two grains of a drug is equivalent to:  a. 129.6mg  b. 127.4 mg  c. 132.1 mg  d. 200 mg  e. 500 mg

Q: 15.1 g of K2CrO7 contains how many grams of potassium?

A:

Q: Sodium reacts with oxygen to produce sodium oxide in a synthesis reaction. A chemist needs to…

A: We can determine the mass of Na to start with by considering the balanced equation.  The reaction…

Q: Compound A has a density of 4.5 g/cm3. Suppose you plan to mix 197 g Element A (18.9 g/cm3) with…

A:

Q: The density of liquid benzene, C6H6, is 0.879 g/cm^3 at 15°C. How many moles are in 73.0 mL of…

A:

Q: A compound is found to consist of 1.37g of iron and 2.62g of chlorine. What is the percent by mass…

A: Given that: mass of iron = 1.37 g mass of chlorine =  2.62 g  To find: the percent by mass of…

Q: A chemist has two different gasohol mixtures available. One contains 20% alcohol and the other 12%…

A:

Q: A sudent needs to use 0.500 mole of sodium carbonate (Na C O) tor an experimment How many grans of…

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

Q: Convert the following: a. 8.75 g of B2O3 to mol b.167.2 mg of Na2B4O7.10H2O to mol c. 4.96 g of…

A:

Q: a 500 mg vitamin c tablet contains 0.150g of sodium ascorbate. what is  percentage by mass of sodium…

A: The mass of solute in gram present in 100 g solution is known as the mass percent concentration of a…

Q: The number of ammonia (NH3) molecules present in 4.85 grams of NH3is: a.1.02 x 10^25 c. 1.72 x…

A: Avogadro's  number gives the number of atoms, molecules or ions in one mole of the substance and it…

Q: You have a beaker containing 325.9mL of H2O and 14.55g of CaBr2. Calculate the mass percent.

A: Mass percentage ( % w/W ) :  mass of solute in grams present in 100 mL of solution is called mass…

Q: How many atoms Na are in 1.4 g of Na?     a. 3.7 x 1022 atoms Na   b. 1.0 x 10 -25 atoms Na…

A:

Q: A dietary supplement for calcium contains 600 mg of CaCO3 per tablet. How many grams of calcium are…

A:

Q: An analytical chemist measures the amount of Elements E, and E₂ in four samples of an unknown…

A:

Q: 12. A solid compound has a mass of 43.25 g. You scrape 2.5 g of the material off of the solid for…

A: Mass of compound = 43.25 g Mass of compound scraped = 2.5 g

Q: a. What is the percent by mass of carbon in 44 g of carbon dioxide (CO2 )?b. What is the percent by…

A: The mass percent of an element in a compound is calculated by using the relation as shown below.…

Q: An analytical chemist measures the amount of Elements E, and E, in four samples of an unknown…

A: A pure substance has a definite chemical composition. A pure substance can be an element or a…

Q: A 0.4017 g sample of nicotine was analyzed and found to consist of 0.2974 g C, 0.03494 g H, and…

A:

Q: How much zinc oxide powder should you add to 2 oz (AV) of 5% zinc oxide (Zno) ointment to make a 10%…

A: We will calculate amount of ZnO in 5% ointment , then calculate amount of ZnO added to it to make it…

Q: A 30.5 gram sample of glucose (C6H12O6) contains ________ mol of glucose.

A: Molar mass of Glucose i.e C6H12O6 is given by  Molar mass = Atomic mass of C X 6 + Atomic mass of H…

Q: What is the molar mass of calcnum chloride hexahydrate! a 75.53 g'mol, b.111.0 gmol c 1170 gmol d.…

A: The answer to the following Question is:

Q: sample of pure alumina hydrate was obtained from a bag of flame retardant. A 5.000 g sample of the…

A:

Q: What mass of phosphorus is present in 25 g P4S3? A. 14g B. 4.5g C. 11g D. 3.2g E. 100g

A: Since the Atomic mass of P = 31 g/mol and Atomic mass of S = 32 g/mol Hence molar mass of P4S3 =…

Q: In a beaker containing 20.0 g AgCl, 30.0 of NaCl, and 50.0 g of KCl. How much chlorine (in grams) is…

A: Given: Mass of AgCl is 20.0 g Mass of NaCl is 40.0 g Mass of KCl is 50.0 g To find: Mass of Cl in…

Q: 7. A metal (M) forms a compound with the formula Mle. The compound contains 71.00% I by mass. Ident…

A: As per our guidelines we can only solve first question. Please resubmit the other questions as next…

Q: Determine the mass of sodium in 15.5 g of NaNO3.   a. 17.4 g   b. 0.298 g   c. 4.19 g   d.…

A: Given that,mass of NaNO3 = 15.5 g Molar mass of NaNO3 = 84.9947 g/mol moles of NaNO3 = (mass of…

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: Which of the following contains the greatest number of molecules? A. 1 g of CH3CI В. 1 g of CH,Cl2…

A:

Q: Refer to the following table to answer questions pertaining to the composition of Mg/S compounds:…

A: In the table mass of compound and the mass of sulfur in the compound is given. Since only magnesium…

Q: Br Br 1. Mg Et₂0 1. Mg Et₂O 1. Mg Et₂0 2. 3. H3O+ 2. 3. H3O+ Дон 2. H 3. H3O+ CH3 /Et₂0 0/E1₂0 Et₂0

A: Grignard reagents add to carbonyl compounds to give primary, secondary, and tertiary alcohols

Q: How many GRAMS of sodium are present in 1.41 grams of sodium chloride, NaCl ? ____grams sodium How…

A: Given,Mass of sodium chloride, NaCl = 1.41 gMoles of NaCl can be calculated as:

Q: 5. Compound X is composed of 52.2% carbon, 13.0% hydrogen, and the rest oxygen, by mass. The…

A: Compound X contain C= 52.2%                                    H= 13%…

Q: What is the mass of NaCl in a 1 L bottle of 2.00 M NaCl? a. 29.3 g b. 58.0 g c. 116 g d. 234 g

A:

Q: An analytical chemist measures the amount of Elements E, and E₂ in four samples of an unknown…

A:

Q: Percent by mass of hydrogen in ammonia, NH3, is 17.77 %.  Which of the following is the grams of…

A: Gram of hydrogen = percentage of hydrogen × mass of ammonia.

Q: The gravemetric factor (G.F) for K2P207 (252.14 g/mol) that come from H2PO4 (96.987 g/mol)

A: Gravimetric factor is defined as- G.F. =a×Formula weight of analyteb×Formula weight of precipitate…

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".