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
Natasha_Volkova [10]
3 years ago
8

A group of people take a diet pill. After 3 months, they measure the amount of weight they lost.

Chemistry
2 answers:
iris [78.8K]3 years ago
8 0

dependent variable I think

Alex3 years ago
4 0
Dependent variable the person above is right too, I think
You might be interested in
The number of neutrons and protons in the nuclei of two atom A and B is as follow: [A] proton= 8 and neutron = 8, [B] proton = 8
sveticcg [70]
A.atomic mass(a)=16
atomic mass(b)=18
b.a and b are isotopes
c.(a)=2,6
(b)=2,6
4 0
3 years ago
Periodic table of elements
Sidana [21]

Vertical Column is a group

Horizontal is Period

Aliki earth metals is a group

Lithium- Neon is both

Based on electrons are both

Number of electron shells is both

5 0
3 years ago
A 100.0 mL solution containing 0.864 g of maleic acid (MW=116.072 g/mol) is titrated with 0.276 M KOH. Calculate the pH of the s
Lilit [14]

Answer:

pH = 1.32

Explanation:

                 H₂M + KOH ------------------------ HM⁻ + H₂O + K⁺

This problem involves a weak diprotic acid which we can solve by realizing they amount  to buffer solutions.  In the first  deprotonation if all the acid is not consumed we will have an equilibrium of a wak acid and its weak conjugate base. Lets see:

So first calculate the moles reacted and produced:

n H₂M = 0.864 g/mol x 1 mol/ 116.072 g  =  0.074 mol H₂M

54 mL x  1L / 1000 mL x 0. 0.276 moles/L = 0.015 mol KOH

it is clear that the maleic acid will not be completely consumed, hence treat it as an equilibrium problem of a buffer solution.

moles H₂M left = 0.074 - 0.015 = 0.059

moles HM⁻ produced = 0.015

Using the Henderson - Hasselbach equation to solve for pH:

ph = pKₐ + log ( HM⁻/ HA) = 1.92 + log ( 0.015 / 0.059) = 1.325

Notes: In the HH equation we used the moles of the species since the volume is the same and they will cancel out in the quotient.

For polyprotic acids the second or third deprotonation contribution to the pH when there is still unreacted acid ( Maleic in this case) unreacted.

           

3 0
3 years ago
PLEASE ANSWER!!!VERY IMPORTANT!!! I WILL RATE BRAINLIEST!!!!
k0ka [10]
Day and night is due to the earth rotating. Seasons are due to the earth rotating on a slightly tilted axis, causing light to be shone on different parts of the earth more directly during different parts of the year. Constellations changing throughout the night are because of the earth moving and rotating. Throughout the year, the earth moves, causing us to be facing different directions in different parts of the year. The North Star does't move because it is close to Earth's line of axis, and therefore does not appear to move.
6 0
3 years ago
Read 2 more answers
2 AICI3 + 3 Ca - 3 CaCl2 + 2 Al
Ivanshal [37]
50 grams of calcium
8 0
2 years ago
Other questions:
  • HELP WILL GIVE BRAINLIEST
    10·1 answer
  • Please somebody help I have no idea what the correct answer is! (iii) and (iv)
    8·1 answer
  • What can you infer about copper and silver based on their position relative to each other?
    7·1 answer
  • The data listed below are for mechanical waves. Which wave has the greatest energy? amplitude = 7 cm; wavelength = 12 cm; period
    14·2 answers
  • Sam places 5 g of baking soda in 5 g of liquid vinegar, and notices fizzing. After all the fizzing stops, 5 g of liquid remains.
    9·2 answers
  • What is the chemical formula of sodium azide?
    7·1 answer
  • Which of the following is an example of a conjugate acid-base pair?​
    9·2 answers
  • 1) Alarge doud of dust and gas spread out in a large area is
    7·1 answer
  • the sequence of stages an organisms go through from one generation to the next lace where an organism lives is called in​
    7·1 answer
  • Which statement best explains the purpose of using a mole in the measurement of matter? It is commonly used as another unit of m
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!