Answer:
a) the element belongs to group 2
b) see image attached
c) Magnesium
d) X3N2
Explanation:
Any ion with the formula X^2+ was derived from group 2 elements. The group two element found in period 3 is magnesium alone.
Since the nitride ion has a valency of -3 and X^2+ has a valency of +2 , then a compound formed between X^2+ and the nitride ion will have the formula X3N2.
Answer:
d≈ 1.15 g/cm^3
Explanation:
The density of an object can be found by dividing the mass over the volume.
d= m/v
The mass of the object is 54.3 grams and the volume is 47.18 cubic centimeters.
m= 54.3 g
v= 47.18 cm^3
Substitute the values into the formula.
d= 54.3 g/ 47.18 cm
Divide.
d= 1.150911403136922 g/cm^3
Let’s round to the nearest hundredth. The 0 in the thousandth place tells us to leave the 5 in the hundredth place.
d ≈ 1.15 g/cm^3
The density is about 1.15 grams per cubic centimeter.
The solubility of a given solute in a given solvent typically depends on temperature. Many salts show a large increase in solubility with temperature. ... A few, such as cerium(III) sulfate, become less soluble in water as temperature increases.
The classification of whipped cream is a foam.
So, option C is correct one.
The whipped cream is a colloid and it consists of gas ( dispersed phase ) in liquid ( dispersed medium) system.
Sol is a solid dispersed in the liquid . Examples includes Au , S sol in water , milk of magnesia .
The emulsion is liquid dispersed into the liquid . Example is milk
Foam is a gas dispersed into the liquid . Examples includes whipped cream , shaving cream , foam on the beer .
Gel is the liquid dispersed into the solid . Examples includes , butter , jellies .
To learn more about colloid
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Answer:
15.0 mL
Explanation:
Please see the step-by-step solution in the picture attached below.
Hope this answer can help you. Have a nice day!
