to calculate the number of moles of Naphthalene:
mole = mass/molar mass
Where;
mass = 6.00g
Molar mass = 128.18 g/mol
mole = 6/128.18
mole = 0.047mol
To calculate the number of molecules of naphthalene in the mothballs, we multiply the number of moles (n) by Avagadro's number i.e.
number of molecule = n × 6.02 × 10^23
number of molecules = 0.047 × 6.02 × 10^23
= 0.283 × 10²³
= 2.83 × 10²² molecules.
Answer: Two grams of hydrogen react with one gram of oxygen to form two grams of water.
Isotopes are the atoms of the same element with same atomic number but different mass number isotopes of same element have same chemical properties due to same number of electrons atomic number of an atom is the number of electrons protons in it and mass number is the sum of protons
1 pound = 0.454 kg
First convert 980 lbs to kg
980 • 0.454 = 444.92
Round to 445.
He gets 10mg/kg of dewormer.
445•10 = 4450 mg.
Answer:
somewhere around 8.3 minutes