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
galben [10]
2 years ago
6

3.

Chemistry
2 answers:
kherson [118]2 years ago
8 0

Answer: Alum is used in water treatment as a germicide

Explanation:

A. a germicide

3241004551 [841]2 years ago
6 0
Definitely A I did this in yr 8
You might be interested in
Where did coper find​
ladessa [460]

Answer:

Copper is element number 29

4th row

11th column

6 0
2 years ago
Calculate the value of the equilibrium constant, Kc , for the equilibrium shown below, if 0.124 moles of NO, 0.0240 mole of H2,
sdas [7]

the reaction is

2NO(g) + 2H2(g) <—> N2(g) + 2H2O (g)

Kc = [N2] [ H2O]^2 / [NO]^2 [ H2]^2

Given

moles of NO = 0.124 therefore [NO] = moles /volume = 0.124 /2 = 0.062

moles of H2 = 0.0240 , therefore [H2] = moles / volume = 0.0240 / 2 = 0.012

moles of N2 = 0.0380 , therefore [N2] = moles / volume = 0.0380 / 2 = 0.019

moles of H2O  = 0.0276 , therefore [H2O] = moles / volume = 0.0276 / 2 = 0.0138

Kc = (0.019) ( 0.0138)^2 / (0.062)^2 ( 0.012)^2 = 6.54



4 0
2 years ago
An Expert, please answer this question!
Rudiy27

Answer:

C) The student and desk have to be in contact to apply the force.

Explanation:

I am pretty sure :)

3 0
2 years ago
Read 2 more answers
Pls help this my final 20 points!!!! Be right
Anastaziya [24]

Answer:

I think it's B

Explanation:

I hope it helps

5 0
2 years ago
How much energy is required to melt a 500. gram block of iron? The heat of vaporization is 6090 J/g and the heat of fusion is 24
galben [10]

The mass of iron block is 500 g. The amount of energy required to melt the iron block needs to be calculated. Melting means conversion of solid to liquid thus, heat of fusion is used which is 247 J/g.

From heat of fusion, 247 J of energy is released by melting 1 g of iron block. Thus, the amount of heat released by melting 500 g of iron rod will be:

H= 247 J/g× 500 g=1.23×10^{5}

Hence, option B is correct.

3 0
3 years ago
Read 2 more answers
Other questions:
  • In Thomson's plum pudding model the mass of the atom is in the A.electrons. B.matter between the electrons. C.nucleus. D.proton
    15·2 answers
  • Which solute will result in a molecular solution?
    8·1 answer
  • What is the chemical name of the compound represented by the formula Ni2O3?
    7·2 answers
  • Select all that apply.
    5·2 answers
  • In a polar covalent bond,
    14·2 answers
  • Please help me!! PLEASE
    11·1 answer
  • What block does sodium belong to? s-block p-block d-block or f-block
    9·2 answers
  • hi, help me please with both number 4 and 5, please be sure of your answer, first to answer gets brainliest!​
    5·1 answer
  • What causes waves to occur?
    9·1 answer
  • Which of the following is not a cation?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!