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nexus9112 [7]
3 years ago
9

Group 1 includes the alkali metals. what are the general properties of elements in this group

Chemistry
1 answer:
pshichka [43]3 years ago
7 0
The general properties of Group 1 alkali metals are:
1. They form cations. 
2. They are highly reactive. 
3. They have a charge of +1.
4. They form ionic compounds. 
5. When their oxides or hydroxides are reacted in water, they form alkalis i.e. bases. 
6. They are usually soft in nature. 
7. They have low densities. 
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Consider this reaction 2Mg(s)+O2(g) ———> 2MgO(s) What volume (in milliners) of gas is required to react with 4.03 g Mg at STP
nydimaria [60]

The volume of a gas that is required  yo react with 4.03 g mg  at STP  is 1856 ml



calculation/

  • calculate the moles of Mg used

     moles=mass/molar mass

moles of Mg is therefore=4.03 g/  24.3 g/mol=0.1658  moles

  • by use of mole ratio of Mg:O2  from  the equation  which is 2:1

  the moles 02=0.1679 x1/20.0829 moles

  • at STP  1 mole of a gas= 22.4  l

                            0.0895 moles=? L

  • by cross multiplication
  • =0.0895 moles  x22.4 l/  1 mole=1.8570 L

into Ml = 1.8570 x1000=1856  ml  approximately to 1860

6 0
3 years ago
Predict the formula for a compound made from X3 and Y3–.
PolarNik [594]
Well, a compound has a total charge of 0. So, it's electrically neutral. Since the X is 3+ and the Y is 3- they add to 0. Meaning no subscripts are necessary. Why don't you try a different combo?

Like: 

A^3 and B^1-, to get a 3- charge you need 3xB^1- so the formula is AB3

Does this help?  
3 0
3 years ago
Read 2 more answers
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