A sample of a compound made of elements A and B was analyzed to contain 2.456 g of A and 1.714 g of B. How many grams of B is there in another sample of the compound that has a mass of 4.172 pounds?

Q: 15. This ForeverspinTM top os made of pure carbon, with an Atomic Mass of 12. This top weights 9…

A: P

Q: Freya weighs an empty crucible and finds it to have a mass of 95.83 g (including the lid). After…

A: 1. Mass of the hydrate to start with = Mass of beaker with hydrate - Mass of empty beaker = 95.83 g…

Q: In Section 1.10, it was stated that 1 mol of sand grains would cover the state of Texas to several…

A: SOLUTION: Step 1: Simple Volume of 1 sand grain = (0.10 mm)3 = 0.001 mm3. 1 mole of sand =…

Q: What mass of iron (d = 7.874 g/cm') does a 2.0 in x 1.5 in x 10.0 in sample have?

A: Given  density of Iron = 7.874 gram/ Cm3 Volume = 2.0 inch × 1.5 inch × 10 inch 1 inch   = 2.54 Cm…

Q: The radius of a lead atom is 175 pm. How many lead atoms would have to be laid side by side to span…

A: Given: Radius of each lead atom = 175 pm = 175 X 10-12 m                          (Since 1 m = 1012…

Q: When a 12.259-g sample of a compound containing only copper and oxygen was decomposed it produced…

A:

Q: Naturally occurring cobalt consists of only one isotope, 58.9332. A synthetic radioactive isotope of…

A: From given data;  Initially % of 60Co is determined and then weight of 60Co is calculated as…

Q: Which accurately show the law of conservation of matter (mass)? A) when 2 oxygen molecules…

A: There is a mistake in the question. The mass of clay should be 12 gm before cutting it into two. I'm…

Q: . Polonium-210 is an alpha-emitting radioactive isotope that causes irreversible damage to organs…

A: Two questions based on nuclear reactions and general chemistry that are to be accomplished.

Q: what is the mass in grams of 125 iron atoms?

A: Given that: Number of iron atoms = 125 Atomic mass of iron =  55.845 g/mol

Q: A compound of iodine and cesium contains 63.94 g of metal and 61.06 g of nonmetal. How many grams of…

A: Given: Mass of metal= 63.94g Mass of nonmetal= 61.06g Mass of compound= 38.77g To find: Mass of…

Q: A sample of Cl 2O was composed of 5.921 g of chlorine and 5.342 g of oxygen. How many grams of…

A: Given: In sample 1, Mass of Cl in Cl2O = 5.921 g. And Mass of O in sample 1 Cl2O = 5.342 g. And in…

Q: What is the edge length (in cm) of a titanium cube that con- tains 2.55 x 1024 titanium atoms? The…

A: Calculate the number of moles as follows, Number of moles =2.41×10246.022×1023=0.4×10=4 moles Now,…

Q: (dehydration). A 48.43 gram sample of a hydrate of CaSO4 was heated thoroughly in a porcelain…

A: Weight of hydrated CaSO4 = 48.43 gm Weight of anhydrous CaSO4 = 38.30 gm

Q: How many grams of CCl4 will contain 36.00 g of carbon? express your answer in decimal notation.

A: Mole of carbon tetrachloride is equal to mole of carbon

Q: An atom of rhodium (Rh) has a diameter of about  2.7×10−8cm2.7×10−8cm   If the atom is assumed to…

A: The diameter of the rhodium atom is = 2.7×10-8 cm The volume of rhodium atom in m3 is =?

Q: This picture represents Atoms of an element O Molecules of an element O Molecules of a compound A…

A: An atom is a single entity whereas a molecule consists of two or more atoms. Atoms in a molecule…

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

A:

Q: A 4.450 g sample of hydrated lithium iodide, LiI·xH2O, is dried in an oven. When the anhydrous salt…

A: The water of crystallization is having a fixed number of water molecules present in one formula unit…

Q: Which one contains more oxygen atoms? 22 grams of carbon dioxide or 18 grams of water?

A: Given: Mass of carbon dioxide (CO2)=22 g Mass of water (H2O)=18 g To find: which contains more…

Q: Gold (Au) has a density of 19.32 g-cm-3. If a spherical gold nanoparticle has a diameter of 50 nm…

A: Density of Gold nanoparticle is 19.32 g/cm3 and its volume is 7*104 nm3.

