Answer:
rate = kxyz
Explanation:
It is worth knowing that the rate low can only be determined by experimentation only not by just balancing equations. So here we are told that all the reactants x , y and z are all first order. This is important because we use this as exponents. That is why the exponents of all the reactants will be 1.
rate = kxyz
Answer:
Atomic #: 82
Mass #: 206
Charge: 4+
# of protons: 82
# of electrons: 78
# of neutrons: 124
Explanation:
Atomic #: look at the bottom left #, it's always the atomic #.
Mass #: look at the top left # it's always the mass #.
Charge: they give you the charge which is shown on the upper right of the element.
# of protons: is the atomic #
# of electrons: also the atomic # minus 4 bc the charge is a positive 4, indicating that some electrons 'left'.
# of neutrons: 206 (mass # is protons + neutrons) minus 82 (atomic#) which is 124.
Answer:
193.07 g / mol
Explanation:
Molar mass of (NH₄)₃ = 3 * (14.01 + 4 * 1.01) = 54.15
As = 74.92 and O₄ = 4 * 16 = 64
Answer is 54.15 + 74.92 + 64 = 193.07
<em><u>Given:</u></em>
Weight of Li2CO3 = 154 g
<em><u>To find:</u></em>
number of moles of Lithium Carbonate Li2CO3 = ?
<em><u>Solution:</u></em>
first we have to calculate the molar mass of Lithium Carbonate,
The elemental composition of Li2CO3
Li = 2 units, Atomic weight of each Li atom is 7 g/mol
Li = 2 × 7 = 14 g/mol
C = 1 unit, Atomic weight of Carbon is 12 g/mol
O = 3 units, Atomic weight of each O atom is 16 g/mol
O = 3 × 16 = 48 g/mol
Atomic weight of Li2CO3 = 14+12+48 = 72 g/mol
now,
Number of moles = 154/72 = 2.14 moles
<u>Answer- The number of moles of Lithium Carbonate is 2.14 </u>
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3 moles of H2O *18g H2O/1 mol H2O
= 54 g H2O
