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
riadik2000 [5.3K]
3 years ago
15

O Previous

Chemistry
1 answer:
Ede4ka [16]3 years ago
4 0

Answer:

what is scientific model

Explanation:

You might be interested in
What do acid formulas have in common?
maks197457 [2]

the answer is H is the cation

Explanation :

The general formula of an acid is represented as,  in which 'H' is hydrogen cation and 'X' is a non-metal or a poly-atomic anion.

For example : etc.

All the acids produces hydrogen ion,  in an aqueous solution while the base produces hydroxide ion,  in an aqueous solution.

5 0
3 years ago
Read 2 more answers
Determine the pHpH of an HFHF solution of each of the following concentrations. In which cases can you not make the simplifying
PIT_PIT [208]

The question is incomplete, complete question is :

Determine the pH of an HF solution of each of the following concentrations. In which cases can you not make the simplifying assumption that x is small? (K_a for HF is 6.8\times 10^{-4}.)

[HF] = 0.280 M

Express your answer to two decimal places.

Answer:

The pH of an 0.280 M HF solution is 1.87.

Explanation:3

Initial concentration if HF = c = 0.280 M

Dissociation constant of the HF = K_a=6.8\times 10^{-4}

HF\rightleftharpoons H^++F^-

Initially

c          0            0

At equilibrium :

(c-x)      x             x

The expression of disassociation constant is given as:

K_a=\frac{[H^+][F^-]}{[HF]}

K_a=\frac{x\times x}{(c-x)}

6.8\times 10^{-4}=\frac{x^2}{(0.280 M-x)}

Solving for x, we get:

x = 0.01346 M

So, the concentration of hydrogen ion at equilibrium is :

[H^+]=x=0.01346 M

The pH of the solution is ;

pH=-\log[H^+]=-\log[0.01346 M]=1.87

The pH of an 0.280 M HF solution is 1.87.

6 0
3 years ago
Fungi have eukaryotic cells (large cells with a nucleus), like animals and plants<br> True or false?
Serggg [28]
True your answer is true
8 0
3 years ago
What makes atoms different than<br> ions?
DENIUS [597]

Answer:the term 'atom' in chemistry represents the basic unit of matter that normally exists in a free state and contains all chemical properties. It is an infinite particle that clearly identifies a chemical element. It consists of a positively charged nucleus and is surrounded by negatively charged electrons.

An ion or charge is an atom or group of atoms that has lost or gained one or more electrons. An ion that has a negative charge, when it gains one or more electrons, is called an anion or negative charge, and an ion that has a positive charge when it loses one or more electrons, is called a cation or positive charge.

Explanation:

7 0
3 years ago
Read 2 more answers
Which of the following elements is the most reactive?
Maksim231197 [3]
<span>the following element that is most reactive </span>would be  Fluorine
4 0
3 years ago
Read 2 more answers
Other questions:
  • For the reaction of oxygen and nitrogen to form nitric oxide, consider the following thermodynamic data (Due to variations in th
    11·1 answer
  • Air should be classified as:
    15·1 answer
  • When heated KClO3 decomposes into KCl and O2 (2KClO3----&gt;2KCl+3O2 )if this reaction produced 31.9 g of KCl,how much O2 was pr
    8·2 answers
  • I NEED HELP QUICK! BRAINLIEST TO WHO IS RIGHT!
    10·1 answer
  • The Society of Automotive Engineers has established an accepted numerical scale to measure the viscosity of motor oil. For examp
    12·2 answers
  • Malik analyzed three samples to test which element was a metalloid. The table shows his results. A 7-column table with 3 rows. T
    14·2 answers
  • What does the Coriolis effect describe
    12·1 answer
  • A gas occupies 5.31 liters at a pressure of 0.55 atm. Determine the volume at standard pressure.
    9·1 answer
  • The maximum speed limit on a highway is 55 miles per hour. What is that speed in meters per second? (mi = 1.609 km)
    10·1 answer
  • Choose which of the following are organic. (check all that apply) *
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!