How many molecules are in each sample? 19 g C6H12O6 Express your answer using two significant figures

Make the following conversions: 1. 62.13 kg of Al to moles 2. 0.0235 moles of sugar, C,H,,O,, to grams 22 3. 12.54 grams of Cu to atoms 4. 15.00 mL of water to moles (density of water = 0.998 g/ mL) %3D 5. 3.005 X 10 21 atoms of Zn to grams

A 0.732 g mixture of methane, CH4, and ethane, C2H6, is burned, yielding 2.046 g of CO2. What is the percentage by mass of CH4 in the mixture? Enter your answer with 2 significant digits.

Calculate the mass in grams of each sample. 9.27×1019 CH4 molecules Express your answer using three significant figures.

Part A: How many atoms of hydrogen does it contain?         Express your answer using four significant figures.   Part B: How many molecules of glucose does it contain?         Express your answer using four significant figures.   Part C: How many moles of glucose does it contain?         Express your answer using four significant figures.   Part D: What is the mass of this sample in grams?         Express your answer using four significant figures.

In doing the experiment, a student calculated the mass of chlorine in the compound to be 1.133 g.  How many moles (mol) of chlorine are in the compound? Include the unit and five decimal places in your answer.

The chemical formula for potassium bromide is KBr. A chemist determined by measurements that 0.070 moles of potassium bromide participate in a chemical reaction. Calculate the mass of potassium bromide that participates. Round your answer to 2 significant digits.

What is the mass of 3.90 x 1021 formula units of KBr? Answer in standard notation to three significant figures.

Butyric acid, C4H8O2, is a compound found in many fats and oils.  A 129.6 g sample of butyric acid is how many moles of butyric acid? Report the answer to 3 significant figures.

The mole is a counting number that allows scientists to describe how individual molecules and atomsreact. If one mole of atoms or molecules is equal to 6.022 × 1023 atoms or molecules, how many moleculesare in a 23.45 g sample of copper (II) hydroxide, Cu(OH)2? (MM of Cu(OH)2 is 97.562 g/mol) Expressyour answer to the correct number of significant figures and you must show all work in the form ofdimensional analysis as shown in Lesson 4. You must solve the problems as they are taught in the course.     4.2 Counting particles of matter.  Grams to moles of Copper Hydroxide to molecules of Copper Hydroxide.