9. How many grams of the insecticide calcium chlorate must be measured if a sample is to contain 4.17 g chlorine?

Q: A sample of a compund made entirely from copper and oxygen was founf to have a total mass of…

A:

Q: In preparation of Copper (I) Chloride, the mass of copper is 1.0762. Calculate moles of Copper…

A:

Q: A 2.45g sample of strontium completley reacts with oxygen to from 2.89g of strontium oxide. What is…

A: Mass of Sr = 2.45 g  Mass of Strontium oxide = 2.89 g  Mass % =?

Q: How many solium atoms are in 0.1010g of sodium?

A: first we will calculate number of moles then we will find number of atoms. Moles = given mass /…

Q: Chromium(III) nitrate forms a hydrate that is40.50% water by mass. What is its chemical formula?

A: If 100 % mass of Chromium nitrate is present and 40.50 % is the mass of water. Mass of anhydrous…

Q: A pure gold ring contains 0.0102 mmol (millimol) Au. Howmany gold atoms does it contain?

A: Given: Moles of Au = 0.0102 mmol= 0.0102×10-3 mol To find: The number of gold atoms

Q: Convert a mass of 1.5 kg of calcium carbonate to an amount in moles.

A: Given, 1.5 kg of calcium carbonate

Q: A 12.35 g sample of aluminum hydroxide contains how many mol of hydroxide ions?

A:

Q: The empirical formula of a compound is CH. If themolar mass of this compound is about 78 g, what is…

A: Empirical formula is the simplest ratio of the elements in a compound whereas molecular formula is…

Q: Solid lithium hydroxide is used to remove exhaled carbon dioxide from space vehicles by forming…

A: Lithium hydroxide is used to absorb CO2 gas. It was also used in APOLLO 13 mission. It absorbs…

Q: Solid lithium hydroxide is used to remove exhaled carbon dioxide from space vehicles by forming…

A: A balanced chemical equation for a given reaction is defined as the chemical equation containing…

Q: For the molecular compound phosphorus pentachloride, what would you multiply "moles of PCI5" by to…

A: To determine the multiplying factor to convert the moles of PCl5 to the number of molecules of PCl5.…

Q: How many molecules are in 22.4moles of CCI,?

A:

Q: 7) 23 mols of Magnesium Nitride were produced, how many mols of Magnesium Carbonate were required to…

A: To solve such a question, proper knowledge of the mole concept is required. When reactants are…

Q: How many moles of MgSiO, are in 163 g of the compound?

A: Number of moles of a substance is equal to the mass of the substance divided by its molar mass.

Q: The molar mass of oxygen is?

A: The mass of one mole of an atom or molecule is defined as the molar mass. The molar mass is…

Q: How many moles of tin atoms are in a pure tin cup with a mass of 43.8 g ? v= ? mol

A: Mole concept:  According to Avogadro concept, the number of atoms in one mole of the substance is…

Q: What is the percent by mass of calcium tungstate

A: Percent by mass of Ca in CaWO4 = (mass of Ca/mass of CaWO4) × 100% Percent by mass of W in CaWO4 =…

Q: 8 Calculate the number of moles, and molecules in:

A: 8. Number of moles = mass/molar mass  1 mol = 6.022 × 1023 molecules

Q: Calculate the mass % of H in ammonium bicarbonate.

A: We have been asked the mass % of H in ammonium bicarbonate.

Q: 560g of silicon dioxide to molecules of silicon dioxide

A:

Q: The weight of grams for 4 moles of Br

A: We know, Number of moles = Mass /Molar MassThus,

Q: the chemical formula for hydrogen, chloride istet. A chemist, measured the amount of hydrogen…

A:

Q: The number of moles of caffeine in 50.0 g of caffeine is?

