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
Katarina [22]
4 years ago
14

What is the oxidation number of boron in Na2B4O7

Chemistry
1 answer:
makkiz [27]4 years ago
7 0
The answer is 4. Hope it helps!
You might be interested in
What can you conclude from the hypothesis “If the temperature of the liquid is increased, then more sugar will dissolve because
sergeinik [125]
<h2>Answer with Explanation</h2>

This hypothesis concludes that the sugar dissolves faster in warm solution has to do with increased molecular motion because the combined power in the warm solution makes molecules in water to travel quicker and sucrose molecules to fluctuate faster which produced a continued evolution favors to make the connections between sucrose molecules easier to succeed. The collisions between the water molecules and the sugar molecules are at a high rate due to increased temperature.

4 0
3 years ago
When an atom gains a valence electron, it become a (n)_____ion.
Lilit [14]

An atom that gains electrons and becomes negatively charged is known as an <u>anion</u><u>.</u>

Hope it helps!

4 0
3 years ago
What is the ph of a solution with hydrogen ion concentration of 0.001m?
lys-0071 [83]
Find the pH using the concentration of hydrogen ions [H+] of 0.001M (molarity) by taking the negative log of the value:

-log[H+]=pH
-log[0.001] = pH
-log[1x10^-3]=pH
3=pH
6 0
3 years ago
Which region of the electromagnetic spectrum is used by doctors to view the skeletal structure of the human anatomy? A) X-Rays B
Alona [7]

The order of increasing wavelength (and decreasing energy) of the given radiations is:

Gamma Rays > X-Rays > Visible Light > Radio waves

X-rays due to the short wavelength and higher energies have the ability to penetrate through soft tissues like the skin or get absorbed by hard tissues like the bones. Thus, when the human anatomy is exposed to X-rays, bones appear white whereas the skin/tissues appear gray.

Ans: A)  X-rays are used by doctors to view skeletal structures

6 0
3 years ago
Read 2 more answers
There is 35 mg of sodium in a can of Coke. You determine it to be 28 mg. What is your percent error?
natali 33 [55]

Answer:

The answer is

<h2>20 %</h2>

Explanation:

The percentage error of a certain measurement can be found by using the formula

P(\%) =  \frac{error}{actual \:  \: number}  \times 100\% \\

From the question

actual volume = 35 mg

error = 35 - 28 = 7

The percentage error is

P(\%) =  \frac{7}{35}  \times 100 \\  =  \frac{1}{5}  \times 100 \\  =  20

We have the final answer as

<h3>20 %</h3>

Hope this helps you

8 0
3 years ago
Read 2 more answers
Other questions:
  • Gasohol is a fuel containing ethanol (c2h6o) that burns in oxygen (o2) to give carbon dioxide and water.
    12·1 answer
  • How does the structure of covalent bonds affects their structure.
    12·1 answer
  • In the chemical formula O2, what does the number 2 mean?
    7·1 answer
  • How many grams of water can be produced when 11.7 moles of ethane (C2H6) react with excess oxygen gas?
    13·2 answers
  • Given the speed of light as 3.0 × 108 m/s, calculate the wavelength of the electromagnetic
    13·1 answer
  • The Davis Mountains in West Texas were once taller than they are now. Which of the following forces most likely caused the mount
    8·1 answer
  • Based on the reactivities of the elements involved, which reaction will form products that are more stable than the reactants?
    6·1 answer
  • A] 1 N2 + 3 H2 → 2 NH3
    12·1 answer
  • Liquid wax becomes....... whenit becomes cooler
    14·2 answers
  • What is the amplitude of the above wave?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!