How many C atoms are present in a 7.57 ng sample of nitrobenzene, C6H5NO₂? Note: 1 ng is one nanogram. Enter your answer in exponential notation, e.g. 1.23e20 for 1.23x102⁰. Do not include any units or words as part of your answer. Give your answer accurate to three significant figures. Molar masses (in g mol¯¹): H, 1.008 Number C, 12.01 N, 14.01 O, 16.00

Q: The chemical formula for calcium hydroxide is: Ca(OH)2 Calculate the molar mass of calcium…

A: The answer to the following question is given as:

Q: Mg(s) + 2 HCl(aq) −−−→ MgCl2aq) + H2(g)   given that the mass of magnesium is 0.030 g, find the…

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Q: What is the mass percentage

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Q: For the reaction C+ 2H₂ → CH4, how many moles of hydrogen are needed to make 155.6 grams of methane,…

A: The number of moles of a compound is determined by the balanced chemical reaction. The mass of a…

Q: Calculate the number of O atoms in 0.0136 g of CaSO4 2H₂O. x 10 O atoms (Enter your answer in…

A: Answer: Given data: Mass of CaSO4.2H2O m=0.0136g

Q: What is the mass percentage of carbon in C6H12O3? Express your answer as a percentage (i.e., out of…

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Q: 5. A 2.000 g sample of CoCl2·xH2O is dried in an oven. When the anhydrous salt is removed from the…

A: By calculating moles of CoCl2 and H2O we can find value of x.

Q: Consider the following balanced equation. 3 Ag(s) + 4 HNO3(aq) → 3 AgNO3(aq) + NO(g) + 2 H2O(l) A…

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Q: a student finds that they have 0.2929 g of NH4Cl, 0.6234 g of NaCl, and 1.3841 g of SiO2. Calculate…

A: Given Mass of NH4Cl =0.2929 g Mass of NaCl =0.6234 g Mass of  SiO2 = 1.3841g Initial mass of mixture…

Q: What was the percent of potassium chlorate in the mixture

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Q: Liquid octane (CH₂(CH₂) CH3) will react with gaseous oxygen (O₂) to produce gaseous carbon dioxide…

A: Limiting reactant - Reactant species which react completely or present in less amount in reaction.…

Q: Carborundum (silicon carbide), SiC, is a very hard material used as an abrasive on sandpaper and in…

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Q: 717.7 grams of isomaltitol, C12H24O11, was combusted in a furnace completely in an excess oxygen.…

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Q: For the reaction C + 2H2 → CH4, how many moles of hydrogen are needed to make  132.2 grams of…

A: Given chemical reaction :  C + 2 H2 → CH4

Q: For the following questions (Q1-Q4), consider the compound CoCl2 • 6H2O (cobalt (II) chloride…

A: Given data: Mass of CoCl2 • 6H2O = 2.51 g We know that, Molar mass of Co = 58.933 g/mol Molar mass…

Q: Dinitrogen oxide (or nitrous oxide), N2O, also known as laughing gas, is widely used as an…

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Q: The chemical formula for lithium hydride is LiH. A chemist determined by measurements that 0.0550…

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Q: 6. A student reported the following percentages for his unknown mixture: 25% NH4CI, 30% NaCI, and…

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Q: If you place 6.46 X 1027 molecules of Ca(OH)2 into this equation, how many moles of Ca(NO3)2 will be…

A: Given: The reaction is as follows: 2HNO3+CaOH2→CaNO32+2H2O The number of molecules of…

Q: What is the mass percentage of carbon in C7H11O3? Express your answer as a percentage (i.e., out of…

A: Mass percentage of element in compound is defined as percent ratio of element mass to the whole…

Q: The chemical formula for dimethyl ether is: CH;OCH3 Calculate the molar mass of dimethyl ether.…

A: The mass of one mole of a substance is known as molar mass. The molar mass of the sum of the masses…

Q: A mixture of N2(g) and H2(g) reacts in a closed container to form ammonia, NH3(g). The reaction…

A: The chemical reaction involved when N2 and H2 gases react to  form NH3 gas is  N2(g) + 3H2(g)…

Q: For the reaction C + 2H2 → CH4, how many moles of hydrogen are needed to make 197 grams of methane,…

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Q: Convert (8.808x10^24) molecules of water to grams of water. Avogadro's Number is (6.02x10^23). You…

A: given, a number of molecules of water = 8.808×1024 molecules Avogadro's constant, Na = 6.02×1023…

Q: How

A: moles of water = ( molecules of water ) / ( Avogadro number )  Where :  Molecules of water is 2.0 •…

Q: (c) In the core of the modern Sun, the density is about 1.25 x 105 kg/m³. What is the concentration…

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Q: The molar mass of one empirical unit of the antidepressant rolicyprine (C7H&NO) is 122.1 g/empirical…

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Q: The chemical formula for dimethyl ether is: CH;OCH3 Calculate the molar mass of dimethyl ether.…

A: The chemical formula of dimethyl ether states that one diethyl ether molecule contains two carbon…

Q: What is the molar mass for aluminum sulfate?

A: Number of moles = mass/molar mass  So, mass = moles × molar mass

Q: Limewater, a weak solution of calcium hydroxide, Ca(OH)2(s), is used to detect the presence of…

A: Given:- No of formula units of calcium carbonate in the solution= 8.7 x 1019 No of moles of  calcium…

Q: The chemical formula for t-butanol is: (CH;), Calculate the molar mass of t-butanol. Round your…

A: Molar mass is nothing but sum of the atomic masses(g/mol)  of each type of atom present in the given…

Q: The formula for alum is KAl(SO4)2  x 12 H2O. All of the atoms in this formula contribute to the…

A: Formula for alum  KAl(SO4)2 . 12 H2O formula mass of alum = 474.39 gmol molar mass of aluminium…

Q: Consider the following balanced equation. 3 Ag(s) + 4 HNO3(aq) → 3 AgNO3(aq) + NO(g) + 2 H2O(l) A…

A: You have given all required info, only you need to do is to find the mole of reactants and products…

Q: For the reaction C + 2H2 → CH4, how many moles of hydrogen are needed to make 170.6 grams of…

A:

Q: Benzene, C6H6, is an important solvent and intermediate chemical in many chemical reactions. It is…

A: According to the mole concept, one mole of any substance related as - (1) 1 mole of the Substance =…

Q: Mass (in grams) of 1.00×10−2 molof CdS. Express the mass in grams to three significant digits.…

A: The mass in grams is calculated for CdS as shown,

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".