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2.1. How many molecules are in 2.34 mol of NaOH Na = 23,0=16, H = 1...
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...
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...
Qustion Campleon Status: QUESTION 7 What is the mass of a 4.110-mol sample of sodium hydroxide? Oa. 98.6 g Ob0.1028 g Oc 164,4 g O d.9.732 g Oe. 40.00 g QUESTION 8 A sample of ammonia has a mass of 89.9 g. How many molecules are in this sample? Oa541 x 1025 molecules Ob.5.28 molecules Oc3.18x 1024 molecules Od 1.14 x 1023 molecules x 10-15, molecules QUESTION 9 A mole of a chemical substance represents Oa.6.02 x 1025 chemical particles...
I was wondering if someone could help me with some problems on my test, my teacher allows me to correct them then give them back for 1/2 credit. Along with the correct answer for each id like to know why the answers are wrong and why the new answer is correct. The questiins with a red mark are incorrect. QUINN A coolant widely used in automobile engines is 38.7 % carbon, 9.7 % hydrogen, and 51.6 % oxygen. Calculate the...
How many molecules of HCl are present in 0.250 mol of HCI? Multiple Choice 0 4.15 x 10-25 molecules 0 O 1.51 x 1023 molecules ME NN 0 2.41 x 1024 molecules 0 9.11 molecules 0 0.250 molecules
45) How many iron atoms are present in 0.552 mol of iron? A) 27.98 y old sobilo B) 2.798 x 1024 bolsoba C) 55.85 D) 6.02 x 1023 E) 3.32 x 1023
34. How many molecules of O2 are there in 6.8 mol of O2? a. 218 b. 1.1 x 10-23 C. 4.1 x 1024 d. 4.71 e. 8.9 x 1022
locs are present in a sample of HCl with a mass of 3.65g? 4. How many moles are present in a sa A. 3.46 moles B. 0.100 moles C. 2.19 X 1024 moles D. 10.0 moles 5. How many moles are present in 32.46g of AgNO3? A. 0.191 moles B. 5520 moles C. 5.23 moles D. 32.5 moles 6. How many molecules are present in 18.0g of MgSO4? A. 6.02 X 1023 B. 3.60 X 10-21 C. 4.03 X 1024...
45. Refer to the following equation: 4NH3(g) + 70,() → 4NO2()+6H20() How many moles of ammonia will be required to produce 10.5 mol of water a. 4.20 mol b. 10.5 mol c. 7.00 mol d. 5.25 mol e. none of these 46. Refer to the following equation: 4NH3(Ⓡ) + 702() → 4NO2(%) +6H20(g) How many molecules of NO2 are produced when 4.16 mol of ammonia is completely reacted a. 16.64 b. 5.01 X 1024 c. 2.51 1024 d. 191 e....
D How many moles and how many molecules of zinc chloride are in a weighing 89.5 g? A) 0.432 mol, 2,60 x10-24 molecules B) 0,887 mol, 5.34 x 1023 molecules C)0657 mol, 4.0 x 1023 molecules D) 0.887 mol, 4.0 x 1024 molecules 8) Which of the following underlined items is not an intensive property? A)A chemical reaction requires 3.00 g of oxygen. )Solid copper hydroxide is blue colored C) The density of heliumm at 25 C is 1.64 x...