Potassium dichromate, K2Cr2O7, is used in tanning leather, decorating porcelain, and waterproofing fabrics. Calculate the number of oxygen atoms in 43.06 g of K2Cr2O7.

Q: Strontium phosphate, Sr3(PO4)2, is a crystalline substance used in medicine and industry. How many…

A: Given that, Sr3(PO4)2

Q: etermine the number of atoms in 37.0 grams of sodium, Na. (The mass of one mole of sodium is 22.99…

A: Mass of sodium =37.0g Atomic mass of sodium = 22.99g/mol Moles of sodium = 37.0g/22.99g/mol = 1.61…

Q: A.How many moles of boron trichloride are present in 1.03 x 10^23 molecules of this compound? B.How…

A: Mole concept: The number of molecules or atoms present in the one mole of the substance is equal to…

Q: 1. Manufacturers of headache remedies routinely claim that their brands are more potent pain…

A: Given that, extra-strength Tylenol uses 600 mg = (600/1000) g = 0.6 g of acetaminophen (C8H9NO2). We…

Q: Determine the number of atoms in 55.0 grams of sodium, Na. (The mass of one mole of sodium is 22.99…

A: Here given, the mass of one mole of sodium is 22.99 g. So, in 55 grams of sodium, there are…

Q: How many carbon atoms are in 8.94 mL of C3H6O? 1 mole 6.02 x 1023 atoms 1 mL = %3D 0.883 g atoms of…

A: Calculation of mass in 8.94 mL: 1 mL=0.883 g8.94 mL=0.883 g1 mL×8.94 mL=7.894 g

Q: OC) 5.06 x 1024 How many atoms of carbon are in 23.1 g of caffeine (C8H10N4O2)? A) 8.00 B) 7.16 x…

A: Formula of caffeine = C8H10N4O2  Mass of caffeine = 23.1 g  Molar mass of caffeine = 8(molar mass of…

Q: A mole of a substance is defined as the amount of substance contained in 12 grams of carbon the…

A:

Q: How many molecules are in each sample? a. 6.5 g H,0 b. 389 g CBr, c. 22.1 g O, d. 19.3 gC,H10

A: a) 2.5g H2O = Mass of H2O = 6.5g Molar mass of H2O = 18g/mol The number of molecules can be…

Q: What mass of cerussite, PbCO3, would contain 35.0 grams of lead? (a) 51.7 g (b) 42.4 g (c) 35.6 g…

A:

Q: An iron-containing compound is 20.1% Fe, 11.5% S, 63.3% O, and 5.1% H. What is the empirical formula…

A: For calculating Empirical formula for compound we follow these steps:(i) calculate %Atomic mass for…

Q: Please solve a, b, c thank you

A: Lead(IV) selenite is Pb(SeO3)2  Molar mass of compound = 461.2 gm/mol  Mass of compound = 12.47 gm

Q: The molecular formula of Aspirin is C9H;O4. How many Aspirin molecules are there in a table that…

A: Given that:  Mass of aspirin = 200mg = 200mg×1g/1000mg = 0.2g Molar mass of C9H8O4 =…

Q: How many carbon atoms are there in 9.50 g Na2C2O4?

A: It is known that 1 mole of a substance is equal to 6.022×1023 atoms. The given compound is…

Q: A drop of water has a volume of approximately 6×10−2 mL . How many water molecules does it contain?…

A: Relation between mass and number of molecules is:

Q: How many carbon atoms are in a pure diamond (all carbon) with a mass of 52.00 mg? A. 4.330 x 103 O…

A: Given: Mass of carbon = 52.00 mg = 52×10-3 g (since 1 g = 103 mg) Atomic mass of carbon = 12 g/mol

Q: Use the References to The formula for sulfur dioxide is SO2. a. How many molecules are in 2.70 grams…

A: a. Here, we have to find the number of sulfur dioxide molecules present in 2.70 g of SO2. b. Here,…

Q: Which of these statements is FALSE about the mole? O a. 1 mole is equal to 6.022 x 10 23…

A: Since you gave posted multiple questions, we are entitled to answer the first only.

Q: 1. How many ATOMS of nitrogen are present in 8.78 grams of dinitrogen tetrafluoride ? atoms of…

A: 1 mole = 6.022×1023 [ Avogadro's number ]  The mass of one mole of molecules is known as molar mass…

Q: Which of the following items has the greatest number of carbon atoms? A. 2.71 x1022 molecules of…

A: Calculate in which one having greatest number of carbon atom ?

Q: What is the number for each atom present in the empirical formula of a compound that has 59.98%…

A: The answer to the following question is-

Q: How many oxygen atoms are there in 50 g of sucrose (C12H22O11).

