You determine the empirical formula of a compound to be CH3. In a separate experiment, you determine the molar mass of the compound to be 90.208 g/mol.  What is the molecular formula for this compound?     Question 3  When converting between grams and moles, it is necessary to use Avogadro's number.   Question 3 options:   True   False

Balance chemical equation given below. HoW much lithium nitride is produced when 20 g of lithium and 5 g of nitrogen combine to form lithium nitride, a component of advanced batteries? When the reaction is balanced with the least integers, what is the sum of the coefficients? (Hint: don't forget to add coefficient 1 if it is any.) Li + N2 → LizN (Hint: find a limiting reagent.) MM Li = 6.94 g/mol MM N2 = 28 g/mol MM LigN = 34.83 g/mol %3D Answer: mass(g) =

Given the equation below, 38.74 grams of LiOH and excess CO2, what mass of H2O can be produced? Round your answer to two digits after the decimal point. 2 LiOH + CO2 à Li2CO3 + H2O

MOLES/GRAMS/MOLECULES T06/S06 If a sample of HNO3 is found to contain 6.46 · 10-3 mol of H atoms how many moles of HNO3 molecules are present? Express your answer in scientific notation. Molar Mass (g/mol) HNO3 63.013 14.007 1.0080 15.999 N atom x 10 H atom O atom Avogadro's No. (mol*1) 6.022x1023

1. Complete the blanks in each row, with proper number of significant figures: Substance Molar mass, g/mol Mass in grams Number of moles Count of formula units ВаBrz 2.40 P2S5 0.034 Ni3(PO4)2 5.5 x 1025 CGH5OH 10

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LAB 8 Pre-Lab Questions portions of lab adapted from various online and reference sources 1. Fill in the missing parts of this chemical equation. Remember that a chemical with a dot in the middle is called a hydrate. The arrow means that heat will be applied, which will drive off the water from the hydrate. No physical states needed, but your final answer should be balanced. CuSO4.5H2O -> CUSO4 + 2. Calculate the molar mass of the hydrate ZnSO4.7H₂O. 3. A student took 4.92 g of hydrated magnesium sulfate crystals (MgSO4 xH₂O), but didn't write down how many water molecules were attached, hence "x." a. Write a balanced chemical equation that shows a decomposition of this molecule if we were to apply heat. No physical states needed, but your final answer should be balanced (you can use x in balancing). b. The student heated the hydrate. Once heating was complete, the dish had 2.40 g of dried magnesium sulfate. How much water in grams did the student drive off from heating? Show work. c.…

In this question below, what is the starting unit? How many molecules of carbon monoxide (CO) are needed to react with excess iron (III) oxide (Fe203) to produce 11.6 g of iron (Fe)? O g Fe203 O g co O g Fe O g Co2 O mole Fe203 O mol CO O mol Fe O mole CO2 Oparticles Fe203 O molecules cO Olatoms Fe molecules CO2

x WCJC: Single Sign-On to all you X ents.macmillanlearning.com/sac/7650575#/7650575/5/-1 ✪ Assignment Score: Question 6 of 14 > © Macmillan Learning 12 Ch 7 Homework: Mass Stoichiom X SUB 13.8% number of formula units: S What is the number of formula units in a 6.38 mol sample of NH4NO3? HI a Question 6 of 14 - Ch 7 Homewo X - Resources * SN hp Lytive Up? A Hint 77°F Mostly cle

Use the balanced equation, 2NO + O₂ 1 2 NO₂, to answer the following questions. Part 1 of 3 Determine the limiting reactant. Select the single best answer. Ⓒ84.0 g NO O 81.0 g 0₂ Part 2 of 3 Part: 2/3 How many moles of the product NO, form? Round your answer to 3 significant figures. 2.498 mol NO₂ Part 3 of 3 X Continue 0.8 Ś X