please answer all 06.Using the Stock/New system for naming compounds, what is the name of P205?A. phosphorous (II) oxideB. potassium (V) oxideC. potassium (II) oxideD. phosphorous (V) oxide07.A comparison of calcium sulfate and calcium sulfite shows what?A. both have a monatomic cation and a polyatomic ionB. calcium sulfite has more oxygen atoms than calcium sulfateC. only calcium sulfite contains a polyatomic ionD. only calcium sulfate is arranged in a crystal lattice patternCO2 +Balance the following equation,What is the sum of all the coefficients in the balanced equation?А. 14В. 1708.C2H6 + O:H2.С. 19D. 24What is similar to these two salts NaCl and CaCl, ?A. are good conductors of electricityB. have the same crystal lattice structure09.C. have positive chargesD. are held together by ionic bond

Answered: A. phosphorous (II) oxide B. potassium…

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter2: Chemical Compounds

Section: Chapter Questions

Problem 117QRT

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The element europium exists in nature as two isotopes: 151Eu has a mass of 150.9196 amu, and 153Eu has a mass of 152.9209 amu. The average atomic mass of europium is 151.96 amu. a. Calculate the relative abundance of the two europium isotopes. b. Graph each fractional abundance value as a y-axis value in association with its corresponding mass value on the x-axis. Starting from each x-axis value, where y = 0, draw a vertical line up to the fractional abundance value. The result will approximate the type of visual graph a mass spectrometer would yield for europium in the 150155 amu range.
Give the name of each of the following polyatomic ions. a.HCO3d.OH b.C2H3O2e.NO2 c.CNf.HPO42
A small crystal of CaCl2 that weighs 0.12 g contains 6.5 1020 formula units of CaCl2. What is the total number of ions (cations and anions) that make up this crystal?
Give three examples of gaseous elements that exist as diatomic molecules. Give three examples of gaseous elements that exist as monatomic species.
What is the difference between molecules and compounds? Give examples of each.
Here are the formulas for each substance: Sucrose: C12H22O11C_{12}H_{22}O_{11}C12H22O11 Copper (I) Chloride: CuClCuClCuCl Iodine: I2I_2I2 Potassium Iodide: KIKIKI Our goal is to try to find a pattern for which compounds conduct electricity when dissolved in water, and which don't. One hint is to look for patterns in which kinds of atoms form substances that conduct when dissolved, and which kinds of atoms form substances that don't conduct when dissolved. Here is a periodic table you can use. Let's start by finding the location on the periodic table for the atoms for substances that conduct when dissolved. What do you notice about where the atoms are?
Manganese makes many different compounds with oxygen—six that are stable in air and others that are not. The mass of manganese per gram of oxygen in three of those compounds is given in the table below. Show that these masses are consistent with the law of multiple proportions. Compound Grams Mn per Gram O a 2.2892 2 2.5753 iii 0.98107
A cube of sodium has length 1.50 in. How many atoms are in that cube? (Note:dNa=0.968g/cm cubed.)
2. A one-carat diamond has a mass of 2.00 x 10 _1 g. Assuming the diamond is made of pure carbon, determine the number of carbon atoms in a one-carat diamond.
Which statement is incorrect? A. All molecules are compounds but not all compounds are molecules. (Semua molekul adalah sebatian tetapi tidak semua sebatian adalah molekul.) B. A molecule is formed when two or more atoms join together chemically. (Molekul dibentuk apabila dua atau lebih atom bergabung bersama secara chemical.) C. A compound is a molecule that contains at least two different elements. (Sebatian adalah molekul yang mengandungi sekurang-kurangkan dua unsur yang berbeza) D. All compounds are molecules but not all molecules are compounds. (Semua sebatian adalah molekul tetapi tidak semua molekul adalah sebatian.)
In 1961, scientists agreed that the atomic mass unit (amu) would be defined as 1/ 12 the mass of an atom of 12C. Before then, it was defined as 1 /16 the average mass of an atom of naturally occurring oxygen (a mixture of 16O, 17O, and 18O). The current atomic mass of oxygen is 15.9994 amu. (a) Did Avogadro’s number change after the definition of an amu changed and, if so, in what direction? (b) Did the definition of the mole change? (c) Did the mass of a mole of a substance change? (d) Before 1961, was Avogadro’s number 6.02x1023 (to three significant figures), as it is today?
How many protons and electrons are there in a neutral atom of each of the following elements? manganese Express your answer as an integer. Np=Ne= iodine Express your answer as an integer. Np=Ne= phosphorus Express your answer as an integer. Np=Ne=

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