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- What is the mass in grams of each of the following samples? (a) 1.505 mol of Ti (b) 0.337 mol of Na (c) 2.583 mol of U
Problem 124
- How many moles are in each of the following samples? (a) 11.51 g of Ti (b) 29.127 g of Na (c) 1.477 kg of U
Problem 125
- If the atomic weight of an element is x, what is the mass in grams of 6.02 x 10^23 atoms of the element? How does your answer compare numerically with the atomic weight of element x?
Problem 126
- If the atomic weight of an element is x, what is the mass in grams of 3.17 * 1020 atoms of the element?
Problem 127
- If 6.02 * 1023 atoms of element Y have a mass of 83.80 g, what is the identity of Y?
Problem 128
- If 4.61 * 10^21 atoms of element Z have a mass of 0.815 g, what is the identity of Z?
Problem 129
Problem 130a
Refer to Figure 2.10 showing a schematic illustration of a mass spectrometer. (a) What is the purpose of bombarding the gaseous atoms with an electron beam?
Problem 130b
Refer to Figure 2.10 showing a schematic illustration of a mass spectrometer. (b) Compare two ions with a +1 charge traveling through the curved, evacuated tube in the mass spectrometer. Will a heavier ion or lighter ion be deflected to a greater degree by the magnetic field?
- Use the data from the mass spectrum of a sample of an element to calculate the element's atomic weight. Identify the element.
Problem 132
- Use the data from the mass spectrum of a sample of an element to calculate the element's atomic weight. Identify the element.
Problem 133
- How many protons and electrons are in each of the following ions? (a) Be2+ b) Rb+ c) Se2- (d) Au3+
Problem 138
- What is the identity of the element X in the following ions? (a) X2+, a cation that has 36 electrons (b) X-, an anion that has 36 electrons
Problem 139
Problem 141
Lactic acid, a compound found both in sour milk and in tired muscles, has the structure shown. What is its chemical formula?
Problem 146a
Give systematic names for the following binary compounds: (a) CsF
Problem 146b
Give systematic names for the following binary compounds: (b) K2O
Problem 146c
Give systematic names for the following binary compounds: (c) CuO
Problem 146c
Give systematic names for the following binary compounds: (c) CuO
Problem 147a
Give systematic names for the following binary compounds: (a) BaS
Problem 147b
Give systematic names for the following binary compounds: (b) BeBr2
Problem 147c
Give systematic names for the following binary compounds: (c) FeCl3
Problem 149
Write formulas for the following binary compounds: (a) Vanadium(III) chloride (b) Manganese(IV) oxide (c) Copper(II) sulfide (d) Aluminum oxide
Problem 150
Write formulas for the following compounds: (a) Calcium acetate (b) Iron(II) cyanide (c) Sodium dichromate (d) Chromium(III) sulfate (e) Mercury(II) perchlorate
Problem 151
Write formulas for the following compounds: (a) Lithium phosphate (b) Magnesium hydrogen sulfate (c) Manganese(II) nitrate (d) Chromium(III) sulfate
Problem 152a
Give systematic names for the following compounds: (a) Ca(ClO)2
Problem 152b
Give systematic names for the following compounds: (b) Ag2S2O3
Problem 152c
Give systematic names for the following compounds: (c) NaH2PO4
Problem 152d
Give systematic names for the following compounds: (d) Sn(NO3)2
Problem 152e
Give systematic names for the following compounds: (e) Pb(CH3CO2)4
Problem 152f
Give systematic names for the following compounds: (f) (NH4)2SO4
Problem 153
Name the following ions: (a) Ba2+ (b) Cs+ (c) V3+ (d) HCO3- (e) NH4 (f) Ni2+ (g) NO2- (h) ClO2- i) Mn2+ (j) ClO4-