Answer:
Bonding electron pairs
Explanation:
Sulfate (SO₄²⁻)
Valence electrons of sulfur = 6
Valence electrons of oxygen = 6
Charge = 2 (Negative which means that the electrons are being added)
The total number of the valence electrons = 6 + 4(6) + 2 = 32
The Lewis structure is drawn in such a way that the octet of each atom and duet for the hydrogen in the molecule is complete. So,
The Lewis structure is:
<u>Since, all the electrons pairs around the central atom, sulfur is bonded. So, the electron pairs are bonding electron pairs.</u>
Cccccccccccccccccccccccccccc
Answer:
b
Explanation:
because I had that on my homework and got it correct
Answer:
Energy in foods is provided by macro-nutrients.
Explanation:
Nutrients are “environmental substances” used for growth, energy, and bodily functions of the organisms. Those nutrients that are required in larger amounts are called macro-nutrients.
There are 3 macro-nutrients needed by humans: lipids (fats), carbohydrates (sugar) and proteins. All these macro-nutrients gives energy in form of “calories”. For example:
- In carbohydrates, there are '4 calories' of energy per gram.
- In proteins, there are '4 calories' of energy per gram.
- And in lipids, there are '9 calories' of energy in one gram.
This means that if you look at a food label and it lists 10 grams of carbohydrates, 0 grams of protein, and 0 grams of fat, that food would contain 40 calories.
P*V=n*R*T (Pressure*Volume = mol * 0,082 (constant)* temperature )
175 kPa = 1,727 atm
V=275 ml = 0.275 liters
T=(P*V)/(n*R)=1,727*0.275/0.8*0.082=7,23 Kelvin.