A 12.5g sample of a hydrate of calcium chloride is found to contain 3.06 g of water. what is the formula of the hydrate?

Q: 1) Perform the following unit conversions: a. 35.7 moles to umol b. 0.065 mL to µL. c. 0.756 g/ml to…

A:

Q: AS > 0 I2(g) + C½(g)–→2ICI(g) →2NO(g) + Br2(g) 2NOBr(g)- CH4(g) + 202(g) AS < 0 CO2(g) + 2H,0(g)…

A: Given reaction with their phase. ∆S means change in entropy. ∆S = is disorder ness of the system.…

Q: What is the % by mass of a silver ring that has a mass of 12.0 g and contains 11.1 g pure silver?

A: Mass percentage of a compound represents the mass of solute present in a given mass of compound. It…

Q: K The material labeled K contains elements that do not conduct heat or electricity well The…

A: We have to name the elements from periodic table from given choices of options having similar…

Q: A laboratory instructor gives a sample of amino-acid powder to each of four students, I, II, III,…

A: Iavg=8.72g+8.74g+8.70g3=8.72gIIavg=8.56g+8.77g+8.83g3=8.72gIIIavg=8.50g+8.48g+8.51g3=8.50gIVavg=8.41…

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: A 45.6 g sample of zinc sulphide was found to contain 30.6 g of zinc. Find the masses of zinc and…

A: Solution- A 45.6 g sample of zinc sulphide was found to contain 30.6 g of zinc; 1 g sample of zinc…

Q: In a lab experiment, 8.21 g of phosphorus reacts with bromine to form 71.75 g of phosphorus…

A: According to the law of conservation of mass, the sum of mass of reactants and the sum of mass of…

Q: A 3.75-gram sample of limestone, CaCO3, contains 1.50 g of calcium and 0.450 g of carbon. What is…

A:

Q: 1. What is the sum of 89.332 g and 1.1 g? a. 90.4g b. 90.432g C. 90.0g d. 90.43g

A: The significant figures of a given number are those significant digits, which express the meaning…

Q: a combustion reaction, 33.5 g of hydrocarbon reacts with 96.0 g of oxygen to produce water and…

A: The process in which an organic substance like a hydrocarbon reacts with oxygen from air to give out…

Q: You made a 36.6 g sample of a compound made of carbon and oxygen. You know that 10.0 g of carbon…

A: Number of moles = Mass/Molar mass

Q: A pure titanium cube has an edge length of 2.85 inin . How many titanium atoms does it contain?…

A: Edge length of pure titanium cube = 2.85 in Density  of titanium = 4.50 g/cm3

Q: 4. Compare the total mass of the reactants with the total mass of the products: Total Mass of the…

A: Given reaction is,  K2CrO4 (aq) + Pb(NO3)2 (aq) →2KNO3 (aq) + PbCrO4 (s)

Q: A sample of calcium chloride, CaCl2, has a mass of 27.8 g. What mass of chlorine is present in the…

A:

Q: What is the percent by mass of F?

A: Percent by mass of F = (mass of F/mass of compound) × 100%

Q: 1 mg is the same as O 1/10 cg O 100 cg 1/1000 kg 10 g

A: The symbol, mg is used to express the mass of substance.

Q: (MC) A student who likes the taste of salt adds 1.50 moles of sodium chloride (table salt) to her…

A: Given : Moles of sodium chloride i.e NaCl = 1.50 mol.

Q: A 194g sample of caffeine contains 6.02 *10^23 molecules of caffeine. If a typical 10-hour energy…

A: 1000 mg = 1 g Given that: Amount of caffeine = 422 mg Number of molecules of caffeine per 194 g =…

Q: When carbon is burned in air, it reacts with oxygen to form carbon dioxide. When 22.8 g of carbon…

A: Since in any reaction, the total mass of reactants taken should always be equal to the mass of…

Q: You have two beakers on your lab table.  Beaker #1 contains 32.07 g of sulfur and Beaker #2 contains…

A: Given mass of Sulfur (S) = 32.07 g Given mass of Arsenic (As) = 74.92 g Molar mass of Sulfur =…

Q: On average, people use one teaspoon (2.5 g) of instant tea to make a 8-oz glass of ice tea. The…

A: 1 oz of iced tea contains 10 mg of caffeine.Therefore, 8 oz of iced tea contains 80 mg (0.08 g) of…

