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
vlabodo [156]
3 years ago
12

An eccentric chemistry professor (not mentioning any names) stops in every day and orders 200ml of Sumatran coffee at precisely

75.0°C. You then need to add enough milk at 5.00°C to drop the temperature of the coffee, initially at 95.0°C, to the ordered temperature.
Chemistry
1 answer:
xz_007 [3.2K]3 years ago
8 0

Answer:

68.97g of milk must be added

Explanation:

To solve this problem we need to use the equation:

Q = C*m*ΔT -Coffee cup calorimeter equation-

This equation relates mass and change in temperature with heat of solution, Q.

The energy that decreases in the milk is the same that increases in the milk. That is:

Q(milk) = Q(tea)

Using the equation:

4.184J/molK* Mass milk * (65.0°C - 7.00°C) = 4.184J /molK * 200g (Tea) * (85.0°C - 65.0°C)

Mass milk * 58.0°C = 200g * 20.0°C

Mass milk = 4000g°C / 58.0°C

Mass milk =

68.97g of milk must be added

You might be interested in
Water in the atmosphere is a gas. When the air cools, water may condense into clouds. Then it may become a liquid or a solid and
Maksim231197 [3]

Answer:

A precipitation is answer

4 0
3 years ago
The symbol for a radioactive nuclide is Superscript 234 subscript 90 upper T h.. Which statement is correct?
Contact [7]

The correct statement : The atomic number of the radioactive nuclide is 90.

<h3>Further explanation</h3>

In the following element notation,

\large {{{A} \atop {Z}} \right X}

X = symbol of elemental atom

A = mass number

   = number of protons + number of neutrons

Z = atomic number

   = number of protons = number of electrons, on neutral elements

The symbol for a radioactive nuclide :

\tt ^{234}_{90}Th

atomic number  = 90

mass number  = 234

number of neutrons = 234-90=144

number of protons = atomic number = 90

4 0
3 years ago
Read 2 more answers
The primary source of chemical energy in the body is
scZoUnD [109]
ATP synthesis in human cells and energy metabolism.
6 0
3 years ago
Calculate the heat absorbed when 31.6 g of ice at 0°C is completely melted​
attashe74 [19]

Latent heat of fusion for ice is 33600J/k

  • Mass=31.6J/k

Heat absorbed

  • k_f×m
  • 31.6×33600
  • 1061,740mJ
  • 1061J
8 0
3 years ago
suppose that you are comparing several objects. is it correct to say that the object with the largest volume has the largest mas
Semmy [17]

Answer:

No

Explanation:

It is not correct to say that an object with the largest volume has the largest mass.

Mass and volume are not directly related. In fact, the relationship between them can be direct or inverse.

Mass is the amount of matter in a substance. Volume is the space a body occupies.

  • A balloon and a stone for example is a typical one.
  • A balloon has more volume but far lesser mass compared to a stone.
  • A stone, gravel sized has low volume but more massive than a balloon.

Therefore, it is wrong to say a balloon has more mass because it has more volume.

3 0
3 years ago
Other questions:
  • Rank the following groups in order of decreasing priority:A. bondCH3B. bondCH2CH3C. bondCH2CH2CH3D. bond(CH2)3CH3
    10·1 answer
  • 1. Use the collision theory of reaction rates to explain the relationship between the temperature and the rate of a chemical rea
    12·2 answers
  • A tank containing both HF and HBr gases developed a leak. The ratio of the rate of effusion of HF to the rate of effusion of HBr
    10·2 answers
  • A magician pulls a tabecloth out from under dishes and
    8·1 answer
  • What is the order of the events for the water cycle on a typical warm day?
    12·1 answer
  • 9. How long will it take 120 grams of Strontium-90 to decay to 7.5 grams?<br>with steps pls​
    11·1 answer
  • Characteristics of a substance that describe its' ability to change into a different substance are called?
    5·1 answer
  • Which statement correctly pairs the climate factor with its effect on temperature? *
    11·1 answer
  • A first-order reaction is 45% complete at the end of 43 minutes. What is the length of the half-life of this reaction
    15·1 answer
  • What is the equilibrium expression for the reaction below?<br> 2N₂(g) + O₂(g)<br> 2N₂O(g)
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!