Why is it important to be able to calculate an empirical formula from experimental data? A. A chemist uses this information to analyze an unknown compound to determine which elements the compound contains. B. An empirical formula provides the molecular mass of the compound. C. This information allows chemists to determine the relative masses of the elements in an unknown compound. D. The empirical formula is needed to understand the physical properties of the compound.

Q: Calculate the number of moles in each sample. a. 72.5 g CCI4 c. 25.2 kg C2H2 b. 12.4 g C12H22011 d.…

A: The number of moles of a substance is calculated by dividing the given mass of that substance with…

Q: 6. Which statement describes the atoms and mass in a chemical reaction? Oa. The mass and the number…

A: In a chemical reaction, the number of atoms remains same on the both side of the reaction that is…

Q: Which statement describes a compound? A. It contains a solute. B. Its composition can vary. C.…

A: All the matters are composed of atoms. The matter that formed by only one type of atom is known as…

Q: Which of the following has the most moles of substance? a. 10.0 g He b. 5.0 x 10²³ atoms Ne c.…

A:

Q: 13. How many oxygen atoms are in 225 g of O2? a. 4.23 x 1024 b. 6.84 x 1024 c. 8.47 x 1024 d. 1.69 x…

A: Number of Atoms of Oxygen can be calculated as -

Q: In chemical reactions: Select one: a. molecules and atoms can be created or destroyed b. molecules…

A: To explain in chemical reactions :  a) molecules and atoms can be created or destroyed  b) molecules…

Q: 1. identify 4 different chemical compounds. A.) calculate the mole mass of each chemical compound.…

A:

Q: The composition of a commercial cold remedy mixture is 87% aspirin, 7% caffeine, 6% vitamin C. What…

A: Mass of mixture that contains 5 g Caffeine = ? % of aspirin = 87 % % of caffeine = 7% % of vitamin C…

Q: The empirical formula of a group of elements is:      a. The simplest whole number ratio of atoms…

A: Empirical formula of any compound is defined as the simplest whole number ratio of atoms present in…

Q: Determine the mass of one formula unt of barium hexafluorosilicate, BASIF6(s). a. 1,68 x 1026 g b.…

A:

Q: 13 Analysis of 1.60 grams of an oxide of iron formed 1.12 grams of iron. a What mass of oxygen was…

A: The objective of the question is to determine-a. The mass of oxygen formed during the analysis.b.…

Q: 1. How many moles are present in 24.0 grams of Sb,S,? a. 1.31x10 mol b. 1.56x10 mol c. 5.94x10 mol…

A: (1) Number of moles of Sb2S5 can be determined by using the formula given below as: Moles of…

Q: Calculate the mass percent composition of nitrogen in each nitrogen-containing compound. a. N,0 b.…

A: Calculate the mass percent composition of nitrogen in each nitrogen-containing compound. a. N2O b.…

Q: Morphine (molar mass = 285.37 g/mol) is a narcotic %3D painkiller. How many moles of morphine are…

A: We know that : moles = weight of substance/molecular weight of substance  Or, moles (n) = weight…

Q: 3. It is found a certain sample of a compound contains 23.0g of sodium and 35.5g of chlorine. a.…

A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question…

Q: 41) How many molecules of water are present in 54g of water?   A. 1.8x1024   B. 12x1023   C.…

A:

Q: Classify each compound as ionic or molecular. a. CO2 b. NiClz c. Nal d. PCl,

A: Ionic solids are made up of positive and negative ions and these ions are held together by…

Q: For item 1-2 please refer to the problem on the picture. Please answer and choose the correct answer…

A: The balanced chemical equation is                   16 Al + 3 S8→8 Al2S3        16 moles of Al…

Q: 24. Select the correct statement below. The percent composition (by mass) is the same for each…

A: The statements which are correct are, A) The percent composition (by mass) is the same for each…

Q: An unknown chemical compound made of C, H, and O is found to have the following mass percent values:…

