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
Leni [432]
3 years ago
10

What is past form of be​

Chemistry
2 answers:
Vsevolod [243]3 years ago
5 0
There technically isn’t one. “Were” would be closest
Eduardwww [97]3 years ago
5 0

Answer:

was or were

Explanation:

self explainitory

You might be interested in
a student prepares a dilute solution of sodium hydroxidem, NaOH (aq), starting with 6 M sodium hydroxide. She then titrates a 1.
Serjik [45]

Answer:

M = 0.3077 M

Explanation:

As I said in the comments, you are missing the required volume of the base to react with the KHP. I found this on another site, and the volume it used was 21.84 mL.

Now, KHP is a compound often used to standarize NaOH or KOH solutions. This is because it contains a mole ratio of 1:1 with the base, so it's pretty easy to use and standarize any base.

Now, as we are using an acid base titration, the general expression to use when a acid base titration reach the equivalence point would be:

n₁ = n₂   (1)

This, of course, if the mole ratio is 1:1. In the case of KHP and NaOH it is.

Now, we also know that moles can be expressed like this:

n = M * V   (2)

And according to this, we are given the volume of base and the required mass of KHP. So, if we want to know the concentration of the base, we need to get the moles of the KHP, because in the equivalence point, these moles are the same moles of base.

The reported molar mass of KHP is 204.22 g/mol, so the moles are:

n = 1.372 / 204.22 = 6.72x10⁻³ moles

Now, we will use expression (2) to get the concentration of the diluted base:

n = M * V

M = n / V

M = 6.72x10⁻³ / 0.02184

M NaOH = 0.3077 M

This is the concentration of the dilute solution of NaOH

3 0
3 years ago
Wat is diffrent from a square and trapisode
Vikki [24]
The main difference between a square and a trapezoid is that a square has two pairs of parallel sides, while a trapezoid only has one
4 0
3 years ago
When two ionic compounds are dissolved in water, a double replacement reaction can... Group of answer choices occur if two of th
sergey [27]

Answer:

occur if two of the ions form an insoluble ionic compound, which precipitates out of solution

Explanation:

When two ionic compounds are dissolved in water, a double replacement reaction takes place if two of the ions form an insoluble ionic compound, which precipitates out of solution. In double displacement reaction ions switch partners. And hence, produce an insoluble precipitate.

5 0
3 years ago
Which of the following statements statements expresses the following chemical equation with words?
nadezda [96]

Answer:What are the two half reactions that show how many electrons are gained or lost by each species in the reaction:

Ni2+(aq) + Mg(s) → Ni(s) + Mg2+(aq)?

atoms cannot be created or destroyed in a chemical reaction

7 0
2 years ago
The kidneys perform several important functions in the human body. One of these is to regulate the amount of water that makes up
givi [52]

Answer:

c)the amount of urine will decrease

7 0
3 years ago
Read 2 more answers
Other questions:
  • How many moles of water are created if 3 moles of hydrogen react completely with excess oxygen?
    10·1 answer
  • Molly just started a new job. She needs to fill out a _____ so that her employer knows how much tax to take out. 1099 form tax r
    12·1 answer
  • Could use some help on this one
    9·1 answer
  • When you balance a chemical reaction, you are making sure that the law of conservation of matter is obeyed?
    7·2 answers
  • What is the oxidation half-reaction for 2Mg + O2 + 2Mgo?
    14·1 answer
  • How many bonds can nitrogen have
    6·1 answer
  • Write a balanced half-reaction for the oxidation of gaseous nitric oxide NO to nitrate ion NO−3 in acidic aqueous solution. Be s
    11·1 answer
  • ........PLEASE HELP........
    11·1 answer
  • Here is a pic of me I'm ugly i dont have all my pics of me anymore lost it all
    6·2 answers
  • Lead has an atomic number of 82. Which statement describes all neutral atoms and ions of lead?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!