X 6.02 3 * 10 23 Ty 1012 - mass 119.35 19.89 of chloro 3. Calculate...
what is the predicted product from the following combination
reaction?
E) none of the above 33) Which of the following produces the characteristic color of a fireworks display? A) atoms exploding B) molecules exploding C) electrons dropping to lower energy levels D) nuclei dropping to lower energy levels E) none of the above Chapter 8 34) How many atoms of cobalt equal a mass of 58.93 g? (Refer to the Periodic Table.) A) 1 B) 27 C) 58.93 D) 59...
3) Calculate the percentage by mass of hydrogen in PtCl2(NH3)2 A) 0.672 B) 2.016 C) 1.008 D) 0.034 E) 1.558 4) How many molecules of CH4 are in 48.2 g of this compound? A) 1.81 x 1024 B) 4.00 C) 2.00 x 1023 D) 4.64 x 1026 E) 5.00 x 10-24 5) A sample of CH2F2 with a mass of 19 g contains A) 9.5 B) 3.3 * 1024 C) 2.2 x 1023 atoms of F. D) 4.4 x 1023...
The number of atoms in one mole of an element is identified as A) 6.02 x 10^-2 atoms B) 6.02 x 10^2 atoms C) 6.02 x 10^23 atoms D) none of the above
1. Which atmospheric component does not contribute to global warming? A. H2O C. N2 D. O 2. Calculate the mass of 2.50 6.02 x 1023 molecules) A. 5.81 10-19g B. r, 16-10-18 g C. 7.00×105 g D. 5.38 x 102 g 104 rmolecules of nitrogen gas. (covert from g to molecules, 3. Find the molar mass of ethanol, C2H6O A. 29.02 g/mol B. 45.06 g/mol C. 46.07 g/mol D. 110.0 g/mol 4. The greenhouse and enhanced greenhouse effects refer to...
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...
Howmany moles of nitrogen gas
are in the tank with nitrogen?
He ( N₂ CH4 Volume 22.4 L Pressure Temperature Mass of gas Number of gas molecules 22.4 L 101.3 kPa 0°C 4.00 g 6.02 x 1023 101.3 kPa 0 °C 28.0 g 6.02 x 1023 22.4 L 101.3 kPa 0°C 16.0 g 6.02 x 1023
(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 <...
calculate the percent composition by mass of aluminum hydroxide
AL(OH)3
M ynt (in g) of nitrogen atoms in 6.14 x 10" molecules of dinitrogen anden 9 2.02g Imor 2204-) -1030 ( IMEL N204-) 16.022x1023 = 9.38 23 x 100 14.01X2 28.02 16*4= 64 Calculate the percent composition by mass of aluminum hydroxide, Al(OH) 34:6% ! anr-2,9x Α1 18 61.5% 3.9% x 3 102% ALY
There are 4.04 x 10^23 molecules of water. Find the mass (g) of the hydrogen atoms contained in it. Show work.
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