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postnew [5]
3 years ago
12

A sample of liquid ammonia has a density of 0.7 g/mL. Find the mass of a 20 mL

Chemistry
1 answer:
Jet001 [13]3 years ago
3 0

Answer:

Mass of liquid ammonia is 0.035g.

Explanation:

I hope this will help u

Have a nice day

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Describe the preparation of 2.000 L of 0.0500 M AgNO3 (169.87 g/mol) from the primary-standard-grade solid.
Tanzania [10]

Answer:

Transfer 1.6987 grams of AgNO₃ into a mixing container and add solvent up to but not to exceed 2.000 Liters total volume. Mix and apply as needed.

Explanation:

A simple formula for determining the amount of reagent needed for a specified solution from a manufacturer's 'solid' reagent** is ...

grams solute needed = Molarity x Volume of Solution in Liters x Molecular Weight of solute

Determination of mass of solute needed:

∴ grams AgNO₃ needed* = M·V·mol. wt = (0.0500M)(2.000L)(169.87g·mol⁻¹) = 1.6987 grams AgNO₃

*assumes 100% pure reagent.

Preparation:

Transfer 1.6987 grams of AgNO₃ into a mixing container and add solvent up to but not to exceed 2.000 Liters total volume. Mix and apply as needed.

________________________________

NOTE => FYI => If a manufacturer's liquid form reagent is used, one must divide calculated grams by density of liquid supplied and gives volume in milliliters (ml) needed to prepare a specified solution.

Vol reagent needed for soln prep in milliliters = (Molarity·Volume in Liters·formula wt of reagent)/(density of stock liquid concentrate)

That is,  Vol(ml) = [(M)(V)(f.wt.)] / density of stock

Prep: Transfer needed volume (ml) of liquid stock into mixing vessel and add solvent up to but not to exceed total volume of solution needed.

<em>NOTE => Caution when applying to strong acids. 1st add a small quantity of water such that water + volume of acid is less than total volume needed followed by strong acid, then dilute to the needed total volume. Such prevents solution from overheating because of high rate of ionization and flashing out of container.</em>    

5 0
3 years ago
Zinc metal reacts with hydrochloric acid to produce zinc chloride and hydrogen gas as seen in the chemical equations below:
Sever21 [200]

Answer:

Single Replacement.

Explanation:

8 0
3 years ago
Electron configuration for Ar
timurjin [86]

Answer : The electronic configuration of argon (Ar) is, 1s^22s^22p^63s^23p^6

Explanation :

Element is, Argon (Ar)

Atomic number of argon = 18

The number of electrons = 18

As we know that the number of electrons is equal to the number of protons and the number of proton is equal to the atomic number.

Electronic configuration : It is defined as the arrangement or distribution of electron of atom in a atomic orbital.

Hence, the electronic configuration of argon is,

1s^22s^22p^63s^23p^6

5 0
3 years ago
Which of the following colors of light has the highest energy?
qaws [65]
I believe the answer is red, they have the longest wavelength, and energy.
Hope this helps 
5 0
3 years ago
Read 2 more answers
If the limiting reactant in a chemical reaction is impure, what will happen to the percentage yield of the product?
Elanso [62]

Answer:

it may also become impure,I think.

6 0
2 years ago
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