Comment
I'm going to use rounded numbers to calculate the molar mass of water.
Water Molar Mass
- 2H = 2 * 1 = 2
- 1O = 1 * 16 = 16
- Molar Mass = 18 grams / mole
Moles of water
- given mass = 9.176 grams
- Molar Mass = 18 grams / mole
- moles = ??
Formula
moles = given mass / molar mass
moles = 9.176 / 18
moles 0.5098 Answer
Answer:
A physical change is a change from one state of matter to another; a chemical change results in a new substance formed.
<u><em>Physical properties:</em></u>
Physical properties are those which have same composition. In other words, composition does not change, only state may be change like solid to liquid, liquid to gas, solid to liquid etc.
<u><em>Example. </em></u>
Water when freezes into ice, it is physical change, just state is change.
<em><u>Chemical properties:</u></em>
The chemical properties depend upon composition.
<u>Example:</u>
Formation of precipitates is an example of chemical change.
Answer:
%age Yield = 42.9 %
Explanation:
Percentage Yield is defined as the actual yield divided by theoretical yield. It is given as,
%age Yield = Actual Yield / Theoretical Yield × 100 --- (1)
Also,
Actual Yield is the amount of desired product which is obtained after an experiment is completed. We can also call it the real yield which is obtained practically. While, theoretical yield is the yield which is calculated on paper. Hence, we can say that the actual yield is always less than theoretical yield due to many reasons including reaction conditions and researcher handling problems.
Thus we are given following data;
Theoretical Yield = 1.70 g
Actual Yield = 0.73 g
Putting these values in Eq. 1,
%age Yield = 0.73 g / 1.70 g × 100
%age Yield = 42.9 %
An ionic bond is formed between metal and non metal when they exchange electrons.
The opposing bond would be covalent which is formed between non metal and non metal.
To form an ionic bond, pair any two metal and non metal that will exchange electrons such as LiBr, NaCl, etc.
Hope this helps!