Answer:
1. unless you live right around the block, distance from home to school should be in kilometers.
2. centimeters
3. millimeters
4. meters (the average is about 2 meters)
Answer:
1.60.
Explanation:
- The no. of millimoles of HCl = MV = (0.15 M)(20.0 mL) = 3.0 mmol.
- The no. of millimoles of KOH = MV = (0.10 M)(20.0 mL) = 2.0 mmol.
<em>Since the no. of millimoles of HCl is larger than that of KOH. The solution is acidic.</em>
<em></em>
∴ M of remaining HCl [H⁺] remaining = (NV)HCl - (NV)KOH/V total = (3.0 mmol) - (2.0 mmol) / (40.0 mL) = 0.025 M.
∵ pH = - log[H⁺]
<em>∴ pH = - log[H⁺] </em>= - log(0.025) = <em>1.602 ≅ 1.60.</em>
Answer:
It occurs naturally in a variety of sources, such as stinging ants, nettles, pine needles, and sweat.
Explanation:
methanoic acid (formic acid, HCOOH) Colourless, corrosive, pungent, liquid carboxylic acid. It is used to produce insecticides and for dyeing, tanning, and electroplating. It occurs naturally in a variety of sources, such as stinging ants, nettles, pine needles, and sweat
Your answer is A. When I balance equations, I take inventory of what I have on each side and how many I have. So in the first equation you have 2 Na on both sides. You have 1 Cl on both sides. You have 2 Hydrogens on both sides. You have 1 SO4 on both sides. Therefore, both sides of the equation are equal AKA balanced.
Also, when balancing equations, it's easier to leave your sulfates, sulfites, phosphates, phosphites, etc. in their formula because it's easier to balance.
I hope I was able to help. Best of luck!
Answer:
all of these are properties of metalloids