First things first carbon is quite common element here in Earth. But it is not all, right? Otherwise we would be built from other, more common elements. The thing is in carbon reactiveness. Also energy needed to create carbon chemical compounds isnt that big when compared to etc nitrogen. It can bind up to 4 different elements (atoms). Thanks to this can givesingle, both and triple bindings! Carbon can give away electrons or take them making his degree of oxidation consequently from -IV to +IV. All this vareity leads to vareity of bigger elements that will be created from carbon later- carbohydrates, proteins etc. As life needs vareity to adapt to different situations and climax only carbon therefore can provide this.
Answer:
1.8 J/
g
∘
C
Explanation:
A substance's specific heat tells you how much heat much either be added or removed from 1 g of that substance in order to cause a 1
∘
C change in temperature.
The equation that establishes a relationship between specific heat, heat added or removed.
Answer: The partial pressure of neon is 173 mmHg
Explanation:
According to Dalton's law, the total pressure is the sum of individual pressures.
Given : 
=total pressure of gases = 490 mm Hg
= partial pressure of Helium = 215 mmHg
= partial pressure of argon = 102 mm Hg
= partial pressure of neon= ?
Thus partial pressure of neon is 173 mmHg
Answer:
Fire, Air, Water.
Explanation:
Matter is anything that has mass and occupies space. However, not all form of matter are visible. Air is an example of invisible matter.
Note, electricity does not have mass or does not occupy space. Therefore, electricity is not a matter.
Answer:
CaCl₂
Explanation:
First we <u>convert the given masses of elements into moles</u>, using <em>their respective molar masses</em>:
- 0.900 g Ca ÷ 40 g/mol = 0.0225 mol Ca
- 1.60 g Cl ÷ 35.45 g/mol = 0.045 mol Cl
Now we divide those numbers of moles by the lowest value among them:
- 0.0225 mol Ca / 0.0225 mol = 1
- 0.045 mol Cl / 0.0225 mol = 2
Meaning the empirical formula for the compound is CaCl₂.
