Chemistry Chapter 7.1 and 16.1 – Flashcards

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question
How many valence electrons does a helium atom have?
answer
2
question
What is the gram formula mass of AuCl3
answer
303.6 g
question
Avogadro's number of representative particles is equal to one ____
answer
mole
question
How many valence elections are there in an atom of phosphorus
answer
5
question
How many atoms are there in 3.5 moles of arsenic atoms
answer
2.1x10^24 atoms
question
How many atoms are there in 4.7 moles of hafnium?
answer
2.83x10^24 atoms
question
Which of there elements does not exist as a diatomic molecule?
H, F, I, Ne
answer
Ne
question
How many valence elections does an atom of any halogen have?
answer
7
question
What is the gram formula mass of chromic sulfate, Cr2(SO4)3
answer
392.2 g
question
How many valence elections are there in an atom of magnesium?
answer
2
question
What SI unit is used to measure the number of representative particles in a substance?
answer
mole
question
How many electrons are shared in a dingle covalent bond
answer
2
question
How many moles of silver atoms are there in 1.8x10^-4 atoms of silver?
answer
3.0x10^-4
question
How many electrons are shared in a double covalent bond?
answer
4
question
A diatomic molecule with a triple covalent bond is ____
answer
N2
question
How many hydrogen atoms are in 5 molecules of isopropyl alcohol,
C3H7O
answer
35
question
How many valence electrons are there in a silicon atom?
answer
4
question
How many molecules are there in 2.9 mol Co2
answer
1.75x10^24
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