Answer:
Chlorine
Explanation:
Each arrow represents one electron. Most of the boxes are filled, meaning they have two electrons. The last box only has one arrow, so it only has one electron. If you add it up, you get 17, which is Chlorine.
Answer:
Sodium ions - Na⁺ - cation
Potassium ions - K⁺ cation
Chloride ions - Cl⁻ anion
Magnesium ions - Mg²⁺ cation
Calcium ions - Ca²⁺ cation
Phosphate ions - P³⁻ anion
Iron ions - Fe²⁺ cation
Zinc ions - Zn⁺ cation
Explanation:
Following is a list of 8 common but essential ions in the cells and fluids of human bodies:
1. Sodium ions helps in regulation and control the level of body fluids
2. Potassium ions help regulate cellular functions
3. Calcium ions are essential for building and maintaining strength bones and teeth. and have role in blood clotting, muscle contraction, and the transmission of nerve signals to cells.
4. Chloride ions are the main anions found outside body cells. They acts as counterions
5. Magnesium ions present in the bones
6. Phosphate ions present in body fluids act as the counterions.
7. Iron
8. Zinc
Answer:
- 13,150.6kJ
Explanation:
CH4 + 2 O2 ------> CO2 + 2 H2O ΔH= – 890 kJ
The ΔH is enthalpy change of combustion , which is the heat is either absorbed or released by the combustion of one mole of a substance.
ΔH=−890 kJ/mol (released in the combustion of one mole of methane)
using the molar mass (in grams )of methane to get moles of sample
(237g × 1 mole of CH4)/16.04g=14.776 moles of CH4
Since 1 mole produces 890 kJ of heat upon combustion, then 14.776 moles will produce
ΔH = 14.776moles of CH4 × 890kJ/1mole of CH4
=13,150.6kJ
Therefore ΔH = - 13,150.6kJ
Answer:
0.96 M
Explanation:
M1 x V1 = M2 x V2
M1 = ?
V1 = 500 mL
M2 = 1.6 M
V2 = 300 mL
Plug in the variables:
(M1)x(500) = (1.6)x(300)
(M1)x(500) = 480
Divide both sides of equation by 500:
M1 = 0.96 M
Answer:
The advantage of the globe is that it promotes visual accuracy. Students need to use a globe frequently if they are to form accurate mental maps. The advantage of the world map is that you can see the entire world at one time. The disadvantage is that world maps distort shape, size, distance, and direction.
Explanation:
miss girl- you could've just looked this up
(just make it look like you typed it)