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4.0 moles Cu (6.022 X 1023/1 mole Cu)
= 2.4 X 1024 atoms of copper
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∙ 10y ago
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How many moles of the element oxygen are in 4.00 moles of the compound K2Cr2O7?
The formula means, among other things, that there are 7 atoms of oxygen in each mole of the compound. Therefore, in 4.00 moles of the compound, there are 28.00 moles of oxygen atoms. Elemental oxygen usually is diatomic, so that there would be the equivalent of 14 moles of diatomic elemental oxygen.
What do images of atoms and molecules show?
The empiracle formula shows the ratio of the individual elements in a compound, and the molecular formula shows the actual number of each elemental atom in each molecule (which will be equal to the empiracle formula or a whole number multiple of it). However, it is the structural formula that shows how the individual atoms are connected.
Does an equation indicates the number of atoms of each product and each reactant involved in a reaction?
Not quite. A properly balanced an equation indicates the number of atoms of any elemental product and any elementalreactant involved in a reaction, along with the number of molecules of any molecular compound product and any molecular compound reactant involved in the reaction. The original sentence is deficient because in any chemical reaction, there must be at least one non-elemental product or reactant.
A silver sample contains 52 atoms each having 60 neutrons and 48 atoms each having 62 neutrons What is the sample's average atomic mass?
The total mass of all the silver atoms would be 10,770,65(47+60) + 35(47+62) = 10,770 The total number of silver atoms is 100, 65 + 35 = 100 Dividing the total mass by the number of atoms gives us a 10770/100 = 107.7 for an atomic mass by these numbers.
What is importance of naming chemical formula?
A compound is a substance made up of a definite proportion of two or more elements. A chemical formula tells us the number of atoms of each element in a compound. It contains the symbols of the atoms of the elements present in the compound as well as how many there are for each element in the form of subscripts
What is the structures of hydrogen?
In its elemental form hydrogen consists of diatomic molecules, each containing two hydrogen atoms.
How does chemical equations show a conservation of mass?
A properly written chemical equation will always show the same number of atoms of each elemental on each side, showing that no atoms are created or destroyed in the chemical reaction.
How many atoms of nitrogen N are in C8H10N4O2?
The elemental symbol for nitrogen, N, occurs only once in the formula and it has the subscript 4. This shows that there are four atoms of nitrogen in each molecule of the formula.
How many moles of the element oxygen are in 4.00 moles of the compound K2Cr2O7?
The formula means, among other things, that there are 7 atoms of oxygen in each mole of the compound. Therefore, in 4.00 moles of the compound, there are 28.00 moles of oxygen atoms. Elemental oxygen usually is diatomic, so that there would be the equivalent of 14 moles of diatomic elemental oxygen.
What is chlorine made out of?
Since chlorine is an element it is simply composed of chlorine. More specifically chlorine in its elemental form is made up of molecules of two chlorine atoms each.
Why is platinum in a catalytic converter a element?
When a substance is an element, every single atom in that substance has the same number of protons. For instance, graphite is simply elemental carbon because every atom in graphite is a carbon atom. Water is not an element because each molecule of water contains two hydrogen atoms and one oxygen atom. Pure platinum is made up of many atoms with exactly 78 protons each bound together. Platinum atoms can be found in a few forms. To list a few, it can be combined with other metals in an alloy, it can be combined with certain atoms as a salt (platinum dioxide for instance), it can be found in a solution as an ion (Pt2+ for example), and it can be found as a pure sample of just plain old platinum. This is the case in your catalytic converter. When atoms bond chemically, their electrons interact. This changes their properties. In the catalytic converter, only platinum in the elemental form has the right chemical properties to change carbon monoxide into carbon dioxide, for example. This is why manufacturers use elemental platinum instead of something else. For an example of platinum that's not elemental, platinum dioxide is used as a different catalyst to make hydrogenated vegetable oils. It's not an element because it is bound to atoms with different numbers of protons (oxygen atoms). Hope this helps!
What do images of atoms and molecules show?
The empiracle formula shows the ratio of the individual elements in a compound, and the molecular formula shows the actual number of each elemental atom in each molecule (which will be equal to the empiracle formula or a whole number multiple of it). However, it is the structural formula that shows how the individual atoms are connected.
Does an equation indicates the number of atoms of each product and each reactant involved in a reaction?
Not quite. A properly balanced an equation indicates the number of atoms of any elemental product and any elementalreactant involved in a reaction, along with the number of molecules of any molecular compound product and any molecular compound reactant involved in the reaction. The original sentence is deficient because in any chemical reaction, there must be at least one non-elemental product or reactant.
A silver sample contains 52 atoms each having 60 neutrons and 48 atoms each having 62 neutrons What is the sample's average atomic mass?
The total mass of all the silver atoms would be 10,770,65(47+60) + 35(47+62) = 10,770 The total number of silver atoms is 100, 65 + 35 = 100 Dividing the total mass by the number of atoms gives us a 10770/100 = 107.7 for an atomic mass by these numbers.
How many Cu atoms are in the 0.0159 mol sample?
The molar mass of copper is approximately 63.5 g. To find how many of these are in our sample we must divide.0.0159/63.5 = 2.5 x 10 ^ -4 = 0.00025 moles. Each mole contains the Avogadro number of atoms, i.e. 6.023 x 10 ^ 23, so in total we have 0.00025x 6.023 x 10 ^ 23 = 1.51 x 10 ^ 20 atoms approximately.
Which quantity must always be the same on both sides of a balanced chemical equation?
The numbers of atoms of each elemental type, as represented by their element symbols, will always be the same on both sides of a balanced chemical equation.
WHAT IS THE ELECTRONCONFIGURATION FOR THE ELEMENTAl?
Each element has a specific electron configuration.
