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
Aneli [31]
2 years ago
5

My teacher sucks at her job she literally got this off the internet anyways I need help with all of this...anyone‍♀️

Chemistry
2 answers:
Orlov [11]2 years ago
6 0
3. 2K, 1 Cl2, 2KCl hope it helped a little
Nina [5.8K]2 years ago
3 0

Answer:

internet bad

Explanation:

You might be interested in
The most common compound on earht is:
OlgaM077 [116]
The most common compound on earth is cellulose because it has enough energy to be the next source for biofuels. 
6 0
3 years ago
Which structural feature will differ among an ester, an alcohol, and an aldehyde, regardless of which examples are being compare
AlekseyPX

Answer:

The functional group

Explanation:

A functional group defines a hydrocarbon. an ester the functional group is an O- alkyl group while that one of an alcohol is -OH group. An aldehyde is a functional group on its own.

7 0
3 years ago
Read 2 more answers
Which is the next logical step in balancing the given equation? 3CO(g) + Fe2O3(s) Fe(s) + 3CO2(g)
Elena-2011 [213]

I believe that the answer is A.

5 0
2 years ago
Read 2 more answers
How many grams of Ar are there in 2.25 moles of Ar?
nydimaria [60]

Answer:

89.88 g

Explanation:

Atomic Mass of Ar: 39.948

Mass = moles * AM

Replacing moles = 2.25 and AM = 39.948 you get the mass of Ar:

Mass = 2.25 * 39.948

Mass = 89.88 g

8 0
2 years ago
A 25.0 ml sample of 0.723 m hclo4 is titrated with a 0.27303 m koh solution. the h3o+ concentration after the addition of 66.2 m
tia_tia [17]
This doesn't need an ICE chart. Both will fully dissociate in water.

Assume HClO4 and KOH reacts with one another. All you need to do is determine how much HClO4 will remain after the reaction. Calculate pH.

Step 1:

write out balanced equation for the reaction

HClO4+KOH ⇔ KClO4 + H2O

the ratio of HClO4 to KOH is going to be 1:1. Each mole of KOH we add will fully react with 1 mole of HClO4

Step 2:

Determining the number of moles present in HClO4 and KOH

Use the molar concentration and the volume for each:
25 mL of 0.723 M HClO4

Covert volume from mL into L:
25 mL * 1L/1000mL = 0.025 L

Remember:

M = moles/L so we have 0.025 L of 0.723 moles/L HClO4

Multiply the volume in L by the molar concentration to get:

0.025L x 0.723mol/L = 0.0181 moles HClO4.

Add 66.2 mL KOH with conc.=0.273M
66.2mL*1L/1000mL = .0662 L
.0662L x 0.273mol/L = 0.0181 moles KOH

Step 3:

Determine how much HClO4 remains after reacting with the KOH.

Since both reactants fully dissociate and are used in a 1:1 ratio, we just subtract the number of moles of KOH from the number of moles of HClO4:

moles HClO4 = 0.0181; moles KOH = 0.0181, so 0.0181-0.0181 = 0

This means all of the HClO4 is used up in the reaction.

If all of the acid is fully reacted with the base, the pH will be neutral = 7.

Determine the H3O+ concentration:

pH = -log[H3O+]; [H3O+] = 10-pH = 10-7

The correct answer is 1.0x10-7.
3 0
3 years ago
Read 2 more answers
Other questions:
  • Is the entropy change favorable or not, when a nonpolar molecule is transferred from water to a nonpolar solvent?
    8·1 answer
  • The founder of Islam was _____. Abbas ibn Abd al-Muttalib Muhammad Abu Bakr Khosrau
    12·2 answers
  • How can you be sure a solid is pure?
    10·1 answer
  • A 500.0-mL buffer solution is 0.100 M in HNO2 and 0.150 M in KNO2. Determine whether each addition would exceed the capacity of
    8·1 answer
  • The particles ejected in volcanic eruption are called
    12·1 answer
  • Expressed to the correct number of significant figures, what is the correct sum of (3.04g + 4.134g + 6.1g)?
    12·1 answer
  • Temperature rise in °C
    9·1 answer
  • What elements are highlighted:<br> a. Nonmetals<br> b. Metals<br> C. Metalloids
    10·1 answer
  • Cesium-137 is part of the nuclear waste produced by uranium-235 fission. The half-life of cesium-137 is 30.2 years. How much tim
    15·1 answer
  • 50.0 g of nitrogen gas (N2 ) are kept under pressure in a 3.00 L container. If the pressure is kept constant, how many moles of
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!