Does the product formed during the combustion of magnesium in Test 6 (the ashy magnesium  oxide) to weigh more than, less than, or the same as the original piece of magnesium? Explain.

Q: E 0.379 mol of Cr

A:

Q: If 6.750 grams of lithium carbonate was used in the reaction, how many grams of carbon dioxide would…

A: The equation for the decomposition of lithium carbonate is as follows. Li2CO3 → Li2O + CO2 This is a…

Q: What mass of potassium phosphate is needed to form 300.49 grams of potassium bromide?

A: 1 mole of potassium phosphate formed 3 moles of potassium bromide.

Q: Determine the mass percentage of hydrogen in CH4  and ‍C2H6.

A:

Q: If 5.00 grams of MgNH4PO4•6H2O are ignited, how many grams of Mg2P2O7 would be formed?

A: Given that 5 g of MgNHPO4.6H2O is heated.

Q: What is the mass, in grams, of 9.94 x 104 molecules of methanol (CH, OH) ?

A: Given molecules of methanol is 9.94 x 1024 It is known that 1 mole of  methanol has 6.023 × 1023…

Q: Balance the chemical equation below using the smallest possible whole number stoichiometric…

A:

Q: Boron nitride reacts with iodine monofluoride in trichlorofluo- romethane at -30°C to produce pure…

A: Given Chemical Reaction is  BN  +  3 IF  → NI3  +  BF3  from the above chemical reaction  1 mole BN…

Q: 2. If you want to produce 85 g of silicon, how many grams of magnesium will you need? How many grams…

A: The chemical reaction that takes place between sand and magnesium metal to produce elemental silicon…

Q: If you react 5.2 grams of magnesium metals with 2.3 grams of copper (II) bromide, how many total…

A: Given : Mass of magnesium i.e Mg taken = 5.2 g And mass of copper (II) bromide i.e CuBr2 taken = 2.3…

Q: A sample of a compound is found to contain 40.0% carbon, 6.7% hydrogen, and 53.3% oxygen. What is th…

A: C: 40 % H : 6.7 % O : 53.3%

Q: What is the mass, in micro grams, of 8.9 x 10^15 atoms of cobalt?

A: The number of units present is the one mole of a substance is equal to 6.02214×1023 are termed as…

Q: A student conducts this synthesis. She starts with 7.3447 g of Fe(NH4)2(SO4)2 6H2O and isolates…

A: a. The number of moles of FeC2O4 is calculated as,

Q: What would be the mass, in grams, of an NO2 sample in which 100 billion (1.00 X 10 11) moleculesare…

A: The number of molecules of NO2 sample is 1.00×1011.   The formula to calculate the number of…

Q: How many vanadium atoms are contained in 158 kg of vanadium?

A: 1 mole of substance contains 6.022 x 1023 atom.

Q: Dynamite consists of nitroglycerine mixed with diatomaceous earth or cellulose. What is another name…

A: Dynamite consists of nitroglycerine mixed with diatomaceous earth or cellulose Another name of…

Q: 12) How many grams of hydrogen are in 22.9 g of C6H12O6?

A: Given information,     Mass of glucose is 22.9 g. There are six moles (or 12 atoms) of hydrogen in…

Q: Iodine is made by the following reaction 2 NaIO3 (aq) + 5 NaHSO3 (aq) → 3 NaHSO4 (aq) + 2 Naz SO4…

A: 2 NaIO3(aq) + 5 NaHSO3(aq) →3 NaHSO4(aq)+2Na2SO4 (aq)+…

Q: The 2-step process for melamine is: CO(NH2)2(l)→HNCO(l)+NH3(g) 6HNCO(l)→C3N3(NH2)3(l)+3CO2(g)…

A: Given,Mass of urea, CO(NH2)2 = 189.0 kg = 189000 g   (1 kg = 1000 g)Moles of urea can be calculated…

Q: 1.064g of an organic compound containing carbon and hydrogen was analyzed by combustion analysis and…

A:

Q: Fill in the blanks.

A: The balanced chemical equation for this reaction is: NH3 + Br2 + H2O → NH4Br + HOBrNH3 is…

Q: Balance the combustion of C12H22O11

A: The molecule given is C12H22O11  Hence in combustion of C12H22O11 , the compound C12H22O11 will…

Q: An aluminum plant produces 60 million kg of aluminum per year. How much aluminum oxide is required?

A: The amount of Aluminum oxide required to produce 60 million aluminum per year is given below

Q: How much would 2.4 x 1024 molecules of N2O5 weigh?

A: Moles=2.4*10^24/(6.022*10^23) = 4

Q: If 33.3 grams of hydrogen gas were mixed with 45.55 grams of nitrogen gas, then how many grams of…

A: Nitrogen gas reacts with hydrogen gas to form ammonia. The equation for the balanced chemical…

Q: Use the sample experimental data to calculate the mass of sample (BaCl2•xH2O) Mass of pan 15.110 g…

A: A question based on general chemistry that is to be accomplished.

Q: What is the mass of 1.8 x 10^21 molecules of O2?

A: given, number of molecules of O2 = 1.8×1021 molecules the molar mass of O2 = 32 gmol-1 avogadro…

Q: 2. What is the mass (in grams) of 7.11 X 102 molecules of tetraphosphorous trisulfide?

A: Given, number of molecules = 7.11×1022 Avogadro's constant = 6.022×1023 molecules.mole-1

Q: How much orygen is produced from 2.56 X 10 g HgO?

A: Number of moles = mass/molar mass  Mass = moles × molar mass  Molar mass of HgO = 216.59 g/mol…

Q: What is the mass of 2.11x10^24 molecules of C2H6

A: Number of molecules of C2H6 = 2.11x1024 Molar mass of C2H6 is 30.07 g/mol

Q: Find the mass (in grams) in 4.4 X 1023 molecules of CH,

A: Molar mass of CH4 = 16.04 grams Molecules of CH4 in 1 mol = 6.023× 1023

Q: Show your work: Balance the following chemical equation:   C7H16 + O2  --->  CO2 + H2O

A: Given Reaction : C7H16 + O2  --->  CO2 + H2O C7H16 + O2  --->  CO2 + H2O

Q: If you have 6 moles of Al(OH)3, how many moles of Cu(OH)3 will be produced?

A: Note : Formula for copperhydroxide is written wrong. Cu(OH)3 is wrong formula. Correct formula is…

Q: How much oxygen (in grams) will form from 63.7 g of N205? 2N205(s) 4NO2(9) + O2(9) |(Click to…

A:

Q: If 23.5 grams of silver nitrate are added to 16.0 grams of sulfuric acid, how many grams of silver…

A: Given: 23.5 grams of silver nitrate is added to 16.0 grams of sulfuric acid. To find: grams of…

Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".