e) If a nickel weighs 5.00 g; then, 1 mol or 6.02 x 10” nickels weigh:...
2. Which of these quantities does not represent 1.00 mol of the indicated substance? a. 6.02 x 1023 C atoms b. 55.85 g Fe c. 12.01 g C d. 15.4 g Zn e. 6.02 x 1023 Fe atoms 3. If 0.274 moles of a substance weighs 6.66 g, what is the molar mass of the substance, in units g/mol? a. 2.28 x 102 g/mol b. 1.71 x 10 g/mol c. 4.38 x 103 g/mol d. 2.17 x 10 g/mol e....
If your friend weighs 150lbs on the earth what would they weigh while standing on the surface of the sun? (Assuming, unrealistically, that they weren’t vaporized of course!) (G = 6.67 × 10-11 N•m 2 /kg2 , R of the sun is 6.955 × 108 m, mass of the sun is 1.989× 1030 kg, 1 ton = 2000 lbs) A. 4 tons. B. 2 tons. C. 1.5 tons. D. 1.5 × 109 tons . E. 1.4 × 1010 tons. Please...
1. The composition of U.S. nickels is m =0.750. Ni 0.250. A nickel can be dissolved in HNOS. then converted with NH to a mixture of complex ions, in much the same way as a penny. Suppose a coin has a mass, men, of 5.000 g. What volume, V , of concentrated (i = 148 mol/L) NH, solution will be required eventually to convert all the Ni to Ni(NH)? Take Ni + 4 NH3 + 2 H20 - Ni(NH3)2+ +...
One molecule of a compound weighs 2.93 x 10-22 g. The molar mass of this compound is: 02.06 g/mol 168 g/mol 176 g/mol 567 g/mol Previous Pago Next Page Page 1 of 28
(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 <...
What is the identity of substance X if 0.380 mol of X weighs 17.5 g? ОА. N2O4 O B. NO3 ос. No2 ор. N20
O e 1.78 x 10-15 molecules QUESTION 9 A mole of a chemical substance represents .6.02 x 1023 chemical particles of the substance b. the mass of the substance that will combine with 100.0 g of oxygen 0 6.02 x 10-23 grams of the substance d. the mass of the substance that will combine with 12.0 g of carbon QUESTION 10 When the following equation is balanced using the smallest possible integers, what is the number in front of the...
2. If the mass of a proton is taken as 1.60 x 10-27 kg and the radius as 1.50 x 10-13 cm, approximately how much would one cubic centimeter (about a thimble-full) of solid nuclear matter weigh? Ignoring the 'gaps' between the spheres simply find the density of a single proton in kg/cm3 and then convert your answer to Tons/cm3, using the conversions that 1 kg weighs 2.20 pounds, 1 Ton equals 2000 pounds.
1. What mass of H2SO4 (H2SO4 = 98.1 g/mol) must be dissolved in 7.34 kg H20 to produce a 2.80 m solution? 2. How many molecules of CzH5OH are in a 6.00 m solution that contains 7.00 kg H20? (Hint: 6.02 x 1023 molecules = 1 mol)
The concentration of dissolved CO2 gas in seawater is 5.00 x 10^–3 mol L–1 . The Henry’s law constant for CO2 at 298 K is 3.13 x 10^–7 mol L–1 Pa–1 . Calculate the partial pressure of carbon dioxide gas in the atmosphere above the ocean. (A) 16.0 kPa (B) 6.30 x 10–5 Pa (C) 1.57 x 10–9 Pa (D) 6.30 x 108 kPa