Q: Part A The American Dental Association recommends that an adult female should consume 3.0 mg of…

A:

Q: In a reaction, 34.0g of chromium(III) oxide reacts with 12.1g of aluminum to produce chromium and…

A: 34.0g of chromium(III) oxide 12.1g of aluminum Both of these react to produce 23.3g of chromium and…

Q: For each reaction, predict the sign and find the value of ΔS°:

A: It’s given below :

Q: 1. A student measured a 6.790 g sample of a hydrated salt. After heating, the mass of anhydrous salt…

A: a. Given that weight of hydrated salt is 6.790 g and mass of anhydrous salt is found to be 4.501 g.…

Q: Bill's recipe for onion soup calls for 4.80 lb of thinly sliced onions. If an onion has an average…

A: The average mass of onions = 140 g  Onions required for soup = 4.80 lb

Q: A 10.00-g sample of a compound containing sulfur and fluorine contains 2.195 g of S.  What is the…

A: First the percent mass of F present in 10 g of sample is calculated as shown below,

Q: In a reaction, 28.6 g of chromium(III) oxide reacts with 10.2 g of aluminum to produce chromium and…

A:

Q: Tin reacts with oxygen to form tin oxide. In a particular laboratory experiment in which oxygen…

A: We will first find mass of sn, then mass of tin oxide. Using this we will calculate oxygen reacted.

Q: In one experiment you reacted 45.7g of aluminum with 182.8g of iron (iii) oxide to produce aluminum…

A: The chemical equation can be written as: The chemical equation needs to be balanced so that it…

Q: A student measured a 6.790 g sample of a hydrated salt. After heating, the mass of anhydrous salt…

A: a) Given that weight of hydrated salt is 6.790 g and mass of anhydrous salt is found to be 4.501 g.…

Q: Two samples of potassium iodide are decomposed into their constituent elements. The first sample…

A:

Q: A 3.53-gg sample of aluminum completely reacts with oxygen to form 6.67 gg of aluminum oxide. Use…

A: Mass of aluminum in the sample is 3.53 g. Mass of aluminum oxide is 6.67 g.

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

A: The ratio of mass of the substance to the number of moles of the substances is known as molar mass.…

Q: A compound of copper and sulfur contains 88.39g of metal and 44.61g of nonmetal. How many grams of…

A: In order to calculate mass of copper in the new compound, first, we need to calculate the ratio of…

Q: Following the above question, for 1.50 L of mercury, what is the mass in kg? O 2.03 x 10° kg O 2.03…

A: Given details, The volume of mercury = 1.50 L = 1500 cm3 The density of mercury = 13.534 g/cm3…

Q: The hydrated form of nickel(II) chloride is a green compound commonly found in the chemistry…

A: One mole of a substance is that amount of it which contains as many entities as there are atoms in…

Q: An alien from the Planet X uses the units below for mass. How many zigs is 2.5 hums?  3 zigs = 1…

A: There are variety of units that are employed in measurement of mass. These smaller as well as larger…

Q: How many grams of mercury would be contained in 15 compact fluorescents light bulbs?

A: A compact fluorescent light bulb contains 3-5 mg of mercury.  Bulbs with eco-friendly label contain…

Q: 8. Suppose you were asked to prepare a 250 g chocolate mousse which is a 35% chocolate, 30% cream,…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: 4HClg) + O2(g) = 2C12(g) + 2H20(g)

A:

Q: A 7.57 g sample of calcium carbonate completely decomposes into calcium oxide (lime) and carbon…

A: A chemical reaction is a symbolic representation of the conversion of substances to new substances.…

Q: A chemist has two alloys, one of which is 5% gold and 15% lead and the other which is 40% gold and…

A: The given information about the alloys are shown below.

Q: In a reaction, 33.4 g of chromium(III) oxide reacts with 11.9 g of aluminum to produce chromium and…

A: The reaction taking place is between chromium (III) oxide i.e Cr2O3 and aluminium i.e Al to produce…

Q: When carbon is burned in air, it reacts with oxygen to form carbon dioxide. When 21.6 g of carbon…

A: The carbon and oxygen react to form carbon dioxide as follows: The stoichiometry of the reaction…

Q: What is the mass of 1 atom of krypton? a-3x10-22 g b-9x10-22 g c-2x10-26 g d-5x1025 g e-1x10-22 g

A: