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enot [183]
3 years ago
8

Which reason best explains why metals are shiny?

Chemistry
1 answer:
alexgriva [62]3 years ago
8 0
Reflection, refracting, and the energy levels of molecular orbitals
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What is the mole fraction of solute in a 3.19 m aqueous solution?
Bumek [7]
Molality= mol/ Kg

if we assume that we have 1 kg of water, we have 3.19 moles of solute. 

the formula for mole fraction --> mole fraction= mol of solule/ mol of solution

1) if we have 1 kg of water which is same as 1000 grams of water. 

2) we need to convert grams to moles using the molar mass of water 

molar mass of H₂O= (2 x 1.01) + 16.0 = 18.02 g/mol

1000 g (1 mol/ 18.02 grams)= 55.5 mol

3) mole of solution= 55.5 moles + 3.19 moles= 58.7 moles of solution

4) mole fraction= 3.19 / 58.7= 0.0543 
4 0
3 years ago
Which element would be expected to have chemical and physical properties closest to those of rubidium?
DIA [1.3K]
Rubidium is an element that belongs to Group 1.  As such it will have physical properties similar to the other Group 1 elements.  Rubidium is below Potassium in the periodic table but above Cesium.  As such it would be most like one of those two elements.

7 0
3 years ago
What is the mass, in grams, 6.5 mol of sodium nitrate (nano3)? please show all work?
ladessa [460]
Mass is the property of a physical body and the resistance to acceleration when a net force is applied on the body.  
The atomic mass of sodium (Na) is = 22.98 
The atomic mass of nitrate (N) is = 14.00 
The atomic mass of oxygen (O) is = 15.99  
The sodium nitrate (NaNO3) consists of the atomic masses of Na+N+(O)3 = 85 grams  
Therefore, the mass of 6.5 mol of sodium nitrate is = 6.5 * 1 mol of NaNO3 
 = 6.5 * (85) 
 = 552.50 grams
6 0
3 years ago
Read 2 more answers
The shape of the land is referred to as
Tomtit [17]
The answer might be terrain, if that helps.
6 0
3 years ago
Which phenomena naturally warms earth lower atmosphere and surface?
Alenkinab [10]

The phenomenon that naturally warms the earth's lower atmosphere and surface is called the greenhouse effect.


Put me as Brainliest!!!

6 0
3 years ago
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