Balance Me
H2 + O2 --> H2O
2H2 + O2 --> 2H2O
How many atoms in a mole of atoms?
6.022x1023 atoms in a mole of atoms.
1 mole of H3PO3 is how many grams?
1 mole = 3(1) + 31 + 3(16) - 82 g
Is Calcium a metal?
How many electrons does Carbon have?
Carbon atomic number is 6, so 6 electrons
Cl2 + KBr --> Br2 + KCl
Cl2 + 2KBr --> Br2 + 2KCl
In the equation 2H2 + O2 --> 2H2O
How many H atoms on the right side of the equation?
There are 2 x 2 = 4 H atoms on the right side of the equation.
2K + 2H2O --> H2 + 2 KOH
If I have 2 moles of K how many moles of H2 will I produce?
1 Mole of H2
Einstein determined that light consisted of packets of energy called What?
How many electrons does K+ have?
K Atomic Number is 19. The + means it lost 1 electron. So it has 18 electrons
CH4 + O2 --> CO2 + H2O
CH4 + 2O2 --> CO2 + 2H2O
How many oxygen atoms on the right side of the equation?
4NH3 + 5O2 --> 4NO + 6H2O
There are 4 + 6 so 10 Oxygen atoms on the right side
2K + 2H2O --> H2 + 2 KOH
If I want to produce 2 moles of H2 how many grams of H2O will I need
2 Moles H2 x (2 moles H2O / 1 mole H2) x (2 + 16)g H2O/ 1 mole H2O =
72 g of H2O
Schrodinger said that electrons were more likely to be found in what?
Given the electron configuration
3p5 What energy level is it?
3
3MnO2 + __________ --> 3Mn + 2Al2O3
A) 4 Al
B) 2 Al2O
C) 2 Al2O3
A) 4 Al
How many hydrogen atoms on the left side of the equation?
Mg(OH)2 + 2HCl --> MgCl2 + 2H2O
2 + 2 = 4 Hydrogen atoms
2H2 + O2 --> 2H2O
If I Have 10 g H2, how many g of H2O will I produce?
10 g H2 x (1 mole H2 / 2 g H2) x (2 mole H2O / 2 mole H2) x (18 g H2O / 1 mole H2O)
= 90 g H2O
Light emitted or absorbed by atoms is in set amounts called ____ what?
quanta
What is the electron configuration of Sulfer?
S is atomic number 16
1s2 2s2 2p6 3s2 3p2x 3p1y 3p1z
NH3 + O2 --> NO + H2O
4NH3 + 5O2 --> 4NO + 6H2O
How many O atoms on the right side of the equation?
2Fe(OH)3 + 3H2SO4 --> Fe2(SO4)3 + 6H2O
4 x 3 + 6 = 18 O atoms
6 Li + N2 --> 2 Li3N
10 mole of Li will produce how many grams of Li3N
10 mole Li x (2 moles Li3N / 6 mole Li) x (35 g LiN / 1 mole Li3N)
= 117g Li3N
What equation did Plank come up with?
hv = Plank's constant (h) times the frequency (v) of the photon being studied. It's the energy E=hv
What is the electron configuration of F-
F is atomic number 9. The negative means it gained 1 electron. So 10 electrons.
1s2 2s2 2p6