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7. A sample of impure sulfide ore weighs 155 grams and contains 18.5 grams of lead. Find the % of lead sulfide (PbS...
Lead can be extracted from a mineral call galena(PbS). An ore contains 3.4% galena by mass. How many kg of ore is neede...
Lead can be extracted from a mineral call galena(PbS). An ore contains 3.4% galena by mass. How many kg of ore is needed if you want to extract 100. grams of lead?
QUESTIONS (Show work for all problems involving calculations.) 1. Write the hydrate formula properly if the...
QUESTIONS (Show work for all problems involving calculations.) 1. Write the hydrate formula properly if the hydrate contains per molecule: a. One caicium, one sulfur, six oxygen and four hydrogen atoms RANO ItSwteR ప 2 H2U Cas Oq 2H2D b. One nickel, two nitrogen, twelve oxygen and twelve hydrogen atoms NINaaHo 2. Calculate the theoretical percent of water in: MASS Compoiena XIDO a. Na,co, 10H,0 Nazxa489 TOTNL WAleR 0880000-63.0% MASS WATER b. CoCl-6H,O Cor5845=S8.9 CIas35.4 70.89 HaO= 6x 18.0g-106.1g molAR...
A sample of He weighs 17.9 grams. Will a sample of Ne that contains the same...
A sample of He weighs 17.9 grams. Will a sample of Ne that contains the same number of atoms weigh more or less than 17.9 grams? (more, less): Calculate the mass of a sample of Ne that contains the same number of atoms. grams of Ne
A sample of Ca weighs 59.2 grams. Will a sample of Sr that contains the same...
A sample of Ca weighs 59.2
grams. Will a sample of Sr that contains the same
number of atoms weigh more or less than 59.2
grams? (more, less):
Calculate the mass of a sample of Sr that
contains the same number of atoms.
explain please
ex
LUULE POI L UCU 101 LJ 4us . A sample of Ca weighs 59.2 grams. Will a sample of Sr that contains the same number of atoms weigh more or less than 59.2 grams?...
A sample of ore containing manganese weighed 1.2354 grams. This sample was heated in a solution...
A sample of ore containing manganese weighed 1.2354 grams. This sample was heated in a solution of nitric acid, which dissolved the manganese ion producing manganese(III) nitrate [Mn(NO3)3]. The acidity of the solution was adjusted, and hydrogen sulfide gas was bubbled into the solution producing 0.2876 grams of manganese(III) sulfide [Mn2S3]. What is the percentage of manganese in the original sample?
3 3. A student performs a crystallization on an impure sample of biphenyl. The sample weighs...
3
3. A student performs a crystallization on an impure sample of biphenyl. The sample weighs 0.5 g and contains about 5% impurity. Based on his knowledge of solubility, the student de- cides to use benzene as the solvent. After crystallization, the crystals are dried and the final weight is found to be 0.02 g. Assume that all steps in the crystallization are performed cor- rectly, there are no spills, and the student lost very little solid on any glassware...
An ore sample weighs 15.60N in air. When the sample is suspended by a light cord...
An ore sample weighs 15.60N in air. When the sample is suspended by a light cord and totally immersed in water, the tension in the cord is 11.90N . Part A Find the total volume of the sample. Part B Find the density of the sample.
suppose an ore sample contains 10.0 impurity in addition to a mixture of cus and cu2s....
suppose an ore sample contains 10.0 impurity in addition to a
mixture of cus and cu2s. Heating 100.0g of the mixture produces
76.2g of copper metal with a purity of 90.4%. What is the weight
percent of cus of the ore? The percent of cu2s?
Copper metal can be prepared by roasting copper ore, which can contain cuprite (CuzS) and copper(II) sulfide. Cu,S(s) + O2(g) + 2 Cu(s) + SO2(E) CuS(s) + O2(g) + Cu(s) + S02 (8) Suppose an...
