Calculate the number of more of the following! a.) 9.25 x 1026 formula units of cache...
12. Calculate the number of moles containing each of the following (a) 1.00 x 1022 atoms of cobalt, Co (b) 2.00 x 1023 molecules of carbon dioxide, CO2 (c) 3.00 x 1024 formula units of cobalt(II) carbonate, COCO,
D Question 2 3.5 pts Calculate the number of hydrogen atoms present in 12.30 x 102 dekagrams of strontium hydrogen sulfate heptahydrate O 2.905 x 1024 O 4.011 x 1025 O 1.191 x 1026 0 2.905 x 1026 5.258 x 1025
49. The sun radiates energy at the rate of 3.85 X 1026 W. Suppose the net reaction accounts for all the energy released. Calculate the number of protons fused per second. Note: Recall that an alpha particle is a helium-4 nucleus.
49. The sun radiates energy at the rate of 3.85 X 1026 W. Suppose the net reaction accounts for all the energy released. Calculate the number of protons fused per second. Note: Recall that an alpha particle is a...
Calculate the molar mass:
The number of formula units found in a 12.91 g sample of Zr(SO_4)_2
Calculate the grams of phosphorous in 1.72 x 1025 formula units of chromium (II) phosphate. Calculate the grams of oxygen in 68.9 g beryllium acetate.
(1) Avogadro's number is 6.02 x 10. Arrange the following samples in order of increasing number of carbon atoms: 12g C; 1 mol C2H2; 9 x 1023 molecules [ 12g C < 1 mol CH3 < 9 x 1023 molecules [2] 12g C < 9 x 10” molecules < 1 mol C2H2 [3] Imol CH3 < 12g PC < 9 x 102 molecules [4] 1 mol CH2 <9 x 10” molecules < 12g C [5] 9 x 10” molecules <...
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(B) The number of formula units present in 200 grams of NaOH. (C) The number of atoms in 200 grams of NaOH. 2.2 7.(A) Determine the number of moles of NaCl present in 2.5 x 10 Formula units
1) Calculate the number of moles of Cl atoms in 3.01×1024 formula units of magnesium chloride, MgCl2. Express your answer numerically in moles. 2) In the gaseous state, chlorine exists as a diatomic molecule Cl2 (Molar mass = 70.9 g/mol). Calculate the number of moles of chlorine present in 100 g of chlorine gas. Express the quantity in moles to three significant figures. 3) Sodium hydroxide, NaOH, is a strong base that is used in industrial synthesis and processes such as...
Calculate the following quantities: (a) mass, in grams, of 1.50 x 10^-2 mol CdS (b) number of moles of NH4Cl in 86.6 g of this substance (c) number of molecules in 8.447 x 10^-2 mol C6H6 (d) number of O atoms in 6.25 x 10^-3 mol Al(NO3)3
The Sun shines with a blackbody temperature of 5780 K and a total power output of 3.8 x 1026 w. The Sun has been doing this for 4.5 x 10 yr, during which time the surface temperature has increased by a few percent and the luminosity by 20%, ie. they have remained roughly constant. (a) (5 marks) Use the heat-flow formula for entropy change to calculate the total entropy in all the sunlight the Sun has ever emitted. (b) (3...