John needed to make 2 liter of 4 molar (M) sodium chloride (NaCI, molecular weig

Question

John needed to make 2 liter of 4 molar (M) sodium chloride (NaCI, molecular weight = 58 gram/mole). How much salt did he have to dissolve? 58 grams 464 grams 580 grams 232 grams Kathy was making liquid growth medium for plants. The pH of the original solution was 8. The optimal pH for plant growth is 6. What was the best compound to add to make it pH=6? KOH (potassium hydroxide, a base) HCI (hydrochloric acid) water none of the above, it is not possible to change the pH How can we best describe the bond between the carbon and oxygen atoms in ethanol (C_2H_6O)? polar covalent bond non-polar covalent bond ionic bond hydrogen bond

Explanation / Answer

5)
M = mass/(molar mass * volume)
4 = mass / (58*2)
mass = 464 g
Answer: b

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