Intersecting
n95
Pns 70
Nsr95
Npr158
Perpendicular ebd is 90
Answer:
980C
Explanation:
but it need a scale tell me the scale
Answer:
A rule of thumb is that 1.5 lbs. of baking soda per 10,000 gallons of water will raise alkalinity by about 10 ppm. If your pool's pH is tested below 7.2, add 3-4 pounds of baking soda. If you're new to adding pool chemicals, start by adding only one-half or three-fourths of the recommended amount.
four covalent bonds in SiO2