Q: The mass of Cu (63.55 g/mol) used to create Cu2S was 16.95 grams. what theoretical mass of Cu2S…

A:

Q: A sample of lead contains 8.88 x 1015 micrograms. How many atoms does this sample contain?

A:

Q: Do you round before or after multiplying the molecular mass of an element for example I multiplied…

A: Given  Molar mass of Carbon =12.011  Then Molar mass of  C12 =?

Q: A sample of chloroform is found to contain 12.0 g of carbon, 106.4 g of chlorine, and 1.01 g of…

A: According to law of constant proportional, any chemical compound will always contain the elements in…

Q: A hydrated compound with a mass of 7.00g is heated. Its mass after heating is 5.63g. What is the…

A:

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: What is the mass of 4.00 cm^3 of sodium, with a density of 0.97 g/cm^3?

A: MATHEMATICAL TREATMENT OF MEASUREMENT RESULTS Learning Objectives By the end of this section, you…

Q: - Compare Two compounds that contain copper and chlorine have the following masses: Compound A:…

A:

Q: Jotmest Atoms are the smallest spherical particles that make up any matter. If 6.0x1023 atoms of…

A: Introduction: Atomic mass is an average of the masses of a number of different atoms.It is also…

Q: A sample of chloroform is found to contain 12.0 g of carbon, 106.4 g of chlorine, and 1.01 g of…

A: According to the law of multiple proportions two or more elements are combined to form a compound in…

Q: A sample of H2SO4 contains 2.02 g of hydrogen, 32.07 g of sulfur, and 64.00 g of oxygen. How many…

A:

Q: Tennessine has two naturally occurring isotopes.  Tennessine-293 has an atomic mass of 292.9498 and…

A: Given  Atomic mass of Tennessine -293 ( m1 )  = 292.9498 amu Atomic mass of Tennessine - 296 ( m2 )…

Q: When working in the lab, I take the mass of a sample of ammonium (NH3) and I find it to have a mass…

A: The mass of ammonia is = 45.74 g The mass of nitrogen is =? The mass of hydrogen is =?

Q: Student K was asked to determine whether his bar was made of pure palladium.  II) Student S was…

A:

Q: Atoms are the smallest spherical particles that make up any matter. If 6.0x1023 atoms of aluminum…

A: Step : 1            Calculate the mass of 1 atom of aluminium in picograms.

Q: what is the mass in grams of 1.49 x 10^17 chromium atoms?

A:

Q: A compound of iodine and cesium contains 63.94 g of metaland 61.06 g of nonmetal. How many grams of…

A: Metal is the element that has a tendency to donates electrons and conducts electricity while…

Q: It is often possible to change a hydrate into an anhydrous compound by heating it to drive off the…

A: Given: Mass of KF hydrate i.e. KF·nH2O = 31.43 g. And the mass of anhydrous KF after heating = 19.40…

Q: O CHEMICAL REACTIONS Interconverting number of atoms and mass of compound Calculate the number of…

A: Mass of forsterite (Mg2SiO4) = 80.0 g  Number of magnesium atoms = ?

Q: Which is considered an elemental substance? A.CO (carbon monoxide) B.H2O (water) C.I2 (iodine) D.A…

A: Given,CO (carbon monoxide)H2O (water)I2 (iodine)A and C are elemental substances.All of the above…

Q: The density of MgO is 3.6 g/cm3. The atomic masses of magnesium and oxygen are 24.31 g, and 16 g,…

A: Given that Density of MgO = 3.6 g/cm3 Molecular weight of MgO = (1* 24.31) + (1 *16) = 40.31 g/mol

Q: An atom of a particular element has a volume of 7.8 X 10-31 m3. What is this volume in cubic…

A: Find volume of atom in cubic nanometre

Q: A compound of copper and sulfur contains  94.16 g  of metal and  47.01 g  of nonmetal. How many…

A: Here metal is copper and non metal is sulphur.  The mass percent of copper and sulphur are…

Q: The mass of a single aluminum atom is 4.48×1023 grams. How many aluminum atoms would there be in 185…

A: Given that, The mass of a single aluminum atom is 4.48×10-23grams = (4.48×10-23×103)milligrams =…

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: What is the mass of phosphorus in a 45 kg person? mass of P = %3D TOOLS x10

A:

Q: A 42.20 gram sample of a hydrate of CoCl, was heated thoroughly in a porcelain crucible, until its…

A: We can determine the fomula by calculating the number of moles of CoCl2 and water present.

Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.