A sample of ammonia (NH3) has the mass of 56.6 g.  How many molecules are in this sample? Group of answer choices 17.03 x 1024 molecules  6.78 x 1023 molecules  2.00 x 1024 molecules  1.78 x 1024 molecules  3.32 molecules

Q: A pure titanium cube has an edge length of 2.69 in . How many titanium atoms does it contain?…

A: Given- Density of titanium = 4.50 g /cm3 Edge length of pure titanium cube = 2.69 in To find- number…

Q: Express your answers to at least 5 significant figures. The mass of one mole of boron is 10.811 g.…

A:

Q: A chemical compound is analyzed for its elemental composition, and is found to contain 57.14%…

A: The mass of C , H and O is 57.14 g , 4.80 g and 38.06 g respectively. Assume that the total mass of…

Q: How many daL of bromine are in 15.7 x 1022 molecules?  (The density of bromine is 3.1 g/cm3) The…

A: Given: The density of bromine = 3.1 g/cm3 We have to find How many daL of bromine are in 15.7 x 1022…

Q: A sample of chlorine has a mass of 49.4 grams. How many Cl atoms are there in the sample?  atoms…

A: Chlorine mass of  = 49.4gm Calculate the  =  1 - how many cl atom of sample  2 - how many cl2…

Q: One ounce of dark chocolate contains 0.25 g theobromine, a compound related to caffeine. Calculate…

A: GivenMass of theobromine = 0.25 gChemical formula of theobromine =C7H8N4O2Molar Mass of theobromine…

Q: An electric current is passed through 60.0 mL of water (H2O). This converts the water into 53.33 g…

A: Given  Volume of water = 60 mL  Mass of Oxygen  = 53.33 gram Mass of hydrogen gas  = 6.67 gram…

Q: 2NaCl + 1 Br2 → 2 NaBr + 1 Cl2     How many moles of NaCl are there in 99 grams of NaCl?  If you…

A: a) Given, Given mass of NaCl = 99 grams b) Given, Amount of NaCl is 31 grams c) Given, Amount of…

Q: Periodic Table are the most important for human life.  2. The combining ratio of a compound tells…

A:

Q: Element X forms three different compounds with element Y. Information about these compounds is…

A: We have to predict the formula for the other two compounds.

Q: Calculate the mass (in grams) of 4.69 x 1024 carbon atoms.

A: Given : 4.69 × 1024 carbon atoms.  We know 6.022 × 1023 atoms = mass of one mole

Q: What is the percent by mass of oxygen in morphine, C17H19NO3? Group of answer choices 71.55 6.72…

A: The molecular formula of morphine is = C17H19NO3 The percent mass of oxygen in the morphine is =?

Q: Sterling silver contains 925 parts silver and 75 parts copper by mass. What is the percent silver in…

A:

Q: A sample of C,H, has 9.28 x 1024 H atoms. How many carbon atoms does the sample contain? number of…

A: The amount of substance is usually defined in terms of mole. The mole is the SI unit of the quantity…

Q: A sample of trifluoroacetic acid, C2HF3O2, contains 82.182.1 g of fluorine. Calculate the mass of…

A: Given, trifluoroacetic acid C2HF3O2, contains 82.182.1 g of fluorine Molar Mass of trifluoroacetic…

Q: The mass percent of a solution is 12.00% and contains 30.0 grams of MgCl2. What is the total mass of…

A: Mass %=Mass percentage is calculated as the mass of a component divided by the total mass of the…

Q: 3. How many water molecules are in 2.00 liters of water? The density of water is 1.00 g/mL.

A: Density of water = 1.00 g/mL It means 1.00 mL water contains 1.00 g

Q: If liquid bromine has density = 3.12 g/mL, how many Br2 molecules are present in a 1.0-mL sample of…

A: Given: Density of liquid bromine (d) = 3.12 g/ml The volume of liquid bromine =1.0 ml To find:…

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

A: Given is a sample of X containing E1 and E2. To find: If X is pure? To find mass of E1 if X is 10…

Q: A compound is found to be 30.45% N and 69.55 % O by mass. If 3.01 g of this compound occupy 780 mL…

A: Empirical Formula :- When we write the chemical formula of a compound with the simplest ratio or…

Q: A sample of oxygen has a mass of 25.2 grams. How many O atoms are there in the sample?  atoms How…

A: Calculation given as follows

Q: Write the chemical formula for each compound, and then calculate the amount in moles in each sample.…

A: Given: Mass of copper(II) sulfate pentahydrate = 78.1 kg

Q: Be sure to answer all parts. Enter your answers in scientific notation. Calculate the number of…

A: The compound given is Ca3(PO4)2. Mass of Ca3(PO4)2 given = 9.75 g Molar mass of Ca3(PO4)2 = Atomic…