A: The given Mass of caffeine = 50.0 g  Molecular formula of Caffeine is C8H10N4O2

Q: Mass % of N in dinitrogen trioxide

A: The chemical formula of diniteogen trioxide is N2O3. The molar mass of N2O3=[(2×14)+(3×16)] = 76…

Q: Solid lithium hydroxide is used to remove exhaled carbon dioxide from space vehicles by forming…

A: The balanced equation for the reaction between LiOH and CO2 is  2 LiOH + CO2 ---------> Li2CO3 +…

Q: Six moles of hydrogen sulfide, H2S, would consist of how many molecule

A: Interpretation -  To determine number of molecule of Six moles of hydrogen sulfide H2S -…

Q: A tank contains 325 moles of compressed helium qas. How many Helium atoms are in the tank?

A:

Q: How many moles of aspirin contain 8.62 × 10 25 molecules?

A: 1 mole of a substance contains Avogadro's number (6.022×1023) of molecules.

Q: If 0.00124 moles of acetic acid is present in your 2.00 mL sample, how many grams of acetic acid are…

A: Given - Moles of acetic acid = 0.00124 moles volume of acetic acid sample solution = 2.00 ml To find…

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

A:

Q: What advantage is there to using a counting unit (the mole) inchemistry rather than a mass unit?

A: Using counting unit as mole in chemistry is advantageous as with help of this we can inter convert…

Q: A sample of naphthalene was analyzed in the laboratory and it was determined that the sample…

A: Number of moles (mol) = Given mass (g)Molar mass (g/mol)Given that:Number of moles= 0.457 molesMolar…

Q: Percent yields are generally calculated from mass quantities.Would the result be the same if mole…

A: Interpretation- To explain with reason for the result of calculating percent yield using mole…

Q: Solid lithium hydroxide is used in space vehicles to remove exhaled carbon dioxide from the living…

A: Mass of LiOH = 1kg

Q: how many moles of HCI are in a sample of HCI with a mass of 126 g?

A:

Q: How many molecules are contained in a glass that holds 250 g of water? How many moles does that…

A: Number of moles is given by the ratio of mass of the substance to that of the molar mass of the…

Q: in the laboratory, a student weighs out 0.0852 g of cobalt on balance. how many atoms of cobalt are…

A: We have 0.0852 g of Co , we have to calculate the atoms of cobalt in the sample.

Q: 5 g of hydrated barium chloride is heated in a crucible until the mass of the sample no longer…

A: Given: Mass of hydrated barium chloride = 5 g Mass of sample after heating = 4.26 g The loss of mass…

Q: A water bottle contains 54 g of water. How many water molecules are contained in the bottle?

A: Given data is as follows: The mass of the water = 54 g The molar mass of Water (H2O = 18 g/mol As we…

Q: What might be a reason you obtained a percent yield of less than/greater than 100% for the mixture

A: The formula used to calculate the percent yield is,If the obtained percentage yield is less than…

Q: How many formula units are in a sample of NaCl that has a mass of 175 g?

A: Number of formula units = moles X Avogadro number Avogadro number = 6.022 X 1023  Since moles = mass…

Q: the empirical formula of a compound

A:

Q: Aluminum sulfate is analyzed, and the sample contains 0.0650 moles of sulfate ions. How many moles…

A:

Q: How many grams of the insecticide calcium chlorate must be measured if a sample is to contain 5.79 g…

A: Formula of calcium chlorate = ca(clo3)2 Molecular mass of calcium chlorate is 207g

Q: How many formula units are equal to 1.80 moles of magnesium iodide? Round to two decimal places.

A: In Ionic compound there is no existence of molecule because cations and anions are strongly…

Q: In a lab, a grade 11 chemistry student measured 0.30g of solid magnesium metal. The student proceeds…

A:

Q: How many atoms of cobalt (Co) are in a sample of pure cobalt that is (4.18x10^-3) moles?

A:

Q: Mass % of H in ammonium bicarbonate

A: Given  Name of Compound = Ammonium bicarbonate Mass % of H = ?

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".