7. Consider a 100.0 grams of ammonium sulfide (10 points) (a) Write the Chemical formula of...
7. Consider a 100.0 grams of ammonium sulfide (10 points) (a) Write the Chemical formula of ammonium sulfide: (NH4)2S (b) What is the molar mass of ammonium sulfide: (c) Find the moles of the compound (formula units) present in 100.0 grams of ammonium sulfide: (d) Find the moles of ammonium ions present in 100.0 grams of ammonium sulfide: (e) Find the moles of hydrogen atoms present in 100.0 grams of ammonium sulfide:
7. Consider a 100.0 grams of ammonium sulfide (10 points). (a) Write the Chemical formula of...
7. Consider a 100.0 grams of ammonium sulfide (10 points). (a) Write the Chemical formula of ammonium sulfide: emical formula of ammonium sulfide: NH4t (b) What is the molar mass of ammonium sulfide: (C) Find the moles of the compound (formula units present in 100.0 grams of ammonium sulfide: (d) Find the moles of ammonium ions present in 100.0 grams of ammonium sulfide: (e) Find the moles of hydrogen atoms present in 100.0 grams of ammonium sulfide: 8. Broader Application-Inquiry...
QUESTIONS (Show work for all problems involving calculations.) 1. Write the hydrate formula properly if the hydrate contains per molecule: a. One caicium, one sulfur, six oxygen and four hydrogen atoms RANO ItSwteR ప 2 H2U Cas Oq 2H2D b. One nickel, two nitrogen, twelve oxygen and twelve hydrogen atoms NINaaHo 2. Calculate the theoretical percent of water in: MASS Compoiena XIDO a. Na,co, 10H,0 Nazxa489 TOTNL WAleR 0880000-63.0% MASS WATER b. CoCl-6H,O Cor5845=S8.9 CIas35.4 70.89 HaO= 6x 18.0g-106.1g molAR...
A sample of Ca weighs 59.2
grams. Will a sample of Sr that contains the same
number of atoms weigh more or less than 59.2
grams? (more, less):
Calculate the mass of a sample of Sr that
contains the same number of atoms.
explain please
ex
LUULE POI L UCU 101 LJ 4us . A sample of Ca weighs 59.2 grams. Will a sample of Sr that contains the same number of atoms weigh more or less than 59.2 grams?...
3
3. A student performs a crystallization on an impure sample of biphenyl. The sample weighs 0.5 g and contains about 5% impurity. Based on his knowledge of solubility, the student de- cides to use benzene as the solvent. After crystallization, the crystals are dried and the final weight is found to be 0.02 g. Assume that all steps in the crystallization are performed cor- rectly, there are no spills, and the student lost very little solid on any glassware...
suppose an ore sample contains 10.0 impurity in addition to a
mixture of cus and cu2s. Heating 100.0g of the mixture produces
76.2g of copper metal with a purity of 90.4%. What is the weight
percent of cus of the ore? The percent of cu2s?
Copper metal can be prepared by roasting copper ore, which can contain cuprite (CuzS) and copper(II) sulfide. Cu,S(s) + O2(g) + 2 Cu(s) + SO2(E) CuS(s) + O2(g) + Cu(s) + S02 (8) Suppose an...
7. Consider a 100.0 grams of ammonium sulfide (10 points) (a) Write the Chemical formula of ammonium sulfide: (NH4)2S (b) What is the molar mass of ammonium sulfide: (c) Find the moles of the compound (formula units) present in 100.0 grams of ammonium sulfide: (d) Find the moles of ammonium ions present in 100.0 grams of ammonium sulfide: (e) Find the moles of hydrogen atoms present in 100.0 grams of ammonium sulfide:
7. Consider a 100.0 grams of ammonium sulfide (10 points). (a) Write the Chemical formula of ammonium sulfide: emical formula of ammonium sulfide: NH4t (b) What is the molar mass of ammonium sulfide: (C) Find the moles of the compound (formula units present in 100.0 grams of ammonium sulfide: (d) Find the moles of ammonium ions present in 100.0 grams of ammonium sulfide: (e) Find the moles of hydrogen atoms present in 100.0 grams of ammonium sulfide: 8. Broader Application-Inquiry...
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