C 1.0 4 points hydrogen atoms in 25 molecules of C.H.S. QUESTION 10 There are c25...
60. The following quantities are placed in a container: 1.5 X 1024 atoms of hydrogen, 1.0 mol of sulfur, and 88.0 g of diatomic oxygen. (a) What is the total mass in grams for the collection of all three elements? (b) What is the total number of moles of atoms for the three elements? (c) If the mixture of the three elements formed a compound with molecules that contain two hydrogen atoms, one sulfur atom, and four oxygen atoms, which...
Question 3 (1 point) oxygen atoms in 30 molecules of C20H42S3O There are A) 1.2 x 1024 B) 3.6 x 1025 C) 60 D) 1.8 x 1025 15 E) 6.0 x 1023 18
Calculate the pH of each solution at 25 ∘C25 ∘C . 1.0×10−5 M HClpH= 0.1 M HNO3pH= 1.0×10−5 M NaOHpH= 0.01 M KOHpH =
1. 24.8 g of oxygen contains a. 9.33 x 1023 oxygen atoms b. 50 amu c. none of these d. 1.49 x 1025 oxygen molecules e. 1.55 mol of oxygen molecules 2. 1.2 moles of oxygen atoms represent a. 0.4 g b. 0.72 x 1024 atoms c. 1.9 x 101 atoms d. 1.0 x 102 g e. none of these
Draw 3 molecules that could exist in nature using the atoms: Carbon (C), Nitrogen (N), Hydrogen (H), and Oxygen (O). Each molecule must contain at least 3 carbon atoms and 1 oxygen atom. Must follow atom specific covalent bonding requirements ( C=4 ; N = 3; O =2; H =1).
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...
One molecule of caffeine contains 8 atoms of carbon, 10 atoms of hydrogen, 4 atoms of nitrogen, and 2 atoms of oxygen. Write the formula for caffeine with the elements in the order that they are given. formula:
There are 4.04 x 10^23 molecules of water. Find the mass (g) of the hydrogen atoms contained in it. Show work.
Classify each aqueous solution as acidic, basic, or neutral at
25 °C25 °C.
Acidic Basic Neutral Answer Bank [OH-]=6.8 x 10-10 [H+] = 1.0 x 10-7 [H+] = 4.7 x 10-5 [H+]=5.7 x 10-11 pH = 5.66 pH = 9.28 [OH-] = 3.1 x 10-3 pH = 7.00 about us careers privacy policy terms of use contact us help
Question 1 (1 point) One molecule of CH3CH2OH contains ___ atoms of hydrogen. Question 2 (1 point) One formula unit of (NH4)3PO4 contains atoms of hydrogen. Question 3 (1 point) 11 molecules of C8H18 contains ____atoms of carbon. Question 4 (1 point) 25 molecules of H3PO4 contain _____ total atoms. Question 5 (1 point) How many formula units of KC2H2O2 are needed in order to obtain 96 hydrogen atoms?