3 If you have 3.90 x 1028molecules of Sodium carbonate, how many grams do you have ?

Q: What is the mass, in grams, of 9.34 x 1024 molecules of methanol (CH3OH) ? mass: g

A:

Q: A sunscreen preparation contains 2.50% by mass benzyl salicylate (2.50g benzyl salicylate/100g…

A: Given : weight of benzyl salicylate = 2.50 g in 100 g sunscreen  And one tube contains 4 ounces of…

Q: The mineral chalcocite, Cu2S, has been mined for centuries and is one of the most profitable copper…

A: Answer: This question is based on stochiometric calculation where moles of copper needs to be…

Q: A beaker contains 48.948.9 mL of carbon tetrachloride (CCl4CCl4, density is 1.591.59 g/mL).…

A: Volume of carbon tetrachloride = 48.9 mL  Density = 1.59 g/mL  Density = mass ÷ volume

Q: if you have 22.915 grams of iron (II) nitrate and 30.817 grams of sodium sulfate, how many grams of…

A: We have to calculate the mass of sodium nitrate formed.

Q: complete reaction

A:

Q: Selenium dichloride, SeCl2, has a molar mass of 149.86 g/mol.  What is the mass in grams of 0.325…

A: Given, moles of SeCl2 = 0.325 moles molar mass of SeCl2 = 149.86 g/mol mass of SeCl2 = ?

Q: What is the mass in grams of 3.7 x 1019 particles of iron(III) carbonate?

A:

Q: This is the chemical formula for acetic acid (the chemical that gives the sharp taste to vinegar):…

A: Mole ratio indicates the proportion of different atoms present in one compound and it is used to…

Q: Vitamin B12, cyanocobalamin, is essential for human nutrition. Its molecular formula is…

A: Cyanocobalamin is vitamin B12 with molar mass of 1355.38 g/mol

Q: Thyroxine is a hormone secreted by the thyroid gland and has a formula of C15H11NO4I4. How many…

A:

Q: ome bismuth tablets, a medication used to treat upset stomachs, contain 262 mg of bismuth…

A: Stoichiometry involves the calculation of concentration of solutions in the given conditions of…

Q: A chemist needs 32.0 g of phenol, C6H5OH, for an experiment. How many moles of phenol is this?…

A: Number of mols =Weight in g molecular weight in g/mol Molecular weight is the sum of the atomic…

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.