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On a balance you weight out 3.00 g of sodium dichromate,
Second opinion] On a balance you weight out 3.00 g of sodium dichromate, Na2Cr2O7? Can you calculate the number of oxygen atoms in the sample?… read more
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A 50.51 g sample of a compound made from iron and oxygen is
A 50.51 g sample of a compound made from iron and oxygen is decomposed. Analysis of the products showed that 35.33 g of iron atoms were produced. What is the empirical formula of this compound?For exa… read more
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A white-green solid contains 37.4% F by mass, and the rest
A white-green solid contains 37.4% F by mass, and the rest is copper. Enter the empirical formula of this compound in Cu#F# *****For example, A2B3 would be entered as A2B3.… read more
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Calculate the average molar mass for each of the following
Calculate the average molar mass for each of the following covalent and ionic compounds. Round your final answer to one (1) decimal place.… read more
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Ethylene glycol, the substance in automobile antifreeze, is
Ethylene glycol, the substance in automobile antifreeze, is 38.7% carbon, 9.7% hydrogen, and 51.6 % oxygen. If the molar mass of ethylene glycol is 62.0 g/mol, determine its: a) empirical formula; and… read more
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A compound of carbon and hydrogen contains 82.62% C and has
A compound of carbon and hydrogen contains 82.62% C and has a molar mass of 58.1 g/mol. What is its molecular formula, if it is possible to calculate? (Use 12.0 g/mol as the molar mass of C and 1.01 a… read more
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Balanced equation 4AgCN(aq)+2H2O(l)---- 4Ag(s)+4HCN(g)+O2(g) If
Balanced equation: 4AgCN(aq)+2H2O(l)----> 4Ag(s)+4HCN(g)+O2(g) If I produced 2.3 grams of silver metal, how many grams of HCN did I produce?… read more
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(problem 1) what volume of water (in liters) must be added
(problem 1) what volume of water (in liters) must be added to 1.0M HCl to make 3 liters of 0.002 M HCl? (#2) a 100 ml aqueous solution of sodium bicarbonate is made by dissolving NaHCO3 into water. Wh… read more
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Compare and contrast ionic and molecular compounds. Be sure
Compare and contrast ionic and molecular compounds. Be sure to include at least two ways they are similar and two ways they are different. HO and H2O2 are examples of the empirical and molecular formu… read more
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1. Identify the following as empirical formulas or molecular
1. Identify the following as empirical formulas or molecular formulas and indicate any uncertainty with (?): (a) CH2O (b) C6H12O6 (c) NaCl (d) CH4 (e) F6 (f) CaF2 2. Calculate the formula weight for e… read more
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1. Which of the following will result in a chemical change
1. Which of the following will result in a chemical change? A. Melting ice to obtain water B. Evaporating alcohol into vapor C. Drying wood in a shed D. Burning coal in a furnace 2. A salt is obtained… read more
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-------------------------------------------------------------------------------- Exam
-------------------------------------------------------------------------------- Examination Number 00709400 CHEMISTRY -------------------------------------------------------------------------------- … read more
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Calcuate the empirical formula for compounds with the ...
Calcuate the empirical formula for compounds with the following percentage composition a) 44.9% potassium, 18.4% sulfur, 36.7% oxygen? b) If 3.862 g of a compound containing silver and oxygen is heate… read more
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For each of the binary (two elements) compounds look at the ...
For each of the binary (2 elements) compounds look at the formula and classify each of the 2 elements present as metal or nonmetal. Then tell if the compound is an ionic compound or a molecular compou… read more
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identify the chemical symbols and their charges for the ...
identify the chemical symbols and their charges for the following elements and compounds: hydrogen, oxygen, chlorine, sodium, iron, calcium, nitrogen, magnesium, bicarbonate, potassium, carbon, ammoni… read more
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1. Which of the following will result in a chemical
1. Which of the following will result in a chemical change? A. Melting ice to obtain water B. Evaporating alcohol into vapor C. Drying wood in a shed D. Burning coal in a furnace 2. A salt is obtained… read more
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Need some help with my Chemistry 101 homework I. Name ...
Need some help with my Chemistry 101 homework: I. Name the following compounds. Use the prefix nomenclature system (i.e. carbon dioxide for CO2). a) N2O4 b) P2O5 c) P4O10 d) PCI6 II. Write the names f… read more
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(1) Which one of the following chemical equations is
(1) Which one of the following chemical equations is balanced? (a) 2NaCi+H2SO4 HCL+NaSO4 (b) NH3+H2O 2NH4+ H2O (c) KOH+H2SO4 KHSO+H2O (d) 2NA+S 2NaS (2)Which of the following is one way to prevent the… read more
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