How many moles are co Type in answers without units, using scientific notation-include three decimal places (thousandths place) EXAMPLE-TYPE ANSWER LIKE THIS: 6.345e25 1.25 moles How many particles are contained in 20.0 mole of NaCl? * Type in answers without units, using scientific notation - include three decimal places (thousandths place) EXAMPLE-TYPE ANSWER LIKE THIS: 6.345e25 Your answer This is a required question Your answer This is a required question How many moles are contained in 6.759e23 particles of the following compound? * Type in answers without units, using scientific notation - include three decimal places (thousandths place) EXAMPLE - TYPE ANSWER LIKE THIS: 6.345e25 AI(CN), Your answer

How many moles are co Type in answers without units, using scientific notation-include three decimal places (thousandths place) EXAMPLE-TYPE ANSWER LIKE THIS: 6.345e25 1.25 moles How many particles are contained in 20.0 mole of NaCl? * Type in answers without units, using scientific notation - include three decimal places (thousandths place) EXAMPLE-TYPE ANSWER LIKE THIS: 6.345e25 Your answer This is a required question Your answer This is a required question How many moles are contained in 6.759e23 particles of the following compound? * Type in answers without units, using scientific notation - include three decimal places (thousandths place) EXAMPLE - TYPE ANSWER LIKE THIS: 6.345e25 AI(CN), Your answer

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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1. A student collected the following data during Lab: Mass of MgCO3 hydrate = 0.9987 g. Constant mass of anhydrous MgCO3 = 0.4831 g How many moles of water were in the MgCO3 hydrate? 2. A student uses gravimetric determination to find the water of hydration of a hydrated sample of cobalt (II) sulfate. The student’s sample contained 0.0098459 moles of anhydrous cobalt(II) sulfate (CoSO4) and 0.068921 moles of water (H2O). What is the formula of the cobalt(II) sulfate hydrate? 3. A student has a sample of CaSO4 hydrate and it weighs 0.4813 grams. He heats it strongly to drive off the water of hydration, and after subsequent heatings, the student finds the anhydrous compound has a constant mass of 0.3750 grams. Find the formula of the hydrate.
a hydrated CuSO4 salt was heated and thus dehydrated. Determine the % H2O by weight in the hydrated CuSO4 salt. SHOW WORK TO RECEIVE FULL CREDIT mass of empty dish 43.571 gmass of dish + hydrated salt 44.326 gmass of dish + dehydrated salt 44.054 g 4. Using the data found in question number 3, determine the empirical formula for the hydrated CuSO4salt. What is the chemical name of this dehydrated salt? 5. Suppose that after your second heating, you were impatient and did not wait until your porcelain evaporating dish to cool. Instead, you weighed it while it was still hot. How would this specifically affect the calculated percentage of water in the compound?
14. How many moles of CC are in each of the following quantities? A. 79 gg of CC Express your answer using two significant figures. B. 0.27 molemole of C2H6C2H6 Express your answer using two significant figures. C. 84 gg of CO2CO2 Express your answer using two significant figures.
Number of molecules in 2×10−6 mol CH3CH2OHCH3CH2OH. Express your answer using four significant figures.
Chloroethane, C2H5ClC2H5Cl, is used to diagnose dead tooth nerves. How many moles are in 29.0 gof chloroethane? Express your answer with the appropriate units. How many grams are in 1.50 moles of chloroethane? Express your answer with the appropriate units.
How many grams O in 221.8 g Fe(OH)g? Molar mass of Fe(OH)g is 106.867 Hint: 1 mole Fe(OH)3 has 3 mol O; use as a conversion factor Alternatively, use percent by mass Hint: do not need Avogadro's number Put the answer in the box in regular (non-scientific) notation. Use one figure past the decimal.
Molar mass of sucrose = 342.3 g/molΔT = 2.14 °Cqwater = 5.37 kJqcal = 0.899 kJDivide the mass of sucrose used by its molar mass to determine the number of moles. Be sure to convert the mass from units of milligrams to units of grams.
How many moles of NO2 are in 5.2x10^26 molecules of NO2 ? Round your answer to 1 decimal place. Answer: _______ units:______
How many moles of CO2 are in 2.33grams of CO2? Please express your answer in decimal form
How many grams O in 115.6 g Fe(OH)3? Molar mass of Fe(OH)y is 106.867 Hint: 1 mole Fe(OH) has 3 mol O; use as a conversion factor Alternatively, use percent by mass Hint: do not need Avogadro's number Put the answer in the box in regular (non-scientific) notation. Use one figure past the decimal.
For 1.28 moles of aspirin, C6H8O4, how many molecules of aspirin are present? (Avogadro's number = 6.02 x 1023)
How many grams O in 283.0 g Fe(OH)g? Molar mass of Fe(OH)g is 106.867 Hint: 1 mole Fe(OH)ghas 3 mol O; use as a conversion factor Alternatively, use percent by mass Hint: do not need Avogadro's number Put the answer in the box in regular (non-scientific) notation. Use one figure past the decimal.