PROBLEM SOLVING IN MOLE CONCEPT Directions: Solve each of the following problems. Show detailed solutions for each item. What mass of azurite, Cu3(CO3)2(OH)2 would contain 900 grams of copper? The molecular weight of hemoglobin is about 65,000 g/mol. Hemoglobin contains 0.35% iron (Fe) by mass. How many iron atoms are in a hemoglobin molecule? A sample of compound contains 6.444 grams of boron (B) and 1.803 grams of hydrogen (H). If the molecular weight of the compound is 30.0 g, what is the molecular formula of the compound?

PROBLEM SOLVING IN MOLE CONCEPT Directions: Solve each of the following problems. Show detailed solutions for each item. What mass of azurite, Cu3(CO3)2(OH)2 would contain 900 grams of copper? The molecular weight of hemoglobin is about 65,000 g/mol. Hemoglobin contains 0.35% iron (Fe) by mass. How many iron atoms are in a hemoglobin molecule? A sample of compound contains 6.444 grams of boron (B) and 1.803 grams of hydrogen (H). If the molecular weight of the compound is 30.0 g, what is the molecular formula of the compound?

Chemistry by OpenStax (2015-05-04)

1st Edition

ISBN:9781938168390

Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser

Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser

Chapter3: Composition Of Substances And Solutions

Section: Chapter Questions

Problem 10E: Which contains the greatest number of moles of oxygen atoms: 1 mol of ethanol (C2H5OH), 1 mol of...

See similar textbooks

Similar questions

Mole problem (chemistry): Ethyl acetate, C4H8O2, is frequently used in nail polish remover.A typical bottle of nail polish remove contaisn about 2.5 mol of ethyl acetate. a) How many molecules are in the bottle of nail polish remover? b) How many atoms are in the bottle? c) How many carbon atoms ar ein the bottle?
Question 5 A) What is the answer to the following problem, reported to the correct number of significant figures? (8.000−7.009) / (10.00∗0.010000) A. 9.910 B. 9.91 C. 9.9 D. 0.9910 E. 0.99 B) Hydrates take the form: compound·nH2O. An unknown hydrate has a molar mass of 537 g/mol.If the anhydrate has a molar mass of 375. g/mol, what is the integer n in the hydrate. A. 5 B. 6 C. 7 D. 8 E. 97. C) Calculate the change in enthalpy for the following reaction: A + 3B→D ∆Hrxn=? Given: 3A + 12B→6C ∆Hrxn= 60.0 kJ 2B + 2D→4C ∆Hrxn= 60.0 kJ Express your answer in kJ. A. -20.0 kJ B. -10.0 kJ C. 0.0 kJ D. 10.0 kJ E. 20.0 kJ
Problem Ammonium carbonate is a white solid that decomposes with warming. It has many uses, for example, as a component in baking powder, fire extinguishers, and smelling salts.(a) How many formula units are in 41.6 g of ammonium carbonate?(b) How many O atoms are in this sample?Plan (a) We know the mass of compound (41.6 g) and need to find the number of formula units. we need the formula to find the amount (mol) and then multiply by Avogadro’s number to find the number of formula units. [The road map steps are for part (a).] (b) To find the number of O atoms, we multiply the number of formula units by the number of O atoms in one formula unit.
A 55-kg woman has 483.42 grams of hemoglobin (molar mass = 64,456 g/mol) in her blood. How many hemoglobin molecules is this?
1. What is the molecular mass (in AMU) and molar mass (in g mol-1) for chloroform (CHCI3) ?
Given 100 g-mol of molybdotellurate: 3(NH4)2O.2TeO3.6MoO3.10H2O, calculate: a) kg Hb) lb Tec) lb-atom Ted) Te atoms
1- The mass of black copper oxide in grams resulting from the thermal disintegration of J319 grams of copper sulfate The binary according to the equation below is equal to:
Transcribed Image Text:2. Consider the compound potassium hypochlorite. a. Write out the formula for potassium hypochlorite. b. Determine the molecular weight (molar mass) of potassium hypochlorite. c. Calculate the number of moles of potassium hypochlorite in 78.54 grams of the compound. d. Calculate the total number of atoms of oxygen in 78.54 grams of potassium hypochlorite. 3. Norepinephrine (C3H₁NO3) is the neurotransmitter responsible for your "flight or fight" response by increasing your alertness. How many oxygen atoms are there in 13.2 g of norepinephrine?
If you have a sample that is 60g and is known that it is 30%H. How many mols of H are there
Please answer questions 1 & 2 and show work. 1. Calculate the mass, in g, of chlorine in 25g of the chlorofluorocarbon CFCL3. 2. Calculate the emperical formula of a pure compound that contains 0.672 g Co, 0.569 g As, and 0.486 g O.
Use percent composition and molar mass to determine molecular formula. Close Problem Question Content Area Analysis of a compound of chlorine, oxygen and fluorine showed that it is 34.60% Cl and 46.85% O, with F accounting for the remainder. In a separate experiment, the molar mass of the compound was found to be 102.5 g/mol. Determine the molecular formula of the compound. Enter the elementsin the order Cl, O, F.
Which contains the greatest number of moles of oxygen atoms: 1 mol of ethanol (C2H5OH), 1 mol of formic acid (HCO2H), or 1 mol of water (H2O)? Explain why.