17 Jul Complete the Lewis structure by dragging bonds and lone electron pairs to their appropriate positions.
The equation for the reaction used to clean tarnish from silver is as follows:
3Ag2S(s) + 2AI(s) —> 6Ag(s) + AI2S3(s)
a. How many grams of aluminum would need to react to remove 0.271 g Ag2S tarnish? _______ g
b. How many moles of AI2S3 would be produced by the reaction ? _____- mol
exercise : DRAWING LEWIS STURCTURES OCTET
H O N O
O
Complete the Lewis structure by dragging bonds and lone electron pairs to their appropriate positions. Click on an atom to remove an electron pair from that atom or click on a bond to change its order. The structure contains 24 valence electrons.
See if you can complete the following table using only what is on this page. Hint: Two of the entries are for the same element.
ELEMENT SYMBOL =
NUCLEAR SYMBOL = 63 / 29 Cu
ATOMIC NUMBER =
MASS NUMBER =
PROTONS =
NEUTRONS =
ELECTRON IN NEUTRAL ATOM =
ELEMENT SYMBOL = Mn
NUCLEAR SYMBOL =
ATOMIC NUMBER =
MASS NUMBER = 56
PROTONS =
NEUTRONS =
ELECTRONS IN NEUTRAL ATOM = 25
ELEMENT SYMBOL =
NUCLEAR SYMBOL =
ATOMIC NUMBER =
MASS NUMBER =
PROTONS = 29
NEUTRONS = 36
ELECTRONS IN NEUTRAL ATOM =
ELEMENT SYMBOL =
NUCLEAR SYMBOL =
ATOMIC NUMBER = 51
MASS NUMBER =
PROTONS =
NEUTRONS = 72
ELECTRONS IN NEUTRAL ATOM =
ELEMENT SYMBOL =
NUCLEAR SYMBOL = 121 / 51 SB
ATOMIC NUMBER =
MASS NUMBER =
PROTONS =
NEUTRONS =
ELECTRONS IN NEUTRAL ATOM =
ELEMENT SYMBOL = C
NUCLEAR SYMBOL =
ATOMIC NUMBER =
MASS NUMBER = 14
PROTONS =
NEUTRONS =
ELECTRONS IN NEUTRAL ATOM = 6
1. a). How many molecules of phosphorus trichloride are present in 1.38 moles of this compound? ______ molecules?
b). How many moles of phosphorus trichloride are present in molecules of this compound? ______ moles?
2. a). How many moles of carbon tetrabromide are present in 1.06 x 10^23 molecules of this compound? ______moles?
b). How many molecules of carbon tetrabromide are present in 4.71 moles of this compound? ______ molecules?
3. a). How many moles of carbon monoxide are present in 2.50 x 10^20 molecules of this compound? _______ moles?
b). How many molecules of carbon monoxide are present in 1.14 moles of this compound? _______ molecules?
4.a). How many moles of nitrogen dioxide, NO2, are present in 3.04 grams of this compound? _____ moles?
b).How many grams of nitrogen dioxide are present in 4.96 moles of this compound? ______ grams?
5. a).How many moles of tetraphosphorus decaoxide, p4o10 , are present in 2.35 grams of this compound? ______ moles?
b).How many grams of tetraphosphorus decaoxide are present in 1.99 moles of this compound? _______ grams?
6. a).How many moles of carbon dioxide, CO2, are present in a sample that contains 5.95 moles of oxygen atoms? _____mol CO2?
b).How many moles of oxygen atoms are present in a sample that contains 2.33 moles of CO2? _______ mol O?
7.a) How many moles of carbon dioxide, CO2, are present in a sample that contains 5.95 moles of oxygen atoms? _____ mol CO2?
b). How many moles of oxygen atoms are present in a sample that contains 2.33 moles of CO2? ______ mol O?
8. a). How many moles of sulfur atoms are present in a sample that contains 1.17 moles of disulfur decafluoride, S2F10? ______ mol S
b) How many moles of S2F10 molecules are present in a sample that contains 5.86 moles of sulfur atoms? _____ mol S2F10
9.a ). How many moles of nitrogen atoms are present in a sample that contains 1.58 moles of dinitrogen tetrafluoride, N2F4? ________ mol N
B). How many moles of N2F4 molecules are present in a sample that contains 4.44 moles of nitrogen atoms? ______mol N2F4
The formula for dinitrogen monoxide is n2o
a).How many grams of nitrogen are present in 3.32 moles of dinitrogen monoxide ? ______ grams
b). How many moles of oxygen are present in 3.41 grams of dinitrogen monoxide? _____ moles
The formula for phosphorus trichloride is PCI3
a). How many grams of phosphorus are present in 2.63 moles of phosphorus trichloride? ______ grams
b). How many moles of chlorine are present in 4.94 grams of phosphorus trichloride? ______ moles
The formula for water is H20
a). How many grams of hydrogen are present in 2.37 moles of water?_______ grams
b). How many moles of oxygen are present in 2.69 grams of water? ______ moles
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