Below are some objectives. Check if each objective possesses the SMART characteristics. If not, please suggest a revision for that objective. 1. know the meaning of atomic number and atomic mass 2. describe, on the molecular level, the effect of heating and cooling on the motion of molecules of a gas 3. identify different atoms

Q: (Review Topics] [Refe Use the References to access important values if neede A compound is found to…

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Q: Determine the number of moles of -2 magnesium used. The atomic weight of .magnesium is 24.3 g/mole

A: Given information is as follows; Mass of Magnesium = 2 g Atomic weight of Magnesium = 24.3 g/mole…

Q: View Policies Current Attempt in Progress A balanced chemical equation contains the term "2Ba(OH)2…

A: Introduction :  Atom can be defined as the smallest unit of matter , it is composed of nucleus and…

Q: Predict the charge of the ion formed by each of the following elements. A) Mg, Express your answer…

A: The atoms of elements attain stable noble gas configuration by losing or by gaining of electrons and…

Q: The principal components in air are oxygen, nitrogen, argon, and carbon dioxide. Air is…

A: The air is composed of 78% nitrogen gas, 21% oxygen gas, 0.93% Argon gas and 0.04% carbon dioxide…

Q: 9. Consider the following compound: FeCl, a. What is the name of the compound? ( b. What is the…

A: " Since you have posted a question with multiple sub-parts , we will solve first three sub-parts for…

Q: The mass spectrometer may be used to A. Electrolyze water B. Detect the presence of isotopes C.…

A: We need to find where mass spectrometry can be used.

Q: Calculate the number of phosphorus atoms in a 60.0 g sample of diphosphorus pentoxide (P,O,). Be…

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Q: When potassium chlorate is burned, potassium chloride and oxygen are formed. A.) Write a balanced…

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Q: What is the "law of conservation of mass" and explain how it relates to why must chemical equations…

A: The ‘law of conservation of mass’ says that mass in an isolated system is neither created nor…

Q: 20. According to the law of conservation of mass: A. energy will be lost during every endothermic…

A: We have been asked the defination of law of conservation of mass

Q: |4. How many hydrogen atoms are present in a molecule of CH3 ? CH3

A: 1o  carbon have 3 H atoms . 2o  carbon have 2 H atoms . 3o have 1 hydrogen shown below.

Q: A 1.546 g sample of magnesium metal is heated in sufficient air at high temperature so that all of…

A: Given : Mass of Mg reacting = 1.546 g Mass of MgO formed = 2.512 g And mass of other Mg compound…

Q: 1. Is mass really conserved during a chemical change? Describe what it means to go through a…

A: All matter can be classified as solid, liquid, and gases mainly. In these physical states of matter,…

Q: a) How many moles of methanol are present in the sample? b) Calculate the number of methanol…

A: Since you asked multiple questions, so as per Q&A guidelines of portal i solved first three part…

Q: which has the correct number of atoms in one molecule of dichlorine momooxide A. contains three…

A: To determine No of Atom in a molecule, we must know the molecular formula of that molecule Then we…

Q: A karat is a measure of gold purity. By definition, 24-karat gold is pure gold. However, gold is…

A: 5) Given: Mass of ring = 6 g. And mass percent of gold in ring = 90 %.

Q: A sample of hydrogen has a mass of 43.9 grams. a. How many H atoms are there in the sample? atoms…

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Q: 2. Consider the compound potassium hypochlorite. a. Write out the formula for potassium…

A: 2. We have to answer the following questions Write the formula of the potassium hypochlorite.…

Q: Consider 1.00 g of Copper (Cu) metal. How many Cu moles are present in this sample? How many Cu…

A: Since moles of element = mass of element / Atomic mass of element  Atomic mass of Cu = 63.5 g/mol…

Q: 19. How many different elements are involved in this reaction? 20. How many atoms are on the left…

A: This is the equation of the combustion of methane. In the equation, right side is the product and…

Q: Determine the number of moles in the given amount of each substance. Show or explain your work. a.…

A: 1 mole of any element / compound contains 6.02 * 1023 atoms / molecules  of that substance. Mass of…

Q: How many moles of sodium hydroxide are needed to neutralize 1.44 moles of sulfuric acid?

A: Given :- No.  of moles of H2SO4 = 1.44  To calculate :- No. of moles of NaOH     When an acid reacts…

Q: Draw a formula unit of calcium chloride and use that to determine the chemical formula of the 5.…

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Q: Which of the following is incorrect?   A. Fluorine will always have an oxidation number of -1 in all…

A: Given  1)   Which of the following is incorrect?   A. Fluorine will always have an oxidation…

Q: Suppose that a compound containing copper and chlorine contains 0.01044 moles of copper and 0.01517…

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Q: A sample of carbon weighting 1.48 g was burned in an excess of air. The mass of carbon dioxide, the…

A: This can be calculated in context to the percent mass of carbon. The reaction occurring in the…

Q: How many entities are present in each of the following? a. 8.44 mol argon atoms b. 1.1 x 10-¹2 mol…

A: For any substance, . In all the questions moles are given. Thus, the number of atoms can be…

Q: An element's percentage of the total mass in a compound containing the element. A law stating that…

A: The composition of a chemical compound is determined using elemental analysis of inorganic elements.…

Q: A 15.12 gram sample of iron is heated in the presence of excess sulfur. A metal sulfide is formed…

A: We have to calculate the empirical formula of the compound

Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.