2 years ago

Is poh level a acid or base

Chemistry

1 answer:

Zolol [24]2 years ago

8 0

It’s a base because it has hydroxide (oh) and not just hydrogen.

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2.40 g of NH4Cl is added to 19.4 g of water. Calculate the molality of the solution.

Sholpan [36]

Molality is the moles of solute per kg of solvent.

Moles of NH₄Cl = 2.4 / (14 + 4 x 1 + 35.5)
= 0.0448 mole

Molality = 0.0448 / (19.4 / 1000)
= 2.31 m

3 0

3 years ago

250 ml glass of lemon juice contains 20 grams of sugar. How much sugar is in 500 ml bottle

iren2701 [21]

There is 40 g of sugar in a 500 ml bottle of lemon juice

<h3>Further explanation</h3>

The concentration of a substance can be expressed in several quantities such as moles, percent (%) weight/volume,), molarity, molality, parts per million (ppm) or mole fraction. The concentration shows the amount of solute in a unit of the amount of solvent.

the concentration of sugar in lemon juice :

$\tt \dfrac{20~g}{250~ml}=0.08~g/ml$