A: Mass of sucrose = 50 g  Formula of sucrose = C12H22O11

Q: 105: A drop of water has a volume of approximately 0.05 mL. How many water molecules does it…

A: 105. Given that,  Volume of 1 drop of water = 0.05 mL Density of water = 1 g/mL Mass of 1 drop of…

Q: The number of O atoms in 1 mole of NO2 is A. 2 B. 1.204 x 1023 C. 6.02 x 1023 D. 1.204 x 1024

A: A mole of substance can be defined as a substance which contains exactly 6.022×1023 atoms,…

Q: The number of copper atoms in 2.35 bf of copper wire ?

A: According to the Avogadro's law, 1 mole of each substance contains the Avogadro's number, 6.022×1023…

Q: A sample of a compound was found to contain 54 grams of aluminum, 96 grams of oxygen, and 6 grams of…

A:

Q: The number of Cr atoms in a 26.0 g sample of chronium is x. How many atoms, expressed in terms of x,…

A: Number of moles = mass in gram / molar…

Q: Aspartame is an artificial sweetener that that is 160 times sweeter than sucrose(table sugar) when…

A:

Q: When molecules are represented by molecular models, what does each sphere represent? How big is the…

A: Molecular model is the complete way to specify a given compound.

Q: Calculate the number of atoms in each of the element in 1.0253 g of glucose, C6H12O6.

A: Given: Mass of C6H12O6 = 1.0253 g.

Q: A compound is composed of 57.51 % carbon, 1.63% H, 18.89% N, 13.05 % O, and the remainder other…

A: Given , A compound contains 57.51 % carbon , 1.63 % H , 18.89 % N , 13.05 % O and remainder are…

Q: How many fluorine atoms are there in 5.45 x 1028 molecules of carbon tetrafluoride

A: Given: molecules of carbon tetrafluoride CF4=5.45×1028

Q: How many grams are contained in one equivalent of iron (iii) ion, Fe3+? A) 167.6g B) 55.85g C)…

A: The mass of iron present in one equivalent of iron (iii) ion, Fe3+ is calculated as,

Q: A brass alloy contains 87.7% copper, Cu, by mass with the remainder of the alloy being zinc, Zn.…

A:

Q: 1. Determine the number of atoms in 0.475 g of palladium (Pd). atoms 2. Determine the mass of 139…

A: One mole of any element contains approximately 6.022 x 1023 atoms of that element. Therefore, to…

Q: 1. How many ATOMS of nitrogen are present in 6.28 grams of dinitrogen tetrafluoride ? atoms of…

A: The molecular formula of dinitrogen tetrafluoride is:-  N2F4 Avogadro number is 6.022×1023 The molar…

Q: 1. How many atoms of nitrogen are present in 8.98 grams of nitrogen trifluoride?     2. How many…

A: Hey, since there are multiple questions posted, we will answer first question. If you want any…

Q: Write the formula for each of the following compounds and indicate which ones are best described as…

A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: Determine the number of atoms in 27.0 grams of bromine, Br. (The mass of one mole of bromine is…

A: Given : mass of 1 mole of bromine i.e Br = 79.90 g And mass of Br = 27.0 g

Q: Determine the number of atoms in 41.0 grams of sodium, Na. (The mass of one mole of sodium is 22.99…

A: Given: Mass of sodium 41.0 g            Mass of one mole of sodium is 22.99 g/mol First divide the…

Q: The Avogadro number is defined as A The number of electron in 12g of C-12 substance B The number of…

A: The question is based on the concept of avogadro  number. we have to correctly identify the…

Q: With explanation please

A: In chemistry, the term empirical formula can be defined as the simplest positive ratio of the number…

Q: Chemical formulas can be written as empirical formulas, molecular formulas, or structural formulas.…

A: Given: An Empirical formula gives the simplest, whole-number ratio of atoms in a compound. A…

Q: Beryl (emerald) is a precious gemstone with the formula:  Be3Al2(SiO3)6.  MM Be3Al2(SiO3)6  =…

A: a. Given, 1.00 g of beryl

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

A:

Q: . What is the number of moles of nitrogen if the mass of morphine is ninety-two point four grams? 2.…

A: 1. What is the number of moles of nitrogen if the mass of morphine is ninety-two point four grams?…

Q: The Cullinan diamond was the largest natural diamond ever found (January 25, 1905). It weighed 3104…

A: 6.023× 10^23 is called Avogadro's number. 1 mole of any substance contains Avogadro's number of…

Q: How many molecules is 9.88 x 10^13 grams of ZnCI2, zinc chloride

A: Avogadro number: It can be defined as by saying that the number of units in one mole of any…

Q: Calculate the mass of dinitrogen tetroxide N2O4 that contains a million ×1.000106 oxygen atoms.

A: