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Andre45 [30]
3 years ago
6

Why do all atoms of an element have the same atomic number, although they may have different mass numbers?. What do we call atom

s of the same element with different mass numbers?
Chemistry
1 answer:
3241004551 [841]3 years ago
7 0
The isotopes of an element differ in the number or neutrons whereas the number of protons or electrons of a neutral atom stays the same. The molar mass of the element is based on the percent abundances of different isotopes and the individual molar mass of each isotope. 
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Match each term with its definition. The position of an equilibrium always shifts in such a direction as to relieve a stress app
Lina20 [59]

Answer:

The position of an equilibrium always shifts in such a direction as to relieve a stress applied to the system. - <u>Le Chatelier's principle</u>

A molecule that donates a proton when it encounters a proton acceptor. - <u>Bronsted-Lowry acid</u>

Occurs when a reaction involving an acid and its conjugate base is combined with a second reaction involving a base and its conjugate acid. - <u>Neutralization</u>

It ionizes completely when dissolved in water. - <u>Strong acid</u>

The shift in the position of equilibrium caused by the addition of a participating ion. - <u>Common ion effect</u>

It only partially ionizes when dissolved in water. - <u>Weak electrolyte</u>

It is capable of acting as either an acid or a base depending upon the solute. - <u>Amphoteric solvent</u>

The act of self-ionization of a solvent to produce both a conjugate acid and a conjugate base. - <u>autoprotolysis </u>

A chemical species that bears both positive and negative charges. - <u>zwitter ion</u>

7 0
3 years ago
uppose you are titrating an acid of unknown concentration with a standardized base. At the beginning of the titration, you read
sweet-ann [11.9K]

Answer:

V_{base}=18.00mL

Explanation:

Hello,

In this case, since you have both the final and initial volume for the titration procedure, clearly, the used volume is computed by the subtraction between them, since it accounts for the employed volume of the base, it turns out:

V_{base}=20.03mL-2.03mL\\\\V_{base}=18.00mL

Best regards.

4 0
4 years ago
what is the final molarity of a dilute solution of NaOH that is prepared by pipetting 5.00 mL of 7.00 M NaOH into a 100mL volume
Angelina_Jolie [31]

Answer:

M_{diluted}=0.35M

Explanation:

Hello,

In this case, since in a dilution process the moles of the solute must remain unchanged, we use the volumes and molarities as shown below:

M_{diluted}V_{diluted}=M_{concentrated}V_{concentrated}

Clearly, the concentrated solution is 7.00M and the diluted solution is unknown, thus, the concentration of the diluted solution after the dilution to 100 mL is:

M_{diluted}=\frac{M_{concentrated}V_{concentrated}}{V_{diluted}} =\frac{7.00M*5.00mL}{100mL}\\ \\M_{diluted}=0.35M

Best regards.

4 0
4 years ago
Plants, plant life cycles, photosynthesis, plant parts, plant growth is what branch of science
WARRIOR [948]
The study of plants, plant life cycles, photosynthesis, plant parts, etc. is under botany (study of plants).
4 0
3 years ago
How would it affect your results if you used a beaker with residual water in it to measure out your standardized sodium hydroxid
kifflom [539]
Accepting that you're utilizing NaOH answer for its essential properties in corrosive/base science, I can expect that pH is of significance. When you have an institutionalized arrangement of say 1M (molar) focus NaOH arrangement and you put it into a dry burette to do a titration or something, you are expecting that the arrangement has a 1 mol of NaOH for each one liter of arrangement (molarity = mols/liters).
4 0
3 years ago
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