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3 years ago

Concentrations expressed as a percent by mass are useful when the solute is a _____.

Chemistry

2 answers:

elixir [45]3 years ago

4 0

Answer:

Solid

Explanation:

A solid such as sugar can be measured and added to a solute to form a solution. The amount of solute present can be expressed as a percentage.

Westkost [7]3 years ago

3 0

C. Solid

Although molarity is commonly used to express concentrations for reactions in solution or for titrations, it does have one drawback—molarity is the number of moles of solute divided by the volume of the solution, and the volume of a solution depends on its density, which is a function of temperature.

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andrew11 [14]

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8 0

3 years ago

Read 2 more answers

A sheet of gold weighing 8.8 g and at a temperature of 10.5°C is placed flat on a sheet of iron weighing 19.5 g and at a tempera

timofeeve [1]

Answer:

$T = 36.393\,^{\textdegree}C$

Explanation:

The contact between the sheet of gold and the sheet of iron allows a heat transfer until thermal equilibrium is done, which means that both sheets have the same temperature:

$-Q_{iron} = Q_{gold}$

$-(0.008\,kg)\cdot (452\,\frac{J}{kg\cdot ^{\textdegree}C} )\cdot (T-54.4\,^{\textdegree}C) = (0.0195\,kg)\cdot (129\,\frac{J}{kg\cdot ^{\textdegree}C} )\cdot (T-10.5\,^{\textdegree}C)$

$-(3.616\,\frac{J}{^{\textdegree}C})\cdot (T-54.4\,^{\textdegree}C) = (2.515\,\frac{J}{^{\textdegree}C})\cdot (T-10.5^{\textdegree}C)$

$-1.438\cdot (T - 54.4^{\textdegree}C) = T-10.5^{\textdegree}C$

$-1.438\cdot T +78.227^{\textdegree}C = T - 10.5^{\textdegree}C$

$2.438\cdot T = 88.727\,^{\textdegree}C$

The final temperature is:

$T = 36.393\,^{\textdegree}C$

8 0

3 years ago

Read 2 more answers

What is the molar mass of NaCrO4?

Mariulka [41]

Answer:

Molar Mass: 138.9818 g/mol

Explanation:

3 0

3 years ago

A jug contains 2L of milk. Calculate the volume of the milk in m3

stepan [7]

Answer: 0.002 m³

Explanation:

We can use our unit conversions to find the volume in m³.

$2L*\frac{1m^3}{1000L} =0.002m^3$

8 0

3 years ago

Which has the greater polarizing power, Li+ or Be2+ and why?

kvasek [131]

Answer:

Polarizing power refers to an atoms ability to pull an electron toward it, polarizing the atom the electron comes from. Since cations are positive, they are able to attract electrons toward themselves. Anions are negative and so do not attract more electrons.

Therefore, Be2+ has a higher polarizing power because it has a higher quantitiy of protons, hence a higher polarizing power.

4 0

3 years ago