A: Empirical formula of a compound is expressed by the ratio of minimum number of atoms of each…

Q: How many oxygen atoms are present in 3,0 x 1023 molecules of Ca(NO3)2?   A. 6.0 x 1023   B. 1.5…

A: 1 molecule of Ca(NO3)2 have 6 oxygen atoms as NO3 have 3 oxygens and (NO3)2 will have 3 x 2 = 6…

Q: 12. Complete combustion of 1.550 grams of a compound produces 1.250 grams of carbon dioxide and…

A: Given data :

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: 9. A compound of titanium and oxygen has a composition by mass of 60 % Ti and 40 % O. Determine the…

A: In the given questions we are given that titanium is 60% and oxygen is 40%  Means for every 100 g of…

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: 1. A compound is 48.38% carbon, 8.12% hydrogen, and 53.5% oxygen by mass. Find its empirical…

A:

Q: which has the correct number of atoms in one molecule of dichlorine momooxide A. contains three…

A: To determine No of Atom in a molecule, we must know the molecular formula of that molecule Then we…

Q: 13. Dichloroethane, a compound that is often used for dry cleaning, contains carbon, hydrogen, and…

A: When two or more atoms combine with each other, they will form molecule and those molecules has…

Q: Determine the amount of mass produced AuCl3 when 10grams of Cl2 is reacted with Au.

A: 2 Au(s) + 3 Cl2(g) → 2 AuCl3 (g) From this Balanced chemical equation we get that ; 3 mole of Cl2…

Q: 30. An aluminum alloy contains 0.091 mol aluminum and 0.038 mol of magnesium. Determine the mass…

A:

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

A: Given Mass of indium carbonate = 19.2 mg

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: Consider 1.00 g of Copper (Cu) metal. How many Cu moles are present in this sample? How many Cu…

A: Since moles of element = mass of element / Atomic mass of element  Atomic mass of Cu = 63.5 g/mol…

Q: Molar mass is defined as: a. the mass of one mole of a substance in grams. b. the mass of one gram…

A: option a

Q: Sea salt is formed by natural evaporation of ocean water and contains 98% sodium chloride. The…

A:

Q: What is the total number of atoms contained in 3.00 moles of cobalt?

A: Given :- number of moles of Co = 3.00 mol  To calculate :- number of atoms of Co

Q: 16. Which of these is not a molecular compound? 16. A. SO2 В. N-O C. ICla D. Al2S3 E. CH4

A:

Q: 0. How many grams of platinum contain the same number of atoms as 49.5g of mercury?

A: Applying mole concept and number of atoms.

Q: The carat is the unit of mass used by jewelers, and it is exactly 200 mg. How many carbon atoms are…

A: In international system of unit, there are seven basic units. Out of those seven unit Mole is one of…

Q: 6. Calculate the mass of 5.00 mol of NH3. A. 65 g NH3 B. 75 g NH3 C. 85 g NH3 D. 95 g NH3

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

Q: Which of the following is incorrect?   A. Fluorine will always have an oxidation number of -1 in all…

A: Given  1)   Which of the following is incorrect?   A. Fluorine will always have an oxidation…

Q: 30. In calcium carbonate what is the mass percentage of  oxygen atoms?    A. 68%   B. 12%   C.…

A: Calcium atomic mass = 40. Carbon atomic mass =12. Oxygen atomoic mass = 16. Here three oxygens are…

Q: How many moles of tungsten atoms are in 4.8 x 10^24 atoms in tungsten. a. 8.0x10^0 moles b.…

A: Given: No. of tungsten atoms =  4.8 x 1024 atomsRequired: no. of Moles of tungsten= ?

Q: How many formula units are in 0.761 g of iron(III) nitrate?   A. 1.89 x 1021 f.u.   B. 3.13 x…

A: Interpretation: The amount of formula units are in 0.761 g of iron(III) nitrate is to be calculated.

States of Matter

The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates). 

Chemical Reactions and Equations

When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.