1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
nikitadnepr [17]
3 years ago
13

A sample of 0.281 gg of an unknown monoprotic acid was dissolved in 25.0 mLmL of water and titrated with 0.0950 M NaOH NaOH. The

acid required 30.0 mLmL of base to reach the equivalence point.What is the molar mass of the acid?
Chemistry
1 answer:
tensa zangetsu [6.8K]3 years ago
5 0

Answer:

98.6 g/mol.

Explanation:

Equation of the reaction

HX + NaOH--> NaX + H2O

Number of moles = molar concentration × volume

= 0.095 × 0.03

= 0.00285 moles

By stoichiometry, 1 mole of HX reacted with 1 mole of NaOH. Therefore, number of moles of HX = 0.00285 moles.

Molar mass = mass ÷ number of moles

= 0.281 ÷ 0.00285

= 98.6 g/mol.

You might be interested in
Compute 4.659×104−2.14×104. Round the answer appropriately.
antiseptic1488 [7]
<span>The answer is 2.519 × 10^4. Use the distributive property: a × x + b × x = (a + b) × x. If a = 4.659, b = 2.14, and x = 10^4, then 4.659 × 10^4 − 2.14 × 10^4 = (4.659 - 2.14) × 10^4. Now, subtract numbers in parenthesis: 4.659 × 10^4 − 2.14 × 10^4 = (4.659 - 2.14) × 10^4 = 2.519 × 10^4.Hope this helps. Let me know if you need additional help!</span>
7 0
4 years ago
When calcium metal is placed in water, hydrogen gas bubbles out, leaving a highly alkaline (basic) solution. Write the balanced
Blababa [14]

Answer:

Ca (s) + 2H₂O (l) →  Ca(OH)₂ (aq)  +  H₂ (g)

Explanation:

When solid calcium reacts with water, it produces the correspondent hydroxid and hydrogen gas.

The hydroxid which is produced, is the calcium hydroxid which is a strong base, that's why you talk about a highly alkaline solution.

Ca (s) + 2H₂O (l) →  Ca(OH)₂ (aq)  +  H₂ (g)

Calcium hydroxide is a strong base, that dissociates in water, as this:

Ca(OH)₂  →  Ca²⁺ (aq)  + 2OH⁻ (aq)

It's a basic solution,  is providing hydroxyl ions to the medium

5 0
3 years ago
name two gases of air which dissolve in water by diffusion what is the importance of this process in nature ?​
Mama L [17]

Carbon dioxide and Oxygen are the two gases of air which dissolves in water by diffusion The oxygen is dissolved in water so that fishes can take in oxygen through water to breathe, this is the biological importance of this process in nature. ... Fizzy drinks contain carbon dioxide dissolved in water.
5 0
3 years ago
One limitation of daltons atomic theory in the study of matter​
yawa3891 [41]

Answer: Now it is proved that the atom consists of particles like electrons, protons, and neutrons.

Explanation: because he did not have the tech we do to understand atoms

5 0
3 years ago
An Aqueous solution is 0.500% by mass ammonia,NH3, and has a density of 0.996g/mL. The molarity of ammonia in the solution is __
SCORPION-xisa [38]

Step 1

Molarity is defined as Moles of solute (NH3) divided by the volume of the solution in L

Molarity (mol/L or M) = moles of NH3/volume of the solution (L) (1)

---------

Step 2

The moles of solute (NH3):

0.500 % by mass means:

0.500 g/100 g solution

Moles of NH3 are calculated as:

Mass of NH3/molar mass NH3 = 0.500 g/17.0 g/mol = 0.029 moles NH3

(molar mass NH3 = 17.0 g/mol)

----------

Step 2

The volume of solution:

Volume is calculated from density

Density = mass solution/volume of solution

Volume = mass of solution/density = 100 g solution/0.996 g/mL => Volume = 100.4 mL

1L = 1000 mL => V = 100.4 mL = 0.1004 L

-----------

Step 4

From (1)

Molarity = moles of NH3/volume of the solution (L) = 0.029 moles NH3/0.1004 L = 0.289 mol/L

Answer: M = 0.289 M or mol/L

6 0
1 year ago
Other questions:
  • PLEASE HELP
    7·1 answer
  • M=10,V=2 What is the density
    5·1 answer
  • Is the climate change that Greenland is experiencing and will continue to experience a good thing or bad thing for Greenland and
    10·2 answers
  • When a strontium atom loses its valence electrons, it’s has the same electrons configuration as which element
    15·1 answer
  • what do the colors produced by fireworks indicate? a. a physical change c. a state change b. a chemical change d. an element cha
    15·1 answer
  • You subjected the secondary alkyl halides to both SN2 and SN1 reaction conditions. By which mechanism did each alkyl halide reac
    8·2 answers
  • In the decomposition reaction, 1 mole of water (mw = 18.015 g/mol) was produced for every mole of cuo (mw = 79.545 g/mol) produc
    5·1 answer
  • Molten gallium reacts with arsenic to form the semiconductor, gallium arsenide, GaAs, used in light-emitting diodes and solar ce
    15·1 answer
  • How is heavy water different from natural water
    7·2 answers
  • I need the answer to this
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!