What is the percent of NaOH by mass for 120 g of NaOH in 1000 g of water?

Q: How many formula units of MgBr, are in 18.91 g?

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Q: How many moles are in 78.9g of HCl?

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Q: What is the percent by mass of lithium in Li,O?

A: Percent by mass = (mass of Li/mass of Li2O) × 100%

Q: what is the molar mass of CuSO4 * 5H2O? what is the percent water in the compound?

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Q: How many moles are in 12.01g of sodium nitrite?

A: No.  Of moles = mass of sodium nitrite/Molecular mass of sodium nitrite n = 12.01/68.9953 n = 0.174…

Q: The percent by mass of copper(I) in CuCH3COO is?

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Q: How many molecules are in 502.1 g of LIF?

A: Mass of LIF = 502.1 g Molecular weight = 25.939 g/mol Molecule= ?

Q: What is the percent by mass of hydrogen in sulfuric acid

A: Molar Mass of H = 1 g/mol Molar mass of H2SO4 = 98 g/mol

Q: What is the percent by mass of magnesium in MgO?

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Q: Determine the mass percent in the hydrate

A: A hydrаte  is  а  substаnсe  thаt  соntаins  wаter  оr  its  соnstituent  elements in the physical…

Q: How many molecules are in 5.6g of H2O?

A: Mass = 5.6 g Molar mass of water molecule = 18.01528 g/mol

Q: A bottle of a tile cleanser contains 135 g of HCl and 775 g of water. What is the percent by mass of…

A: Generally the mass percent is determined by using following expression.

Q: 1. The formula for ibuprofen is C13H1802. How many moles of ibuprofen are present in 250.0-mg…

A: Here, we can answer only the first question which allows us to determine the number of moles of…

Q: How many cations are in 20.0g of Sodium pnosphate?

A: The formula of sodium phosphate is Na3PO4 Given: weight of sodium phosphate = 20 g

Q: The percent by mass of calcium in CaI2 is  ?????%.

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Q: How many moles are in 16.7 gg of allyl sulfide?

A: The chemical formula of allyl sulfide is (C3H5)2S. Molar mass of allyl sulfide = 2×{(3×12)+(5×1)} +…

Q: How many grams of ferrous sulphate (anhydrous) is equivalent to 1.2g of ferrous sulphate…

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Q: The number of formula units in 2.5x10-4 g of magnesium nitrate

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Q: 2.49E-1 moles of nitrogen is equivalent to how many molecules?

A: 1 mole of any substance (atoms, molecules or ions) contains Avogadro's  number of atoms, molecules…

Q: What is the percent (by mass) of oxygen in citric acid, C6H8O7.

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Q: Which molecule has the highest percent by mass of hydrogen?

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Q: how many moles of Kr are contained in 398 mg Kr?

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Q: How many hydrogen atoms are in 1.0kg of water?

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Q: A 15.6 g sample of magnesium carbonate contains 3.2 g of magnesium. What is the percent Magnesium in…

A: Solution stoichiometry is mainly based on the calculation of moles and volumes. These two values are…

Q: How many moles are in 16 g of NaOH?

A: Given that : Mass of NaOH = 16 g Molar mass of NaOH is 40 g/mol We have to calculate the number of…

Q: How many moles of water, H2O, are present in 75.0 g of H2O?

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Q: The percent by mass of cobalt(III) in CoI3 is %.

A: Compound = CoI3 Molar mass of Co = 59.0g/mol Molar mass of I = 127g/mol Molar mass of CoI3 =…

Q: 1. How many grams of water (H20) are there in 2 mol of water? 1 mol H20 = g (round to hundredth)

A: atomic mass of H = 1 g/mol atomic mass of O = 16 g /mol 1 mol H2O =  2 x1 + 16 = 18  g H2O

Q: Determine the percent ammonia, NH3, in Co(NH³) 6C1, to four significant figures.

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Q: How many moles is 55 g of NaCl?

A: Answer :- moles - It is a unit to measure an amount of a substance. The general formula to calculate…

Q: How many 325 mg tablets of aspirin are required to prepare 30 tablets of 10 grains?

A: Here we need to determine the number of 325 mg tablets required to prepare 30 tablets having 10…

Q: What is the percent by mass of oxygen in aspirin (C₉H₈O₄)?

A: The molecular weight of aspirin (C9H8O4) is  (12×9+1×8+16×4)=180 gm/mol The oxygen present in…

Q: How many moles are in 1.29g of NaCl ?

A:

Q: How many water molecules are in a block of ice containing 1.50 mol of water (H2O)?

A: Given : Moles of water i.e H2O = 1.50 mol

Q: 4. ocean water contains 3.4% sodium chloride by mass. How much salt can be obtained from 346.8 g of…

A: Given: Percentage of NaCl= 3.4% Mass of sea water= 346.8g To find: The mass of salt

Q: Four moles of hydrogen sulfide, H2S, would consist of how many molecules?

A: It is known fact that 1 mole of a substance is equals to 6.022×1023 atoms or molecules. Using this…

Q: How many moles of NaCl are in 87.1 grams of NaCl?

A: Answer :-  Moles of NaCl present in 87.1 grams of NaCl = 1.5 mol.

Q: How many moles are in 46.0g of CaO?

A: mole = mass / molar mass

Q: What are the number of moles in 34 g of ammonia?

A:

Q: What is the percent composition by mass (to one decimal place) of copper in 80.0 kg of copper (2)…

A: Molar mass of Copper(II) pho sphate = 380.58 g/mol This implies; 380.58 g of Cu3(PO4)2 contains…

Q: How many grams of Na are present in a 15 g sample of NaCl?

A: The number of moles for a given chemical species can be defined as the ratio of mass to the molar…

Q: The percent by mass of copper(II) in Cu3(PO4)2 is %.

A: Introduction- The mass percent of any element is calculated by the ratio of mass of the element in…

Q: How many moles are in 90 g of HCl?

A: Given that : Mass of HCl = 90 g Molar mass of HCl = 36.46 g/mol We have to calculate the number of…

Q: HOw many moles of propylene( C3H6) are in 25.0g of the substance?

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

Q: How many molecules of water make up 5.7 moles?

A: A mole is the amount of a substance that contains 6.02*10^23 representative particle of that…

Q: what mass of ethanol and water would you need to make an 80.0g mixture containing equal number of…

A: Mass=No. of moles×molar mass⊙ molar mass of Ethanol CH3CH2OH=2×atomic⊙ mass of C+6×atomic mass of…

Q: What mass of ethanol and water would you need to make an 80.0 g mixture containing equal number of…

A:

Q: How many moles are in 9 g of H2O?

A: Mole represent quantity of fundamental particle like proton neutron and electron.

Q: Which has more molecules: 50 g of sodium nitrate or 50 g of sodium nitrite?

A: Given mass of sodium nitrate (NaNO3) = 50gMolecular mass of NaNO3= 84.995 g/molNumber of moles of…

Q: What is the number of moles in 2L of water?

A: Given  Volume of H2O = 2L = 2000 mL We know that , Density of water = 1g/mL We also know that,…

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.