Science review
A student preformed an experiment in which she measures a magnesium strip to be 0.980g she then places it in a crucible and heats it for five minutes until it's a power can you find molecular form or empirical form
Since it is a magnesium strip or pure magnesium you can find both
What is the percent of hydrogen in methane CH4
.25
Which of the following is the mass in grams of 4.25*10^3 mol of N2?
1.19*10^5
calculate the number of molecules in .3 moles of H^2O
1.2*10^23
How many Mg ions are in 3 moles of MgCl^2
1.81*10^24
what is the formula mass of MgSO4
120.37
A molecule of glucose is comprised of 6 atoms of carbon 12 of hydrogen and 6 of oxygen what is the molecular mass
180.16 amu
A three mole sample of K2S would have how many atoms of potassium?
3.62*10^24
How many moles are there in a sample containing 2.408*10^24 atoms of carbon
4.00
How many grams of silicon would there be in a sample that contained 9.99*10^52 atoms?
4.66*10^30
What is the formula mass of NaCl?
58.44
Given three moles of gold how many grams do you have?
591
how many Mg2+ ions are found in 1 mol of MgO
6.02*10^23
how many grams of NaCl are present in 11 moles
642.9
What is the molar mass of bromine in gas form
79.904
Describe the process of calculating the molar mass of Li2S?
Add the masses of 2 moles of lithium to one mole of sulfur Diatomic h, n,f, Cl, I Br Have no fear of ice cold beer
An unknown compound has the empirical formula CH if the molar mass is 26 what is the molecular formula?
C2H2
a molecule has been identified that contains three elements: carbon, hydrogen, and oxygen when the molecule is broken down the mas percentages are: c= 40.9% H+4.58% O=%4.5% what is the empirical formula for the molecule
C3h4o3
What is the molecular formula of glucose
C6H12O6
What is the empirical formula of glucose
CH2O
An unknown compound is determined to be composed of only carbon and hydrogen follows: C= 79.9% H=20.1% Write in empirical form
Ch3
The mass of one ___ is the molar mass of an element
mole of the element
The sum of the atomic masses of all the atoms in a formula for a covalent compound-
molecular mass