The mole concept - Study guides, Class notes & Summaries

What are the measures in the Imperial system (Hint *FPS) correct answers Foot, pound, seconds What is the Imperial unit for mass (not weight) correct answers slug What are the units in the metric system (hint* MKS, or CGS) correct answers meters, kilograms, and seconds, or centimeters, grams, and seconds What do SI units include? correct answers the MKS system as well as: 1. ampere (A)(unit) - Current (quantity) 2. mole (mol)(unit) - Amount of substance (quanity) 3. kelvin (K)(unit...

General Chemistry Chapter 1 and 2 Test | Latest Update | 2024/2025 | Already Passed What are the main characteristics of matter in terms of its states? The main states of matter are solid, liquid, and gas. Solids have a definite shape and volume, liquids have a definite volume but take the shape of their container, and gases have neither definite shape nor volume, expanding to fill their container. How do you convert between different units of measurement for volume, such as lite...

MCAT General Chemistry (Princeton Review) Questions and Answers | Latest Update | 2024/2025 | Already Passed What is the role of a Lewis acid and a Lewis base in a chemical reaction? A Lewis acid is an electron pair acceptor, while a Lewis base is an electron pair donor. They interact to form a coordinate covalent bond where the base donates an electron pair to the acid. How does the concept of bond enthalpy relate to the strength of a chemical bond? Bond enthalpy (or bond dissoci...

Students' Systematic Errors When Solving Kinetic and Chemical Equilibrium Problems Saouma BouJaoude Department of Science Teaching Syracuse University, Syracuse, NY Introduction Many educational researchers (e.g., Fisher & Lipson, 1983; McDermott, 1988) assert that systematic errors provide important insights about students' thinking processes. Consequently, these insights may help teachers to design effective curricula and more productive remediation and teaching strategi...

Stoichiometry - Part of chemistry that studies amount of substances that are involved in reactions Mole Ratio - Identify how many moles of product are formed from a certain amount of reactant. Molar mass - Defined as the mass of given substance divided by its amount of substance Limiting Reaction - How much of the product is produce Excess Reaction - what is left over Theoretical yield - Quantify of a product obtained from the complete conversion of the limiting reactant in chemical reacti...

General Chemistry 1 Midterm 1 | Latest Version | 2024/2025 | 100% Verified What is the difference between an element and a compound in terms of their chemical composition? An element is a pure substance consisting of only one type of atom, whereas a compound is a substance composed of two or more different types of atoms chemically bonded together. How do you determine the molecular weight of a compound from its chemical formula? The molecular weight of a compound is determined by s...

General Chemistry 1 Chapter 1 Questions and Answers | Latest Update | 2024/2025 | Rated A+ What is the scientific method, and how is it used in chemistry? The scientific method is a systematic approach to research that involves making observations, forming a hypothesis, conducting experiments, analyzing data, and drawing conclusions. In chemistry, it is used to investigate chemical phenomena and develop new theories or technologies. What distinguishes a chemical change from a ph...

To answer this question, you may need access to the periodic table of elements, a calculator, and the equations and charts in the tutorial associated with this question. If 23.6 g of hydrogen gas reacts with 28.3 g of nitrogen gas, what is the maximum amount of product (ammonia, NH₃) that can be produced? [N₂ + 3H₂ --> 2NH₃; N = 14.0 g/mol, H = 1.01 g/mol]  133 g  23.6 g  68.8 g  34.4 g RATIONALE First, write the balanced chemical equation. Then, convert g hydro...

Which is the molar mass of H2O? 18.02 g/mol What is the molar mass of CHCl3? 119.37 g/mol Which best compares 1 mol of sodium chloride to 1 mol of aluminum chloride? Both are made up of 6.02 x 10^23 formula units. Which is the formula mass of (NH4)2SO4? 132.17 amu What is the molar mass of a substance? the mass in grams of one mole of a substance How does the number of molecules in 1 mol of oxygen compare with the number of molecules in 1 mol of nitrogen? ...

A gas cylinder contains exactly 15 moles of oxygen gas (O2). How many molecules of oxygen are in the cylinder? 4.01 × 10^22 molecules 6.02 × 10^23 molecules 9.03 × 10^24 molecules 2.89 × 10^26 molecules 9.03 × 10^24 molecules A sample of sugar (C12H22O11) contains 1.505 × 1023 molecules of sugar. How many moles of sugar are present in the sample? Answer without doing any calculations. 0.25 mol 0.50 mol 1.00 mol 2.50 mol 0.25 mol Use the periodic table to determ...