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
Wittaler [7]
4 years ago
10

A hot cup of coffee (treat it like water) rests on a windowsill. If it cools off from 90 C

Chemistry
2 answers:
zavuch27 [327]4 years ago
6 0

Answer:

823.84~mL

Explanation:

We have to use the <u>heat equation</u> for this problem:

Q~=~m*Cp~*ΔT

Where:

Q=heat=103310 J

m = mass = <u>Unknow</u>

Cp=specific heat (of water)=4.18 \frac{J}{g^{\circ}C}

ΔT= 30 ºC

Now, we have to <u>solve for "m"</u>:

m=\frac{Q}{Cp*deltaT}=\frac{103310~J}{4.18\frac{J}{g^{\circ}C}*30^{\circ}C}=823.84~g

Finally, we have to <u>convert</u> from grams to mL using the <u>density</u> value 1~\frac{g}{mL}.

823.84~g~\frac{1~mL}{1~g}=823.84~mL

kakasveta [241]4 years ago
5 0

Answer:

1721.8ml

Explanation:

90-30=60

103,310÷60=1721.83333333

1721.83333333= 1721.8

You might be interested in
A sample of pure NH4HS is placed in a sealed 2.0-L container and heated to 550 K at which the equilibrium constant is 3.5 x 10-3
Zolol [24]

Answer:

The mass of NH_{3} in the container is 2.074 gram

Explanation:

Given:

Volume of NH_{4} HS    V = 2 lit

Equilibrium constant k _{eq} = 3.5 \times 10^{-3}

The reaction in which NH_{3} is produced

  NH_{4} HS ⇄ NH_{3} + H_{2}S

Here equal moles of NH_{3} and H_{2}S is formed.

From the formula of equilibrium constant,

  k_{eq} = (NH_{3})(H_{2}S )

   x^{2} = 3.5 \times 10^{-3}

     x = 0.061 M

Above value shows,

   NH_{3} = 0.061 \frac{moles}{L}

So in 2 L no. moles of NH_{3} = 0.061 \times 2 = 0.122 moles.

So mass of 0.122 mole of NH_{3} is = 0.122 \times 17 = 2.074 g

Therefore, the mass of NH_{3} in the container is 2.074 gram

8 0
3 years ago
Which mixture is most likely to form a suspension?flour and liquid water, as in gravy metal coins and liquid water sodium chlori
azamat
<span>The mixture that is most likely to form a suspension is flour and liquid water mixed together, as in a mixture like gravy. A suspension mixture is a mixture that has large solid particles, particles that are large enough for sedimentation.</span>
4 0
3 years ago
When is work considered to be work?<br> (this is about force,work and energy)
n200080 [17]

Answer:

In summary, work is done when a force acts upon an object to cause a displacement. Three quantities must be known in order to calculate the amount of work. Those three quantities are force, displacement and the angle between the force and the displacement.

8 0
2 years ago
What is the value for (delta)G at 1000 K if (delta)H = -220 kJ/mol and (delta)S = -0.05 kJ/(molK)?
tankabanditka [31]
The system is isothermal, so we use the formula:
(delta)G = (delta)H - T (delta) S

Plugging in the given values:
(delta)G = -220 kJ/ mol - (1000K) (-0.05 kJ/mol K)
(delta)G = -170 kJ/mol

If we take a basis of 1 mol, the answer is
D. -170 kJ 
6 0
3 years ago
Read 2 more answers
The isotope carbon-14 has 6 protons and an atomic mass of 14. Carbon-14 has:
Aleks [24]
Carbon has 7 neutrons

Hope this helps
5 0
3 years ago
Read 2 more answers
Other questions:
  • How are continental drift and plate tectonics related
    9·1 answer
  • While burning coal and charcoal, you notice that coal releases more heat than charcoal. That means that the... 1. elastic energy
    12·1 answer
  • If a molecule diffusing through extracellular fluid travels 1 mm in 1 sec, how long will it take that molecule to diffuse 1 cm?
    13·1 answer
  • Water is being lost from earth at the rate per a year of what percentage
    7·2 answers
  • HELP QUICKLY PLEASE!!! Thermal energy is transferred from a hot object to a colder object by means of ___
    9·1 answer
  • PLEASE HELP!!!!!!!!!!!!!
    14·1 answer
  • Why do girls like boys who act rude more than boys that are actually nice!
    10·2 answers
  • If a substance has a density of 1.345g / mL , how many grams would the substance weigh if the sample has a volume of 22.1 ml?
    15·1 answer
  • Air is classified as a mixture. What statement must be true about air? (4D)
    9·1 answer
  • Monosaccharides and disaccharides are what kind of molecules?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!