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
Marina86 [1]
3 years ago
14

What is significant about 42?​

Chemistry
1 answer:
maks197457 [2]3 years ago
5 0

Answer:

It’s twice as much as 9+10

Explanation:

You might be interested in
In animals, nitrogenous wastes are produced mostly from the catabolism of _____. In animals, nitrogenous wastes are produced mos
RoseWind [281]

Answer:

Proteins and nucleic acids

Explanation:

Nitrogen compounds in animals that are no longer of use, or are in access are excreted from the animals body, and are thus called nitrogenous waste. These nitrogenous waste can be excreted in three different ways.

1. Ammonia

2. Urea

3. Uric acid

8 0
3 years ago
A bond formed when atoms transfer elentron is a bond
lubasha [3.4K]
Ionic bonds involve a cation and an anion. The bond is formed when an atom, typically a metal, loses an electron or electrons, and becomes a positive ion, or cation. Another atom, typically a non-metal, is able to acquire the electron(s) to become a negative ion, or anion.

One example of an ionic bond is the formation of sodium fluoride, NaF, from a sodium atom and a fluorine atom. In this reaction, the sodium atom loses its single valence electron to the fluorine atom, which has just enough space to accept it. The ions produced are oppositely charged and are attracted to one another due to electrostatic forces.
5 0
3 years ago
How many molecules are there in a 1.43 mole sample of H2O2?
SIZIF [17.4K]
One mole of hydrogen peroxide contains 6.02 x 10^23 molecules of hydrogen peroxide. And each molecule contains 4 atoms, so the answer is 4 x 6.02 x 10^23.
5 0
3 years ago
Estimate the ph of the resulting solution prepared by mixing 1.0 mole of solid disodium phosphate (na2hpo4) and 1.25 mole of hyd
GenaCL600 [577]

The HCl added = 1.25 moles

and the moles of Na2HPO4 = 1 mole

Now when acid is added in the given solution of Na2HPO4

One mole of H+ will react with one mole of Na2HPO4 to given one mole of NaH2PO4

Na2HPO4  + H+  ---> NaH2PO4

Now this one mole formed NaH2PO4 will further react with 0.25 moles of H+ left to form 0.25 moles of  H3PO4 and 0.75 moles of NaH2PO4 will remain in the solution

So this will result into formation of a buffer of phosphoric acid and NaH2PO4

NaH2PO4  + H+  ---> H3PO4

pKa of H3PO4 = 2.1

so pH = pKa + log [salt] / [acid] = 2.1 + log [0.75 / 0.25] = 2.58

so the pH will be in between 2.1 to 7.2

7 0
3 years ago
If the H+ ion concentrati on in an aqueous solution is 0.0010 M, why is it not possible for the OH− ion concentration to be 1.0
spayn [35]

Answer:

im not sure sry

Explanation:

6 0
3 years ago
Other questions:
  • You are given a solution of hcooh (formic acid) with an approximate concentration of 0.20 m and you will titrate this with a 0.1
    14·2 answers
  • What mass of CaCO3 is required to react completely with 0.56 L of HCl?
    9·1 answer
  • ANSWER FAST PLZ 25 POINTS!!!!!!!!!!!!!!!
    14·1 answer
  • Earth has several ideal features which enable it to support life. MOST important is the
    6·2 answers
  • What is a solvent using your own words
    14·2 answers
  • What is the temperature of the liquid at vaporization (boiling/condensing)?
    8·1 answer
  • Consider the role of third world countries in this system. How would they benefit or not benefit from a cap and trade system?
    12·1 answer
  • Which of the following was not used as evidence to support
    12·1 answer
  • How many grams of potassium chloride is produced with 2.5g of pure potassium
    15·1 answer
  • Determine the concern traction in [M] of a solution that has an absorbance of 0.420
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!