Q: On average, there are 0.2083 g CaCl2 in 1 L bottled water. How many molecules of CaCl2 are in 1 L…

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

Q: An allotrope of elemental sulfur is the cyclic molecule S6 . Calculate the number of molecules and…

A: The number of molecules and moles are related to each other by the given relationship as; 1 mole =…

Q: 1. ____N2 + 3H2 ____NH3

A: Since you have posted a  question with sub-parts , we are entitled to answer the first three…

Q: How many neon atoms are contained in (6.89x10^2) grams of neon? Use at least two decimal places for…

A: Given -> Weight of neon = 6.89 × 102 gram

Q: Use the periodic table from an alternative universe below to answer the questions[ Syn A 1A 2A 8A…

A: The balanced reaction is: 2K3O+3VP→3K2P+1V3O2 Assuming that the molar mass of an element is twice of…

Q: Una masa de mercurio ocupa 0.750 L Qué volumen ocuparia una masa igual de etanol? La densidad del…

A: Note - Since you have asked multiple question, according to our policy, we are supposed to solve…

Q: The major product formed in the reaction is:

A:

Q: Tia has a sample of pure gold (Au). She weighed the sample and the result was 10.810.8 grams. Tia…

A: Number of atoms = number of moles x 6.0224 x 1023 Number of moles = Mass/molar mass

Q: Determine the mol H2O/mol CaSO4 if you have the following data to two decimal places (MM H2O =18.02…

A: Moles are ratio of mass to molar mass of substance.

Q: What is the mass in grams of 1.37 x 10^24 atoms of nickel? ______ grams How many nickel atoms are…

A: Calculate mass and number of atoms of Nickel in the given data in the question---  Value--  Avogadro…

Q: How many atoms are there in each of the following substances? 1.88 g Bi Express your answer using…

A: Calculate number of atoms in each element given--

Q: One millimeter of water contains about 20 drops. One gram of water contains 3.34x10^22 molecules of…

A: One millilitre of water contains about 20 drops. One gram of water contains 3.34×1022 molecules of…

Q: hat is the mass of 4.50 x 1022 Cu atoms? Multiple Choice 747 x 102 g 4.75 g

A: Molar mass Cu is 63.546

Q: 2. Translate the following chemical equations into sentences: a. CS2 (1) + 302 (g) → CO2(g) + 2 SO2…

A: Since you have posted a question with multiple parts, we can solve only first three parts for you.…

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

A: Since the unknown substance, X contains elements E1 and E2, it can be either a compound of E1 and…

Q: If you have 74.2% silicon dioxide in your 52.0g sample, what mass (in grams) of silicon dioxide do…

A: Given: Mass of the sample=52.0 g  Percentage of silicon dioxide in the sammple= 74.2 % Mass silicon…

Q: A mole in chemistry is: a. a counting unit of 6.02 x 10²³ grams. b. a counting unit of 6.02 x 10²³…

A: We know that ,                    1 Mole = 6.023 x 10^23 atoms…

Q: re the masses of C and H ( in grams)? (MM C = 2.01 g/mol, MMH = 1.008 g/mol) (A) 55.19 g and 10.81 g…

A: Theoretical yield = actual yield/% yield

Q: 7. To make a ham sandwich, you choose to use 2 pieces of bread (B), 4 slices of ham (H), and 1 slice…

A: Given, Peices of Bread = 14 Slices of Ham = 24 Slices of cheese = 7

Q: A drop of water has a volume of 50 uL. How many water molecules does it contain? The density of…

A: Given that,Volume of water = 50 micro L = 0.05mLDensity of water = 1.0 g/mLNow, you calculate the…

Q: How many molecules are in 6.26 grams of sulfur dioxide? ______ molecules What is the mass in grams…

A:

Q: A typical cup of coffee has about 100. mg of caffeine. Calculate the number of caffeine molecules in…

A:

Q: A sulfur dioxide gas sample has a volume of 242.62 mL at 242279 pascals and 82.99oF. Calculate the…

A: Given,

Q: 1. How many ATOMS of carbon are present in 9.30 grams of carbon tetrafluoride, CF4? atoms of carbon…

A:

Q: What mass of oxygen is present in 10.0 grams of potassium nitrate (KNO3)?

A: Mass of KNO3 = 10 g Molar mass of KNO3 = 101.1 g/mol

Q: How many glucose molecules are there in a 90.0 g sample of glucose (CH12O? Select one: O a. 3.01 x…

A:

Q: An 8.53 mg sample contains 1.72 mg of phosphorous.  What is the mass percentage of phosphorous in…

A: Given  mass of phosphorous = 1.72 mg mass of compound = 8.53 mg  Formula : mass percentage of…

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.