Chapter 1, Problem 7P

Calculate the number of magnesium atoms in a 60.0 g sample of forsterite (Mg, SiO,). Be sure your answer has a unit symbol if necessary, and round it to 3 significant digits.

QUESTION 1 questions. Just give the answer only. Make sure that your answers are carefully numbered. Give short answers to each of the following questions. Do not copy the (a) A homogeneous mixture which contains water as a solvent is called (b) Ni(CIO4)2·6H2O is hydrated whereas Ni(CIO4)2 is (c) NaCl contains an bond whereas O2(g) contains a bond (d) A homogeneous mixture has a and composition (e) Temperature is an because it does not depend on the amount of substance (f) The maximum number of electrons that an orbital can have is (g) The energy of the lowest level in the H atom is (h) Arrange the following subshells in the H atom in order of increasing energy: 3s 4d 2р 4f 3d 2s 3p (i) Wavelength and frequency of radiation have an relationship (i) In an atom, what is the maximum number of electrons that can have the following set of quantum numbers? n = 4 , m = -1 , ms = +½ (k) Draw a 3dx2- orbital and describe it in your own words. (1) Write the ground state electron configuration…

The following data were obtained when a test tube containing barium chloride hydrate was weighed before and after heating. The heating process drove off the water that was in the sample, producing an anhydrous salt.  a) Mass of an empty test tube = 18.42g b) Mass of the test tube containing hydrate (before heating) = 20.75; c) Mass of the test tube containing anhydrous salt (after heating) = 20.41g  The general formula of barium chloride is BaCl2 · nH2O, where n is the number of water molecules. The hydrate described by the data above either has a value of n=1; n=2; or n =3.  Calculate the mass percent of water for each of these possible values of n

Iodine (I) and fluorine (F) form a series of binary compounds with the following compositions:Compound                  Mass % I            Mass % F1                                   86.979               13.0212                                   69.007               30.9933                                   57.191              42.8094                                    48.829             51.171(a) Compute in each case the mass of fluorine that combines with 1.0000 g iodine.(b) By figuring out small whole-number ratios among thefour answers in part (a), show that these compoundssatisfy the law of multiple proportions.

Is there a difference between a homogeneous mixture of hydrogen and oxygen in a 2:1 mole ratio and a sample of water vapor? Explain.

hat do the coefficients of a balanced chemical equation tell us about the proportions in which atoms and molecules react on an individual (microscopic) basis?

On a periodic chart of the elements, molar mass (M), also called atomic weight, is often listed as though it were a dimensionless quantityFig. . In reality, atomic weight is the mass of 1 mol of the element. For example, the atomic weight of nitrogen Mnitrogen14.0067. We interpret this as 14.0067 g/mol of elemental nitrogen, or in the = English system, 14.0067 lbm/lbmol of elemental nitrogen. What are the primary dim ensions of atomic weight?

Which of the following substances always has the same proportion (i.e. a fixed ratio) of its constituent elements?  (1) Air (2) pure calcium carbonate (3) Brass (4) Saltwater (5) Wood

A student, Ken, is given a mixture containing two carbonate compounds. The mixture includes MgCO, and (NH, ),CO,. The mixture is 69.14% CO, is by mass. What is the mass percent of MgCO, in the mixture? mass percent of MgCO,: とTOOLS x10 3,438 19 ON A tv MacBook Air DD 80 000 000 F12 F8 F9 F10 F11 F7 of