Question 19 (1 point) How many molecules of CH4 are in 48.2 g of this compound?...
Question 19 (1 point) How many molecules of CH4 are in 48.2 g of this compound? OA) 2.00 x 1023 OB) 1.81 x 1024 C) 5.00 10-24 D) 4.00 E) 4.64 x 1026
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...
How many molecules of CO2 are there in 132 g of CO2? 1.81 x 1024 2.00 x 1023 3.00 x 1024 none of these
3047 QUESTION 19 1 POINT How many water molecules are generated when 5.0 moles of ammonia react, according to the following equation? 3PbO+2NH33Pb+N2+3H20 Select the correct answer below: 1.2 x 1023 3,0 x 1024 4.5 x 1024 O2.0 x 1024 FEEDBACK Content attribution 1 POINT QUESTION 20 For which of the following three 1 liter solutions will the smallest mass of precipitate be formed when the solution is treated
A 15.0L flask of CH4 is at 30 °C and 0.965 atm. How many molecules of methane are in the flask? Ο 3.50 x 1023 Ο 2.88 x 1022 ο Ο 1.44 x 1023 Ο 3.54 x 1024 Ο 1.77 x 1025
14) How is the reaction shown below best classified? 2NaCl(s) + F2(g) → 2NaF(s) + Cl2(9) A) single-replacement B) combination C) precipitation D) double-replacement E) decomposition 15) 15) How many molecules of water are present in a 5.65 mole sample of water? A) 9.39 x 10-24 molecules B) 1.07 * 1023 molecules C) 3.40 x 1024 molecules D) 4.00 x 1025 molecules E) 4.00 x 1024 molecules
How many molecules are in 1.500 g of riboflavin, C17H20N4O6? A) 4.167 x 10-22 B) 2.400 x 1021 C) 1.066 x 1021 D) 1.067 x 1024 E) 3.400 x 1026
1.93 1026 atoms Question 19 (1 point) What is the mass of 12.04 1023 atoms of O? 0 8.0g O 16g 0 32 g O 17 g Onone of these Question 20 (1 point) What is the mass in grams of 557 copper atoms? 1.46 10-23 g of Cu 5.88 10-20 g of Cu 3.54 104 g of Cu 5.28 1024 g of Cu ID 2.13 1028 g of Cu none of these Question 20 (1 point) What is the...
explanation please 8) How many molecules are present in 4.25 mol of CC14? A) 9.26 x 1024 molecules (B)2.56 x 1024 molecules C) 653.69 molecules D) 153.81 molecules E) 3.69 x 10-23 molecules 9) How many molecules are there in 3.00 moles of NH3? A) 1.00 molecules B) 3.00 molecules C) 17.00 molecules D) 1.20 x 1024 molecules E1.81x 1024 molecules 10) How many molecules are present in 3.25 mol of C2H60? A) 3.25 molecules B) 46.0 molecules C) 1.85...
A) Calculate the number of molecules of CH4 in 72 g CH4. B) The number of grams in 3.33 mol of sodium carbonate is C) 3.44 g of Ca represents how many moles? D) 8.55 x 10-3 moles of an unknown compound has a mass of 0.376 g. The compound could be: