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
gizmo_the_mogwai [7]
3 years ago
12

A student is trying to calculate the density of a ball. She already knows the mass, but she needs to determine the volume as wel

l. Which of the following formulas can be used to calculate the volume of the ball?
Group of answer choices

V equals four-thirds times pi times r cubed

V equals one-third times pi times r squared times h

V = s3

V = πr2h
Chemistry
1 answer:
murzikaleks [220]3 years ago
7 0

Answer:

V equals four-thirds times pi times r cubed

Explanation:

Volume = a³ , where a is length of each side. Volume = l × w × h , where l is length, w is width and h is height. Volume = 4/3 πr³ , where r is the radius. Volume = πr²h , where r is the radius and h is the height.

You might be interested in
Physical Science Structures and Properties of Matter Portfolio
daser333 [38]

Answer:

true

Explanation:

8 0
3 years ago
A 25.0-mL sample of 0.150 M hydrocyanic acid is titrated with a 0.150 M NaOH solution. The Ka of hydrocyanic acid is 4.9 × 10-10
lara [203]

Answer:

The pOH = 1.83

Explanation:

Step 1: Data given

volume of the sample = 25.0 mL

Molarity of hydrocyanic acid = 0.150 M

Molarity of NaOH = 0.150 M

Ka of hydrocyanic acid = 4.9 * 10^-10

Step 2: The balanced equation

HCN + NaOH → NaCN + H2O

Step 3: Calculate the number of moles hydrocyanic acid (HCN)

Moles HCN = molarity * volume

Moles HCN = 0.150 M * 0.0250 L

Moles HCN = 0.00375 moles

Step 3: Calculate moles NaOH

Moles NaOH = 0.150 M * 0.0305 L

Moles NaOH = 0.004575 moles

Step 4: Calculate the limiting reactant

0.00375 moles HCN will react with 0.004575 moles NaOH

HCN is the limiting reactant. It will completely be reacted. There will react 0.00375 moles NaOH. There will remain 0.004575 - 0.00375 = 0.000825 moles NaOH

Step 5: Calculate molarity of NaOH

Molarity NaOH = moles NaOH / volume

Molarity NaOH = 0.000825 moles / 0.0555 L

Molarity NaOH = 0.0149 M

Step 6: Calculate pOH

pOH = -log [OH-]

pOH = -log (0.0149)

pOH = 1.83

The pOH = 1.83

6 0
4 years ago
Why is absolute zero
weeeeeb [17]
I think it is D
Hope this help you?
8 0
3 years ago
Read 2 more answers
What is the correct answer?
Ivahew [28]
C - bc as the water boils the cold water particles melt and become the hot water particles!
3 0
3 years ago
Read 2 more answers
A copper atom has 29 protons and 36 neutrons. What is the mass number of this atom in amu?​
Mamont248 [21]
The Mass number is 65, Copper-65

To find the mass number you add the number of protons to the number of neutrons.
4 0
2 years ago
Other questions:
  • Select all that are true regarding stereoisomers,constitutional isomers, and conformational isomers
    13·1 answer
  • Why there is not reaction in nac2h3o2(aq)+pb(no3)2(aq)→?
    5·1 answer
  • The pressure exerted on a 240 ml sample of hydrogen gas at constant temperature is increased from 325 mmhg to 550 mm hg, what wi
    9·1 answer
  • Which astronomer spent 20 years plotting the positions of the planets?
    13·1 answer
  • At constant volume, you cool a sealed, air-filled can, and the pressure reduces by half. What happens in this situation? The num
    6·1 answer
  • 1. Determine if the following statements are true or false (each question is worth one point). The rate law for an overall react
    8·1 answer
  • Which of these is common to all chemical changes?
    12·1 answer
  • What is the balanced equation for the combustion of Ethanol C2H8O ???​​
    7·1 answer
  • PLEASE HELP ME ITS DUE IN 25 MINUTES True or false iron and nickel are less dense than silicates ?
    10·2 answers
  • Which of the "planetary health measures" shown here have humans already exceeded?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!