Problem 7 ( . Magnesium reacted with hydrochloric acid to produce hydrogen in the equation: Mg(s) + 2HCI(aq) MgCl,(aq) + H,(g) The hydrogen gas was collected over water in a 5.00-L flask at 25.0°C. The total pressure in the flask was 760 torr and the pressure of water vapor at this temperature was 24 torr. What was the mass of magnesium, if the molar mass of magnesium is 24.3051 ? Enter your answer in mol the line provided with correct units and sig. figs.: Answer: _mmg

Q: Calculate the number of (a)nitrogen molecules (N2 molecules) (b)nitrogen atoms(N atoms) in 0.111g of…

A: Since 0.111 g of nitrogen gas will have moles = mass/molar mass molar mass of N2 = 28 g/mol Hence…

Q: It is estimated that we breathe around 5.0 x 1021 molecules of 0, in a single breath. What mass of…

A: Given: Molecules of O2 in a single breath = 5.0 × 1021. Molar mass of O2 = 32 g/mol

Q: If 1.00 g of gray zinc powder reacts with 0.49 g of yellow sulfur powder, what is the mass of the…

A: Given : Mass of gray zinc powder = 1.00 g Mass of  yellow sulfur powder = 0.49 g Mass of ZnS = ?

Q: What is the mass (in grams) of 0.263 moles of water?

A: Moles of water=0.263molTo find the mass of 0.263 moles of water (H2O), you can use the molar mass of…

Q: A sample of a mixture of oxalic acid, H2C2O4, and sodium chloride, NaCl, has a mass of 4.554 g. If a…

A:

Q: How many grams are in 8.96x1015 molecules of CO

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Q: What is the mass of 4.34  1027 hydrogen molecules?

A: Given: Number of hydrogen molecules =

Q: How many moles are there in a copper wire that was a mass 10.000 g?

A: Solution The number of moles AN exceedingly|in a very} given sample of an element/compound is…

Q: If after heating the reaction between magnesium and hydrochloric acid, the mass of the magnesium…

A: Given: The mass of the crucible = 34.2 g The mass of the magnesium chloride formed and crucible =…

Q: What is the volume of 9.30 moles of SiH,?

A: Given, Moles of SiH4 = 9.30 moles

Q: How many total atoms are in 33.3 g of copper(I) carbonate?

A: Given Mass of Cu2CO3 = 33.3 g To find Total no.of atoms in the given amount of Cu2CO3

Q: was the mass of O2 0.1691mole

A: In this question, we have to clear the doubt regarding the preceding question.

Q: What is the mass of 4.27 moles of lithium nitrate?

A: Mass = Number of moles x Molar mass Molecular formula: Ti(NO3)4 Molar mass of Ti(NO3)4 = 295.89…

Q: How many moles of oxygen gas are present if there are 4.35 x 1025 atoms of oxygen in the sample?

A: answer = 36.11 moles of oxygen gas.

Q: If 15.3 grams of chloriine react with 8.6 grams of calcium to form calcium chloride, what is the…

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Q: A 13.0-g sample of titanium reacts with oxygen to form 21.6 g of metal oxide. What is the empirical…

A: Given that  Mass of Titanium reacted = 13.0 g  Mass of metal oxide formed = 21.6 g  Empirical…

Q: If the reaction between zinc chloride and sodium phosphat produces 25.7 g of product, then what is…

A:

Q: What is the mass of carbon in grams found in one molecule of the compound C7H8O4?

A: The atomic mass of carbon is 12 g. Thus, the mass of one atom of carbon in the molecule is…

Q: A compound has the chemical formula SrX2, where X is an unknown nonmetal. The percent by mass of Sr…

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Q: Draw the Lewis electron-dot structures for these molecules, including resonance structures where…

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Q: What is the molecular mass of CH¿I? amu

A: Molecular mass is defined as the is the mass of a given molecule. The unit of molecular mass is amu…

Q: What would be the number of moles for calcium arbonate if it is  66.0 g T, also the mass.

A: Molar mass of calcium carbonate that is Caco3 is 100g/mol

Q: What is the percent by mass of carbon

A: Percent by mass = (mass of C/total mass of compound) × 100%

Q: If 1.23 x 1024 molecules of a substance have a mass of 68.2 g, what is the molar mass of the…

A: Given Data: The mass of the substance is 68.2 g.

Q: What mass of hydrogen gas H2 is present if there are 5.00E23 atoms of hydrogen?

A: Given: Atoms of hydrogen are 5.00×1023 To find: Mass of hydrogen gas

Q: osmium by mass. a) If you assume 100.0 g of the compound, what is the mass in grams of osmium that…

A: Since you have posted a question with multiple sub- parts, we will solve first three sub- parts for…

Q: Consider the reaction Part A CO (g) + H2O (g) = CO2 (g) + H2 (g) K. = 102 at 500 K What will be the…

A: Given: A reaction, CO(g)+H2O(g)⇌CO2(g)+H2(g) Kc=102 @ 500 K Concentration of CO=0.115 M…

Q: How many atoms of oxygen are in 12.99 g in nickel (II) nitrate?

A:

Q: 27.22 g of X combines with 84.10 g of Y to form XY. If the molar mass of X is 33.42 g mol–1, what is…

A: The mass of X is 27.22 g.The mass of Y is 84.10 g.The molar mass of X is 33.42 g.mol-1.The formula…

Q: What percent by mass of iron(II) phosphate is iron?

A: The molecular formula of Iron(II)phosphate is Fe3(PO4)2. Percentage by mass of any component can be…

Q: to

A: Mass of Material Can be calculated by multiplying with one atom weight with a number of atoms.

Q: How many milligrams are 3.2×1019 atoms of copper?

A:

Q: Chlorophyll has the chemical formula C55H72MgN4O5. Determine the molar mass of chlorophyll

A: Molecular Formula of Chlorophyll = C55H72MgN4O5

Q: What is the mass of 1.761 × 10^8 mol S? Answer in units of g.

A:

Q: What is the mass of 3.5 x 10^-3 molecules of copper (II) carbonate? Use correct significant figures…

A: Mole concept: The number of molecules or atoms present in the one mole of the substance is equal to…

Q: What is the mass ( in kilograms) of the average molecule of carbon dioxide?

A:

Q: What is an indicator? What is a buffer?

A: Indicators and buffers are the chemical substances which are used in chemistry for various purposes.

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.