Science review

अब Quizwiz के साथ अपने होमवर्क और परीक्षाओं को एस करें!

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


संबंधित स्टडी सेट्स

Environmental Science Final Exam

View Set

AP United States History: Chapter 21

View Set

neuro 3-18 -- visual system (clinical syndromes start on card 63)

View Set

Supply Chain Chapter 9:Logistics:warehousing, transportation, reverse logistics

View Set