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
Kaylis [27]
2 years ago
14

can someone please help me with this question, it's for my lab report. I tried my best but failed to do the calculation. please

it's an emergency, just do the best you can, even if you're not 100% sure with your answer, atleast it will give me an idea also where to start. Thank you

Chemistry
1 answer:
Dahasolnce [82]2 years ago
3 0

YOU BETTER MARK ME BRAINLIEST if someone else answers!!!!

When the two substances are mixed, we see an increase in the temperature,

The flat horizontal line at the beginning of the graph tells us the initial temperature of mixing the two substance.

The initial temperature of mixing is ≈22.5 oC

and, final temperature would be the next flat horizontal line ≈32.5 oC from the given graph

You might be interested in
A standard soft drink can has a volume of 0.355 L. An empty can is sealed while
beks73 [17]

Answer:

0.35 atm

Explanation:

To solve this problem, we use Boyle's Law: P_1V_1=P_2V_2 , where P is the pressure and V is the volume.

Here, V_1 = 0.355 L, P_1 = 1.0 atm, and V_2 = 0.125 L. So, just plug these values into the equation:

(1.0) * (0.355) = P_2 * (0.125)  ⇒  P_2 ≈ 0.35 atm

Thus, the pressure is 0.35 atm.

Hope this helps!

8 0
3 years ago
In the reaction of aluminum metal and oxygen to make aluminum oxide, how many grams of oxygen gas will react with 2.2 moles alum
sweet-ann [11.9K]

Answer:

52.8 g of O2.

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

4Al + 3O2 —> 2Al2O3

From the balanced equation above,

4 moles of Al reacted with 3 moles of O2 to produce 2 moles of Al2O3

Next, we shall determine the number of mole of O2 needed to react with 2.2 moles of Al. This can be obtained as follow:

From the balanced equation above,

4 moles of Al reacted with 3 moles of O2.

Therefore, 2.2 moles of Al will react with = (2.2 × 3)/4 = 1.65 moles of O2.

Thus, 1.65 moles of O2 is needed for the reaction.

Finally, we shall determine the mass of O2 needed as shown below:

Mole of O2 = 1.65 moles

Molar mass of O2 = 2 × 16= 32 g/mol

Mass of O2 =?

Mole = mass/Molar mass

1.65 = mass of O2 /32

Cross multiply

Mass of O2 = 1.65 × 32

Mass of O2 = 52.8 g

Therefore, 52.8 g of O2 is needed for the reaction.

4 0
3 years ago
The volume of a gas is 550 mL at 960 mm Hg and 200.0 C. What volume
Masja [62]

Answer:

The volume will be 568.89 mL.

Explanation:

Boyle's law says that "The volume occupied by a given gaseous mass at constant temperature is inversely proportional to pressure"

Boyle's law is expressed mathematically as:

Pressure * Volume = constant

or P * V = k

Gay-Lussac's law indicates that when there is a constant volume, as the temperature increases, the pressure of the gas increases. And when the temperature is decreased, the pressure of the gas decreases. That is, the pressure of the gas is directly proportional to its temperature. Gay-Lussac's law can be expressed mathematically as follows:

\frac{P}{T}=k

Where P = pressure, T = temperature, K = Constant

Finally, Charles's law indicates that as the temperature increases, the volume of the gas increases and as the temperature decreases, the volume of the gas decreases. In summary, Charles's law is a law that says that when the amount of gas and pressure are kept constant, the quotient that exists between the volume and the temperature will always have the same value:

\frac{V}{T}=k

Combined law equation is the combination of three gas laws called Boyle's, Charlie's and Gay-Lusac's law:

\frac{P*V}{T} =k

Studying an initial state 1 and a final state 2, it is fulfilled:

\frac{P1*V1}{T1} =\frac{P2*V2}{T2}

In this case:

  • P1= 960 mmHg
  • V1= 550 mL
  • T1= 200 C= 473 K (being 0 C=273 K)
  • P2= 830 mmHg
  • V2= ?
  • T2= 150 C= 423 K

Replacing:

\frac{960 mmHg*550 mL}{473K} =\frac{830 mmHg*V2}{423 K}

Solving:

V2=\frac{423 K}{830 mmHg} *\frac{960 mmHg*550 mL}{473K}

V2= 568.9 mL

<u><em>The volume will be 568.89 mL.</em></u>

4 0
3 years ago
Which of the following interparticle forces is the weakest
GuDViN [60]

Answer:a

Explanation:sense

6 0
2 years ago
Read 2 more answers
Write the equilibrium expression showing the dissociation of Ca(OH)2 in water. (Omit states-of-matter from your answer. )
Monica [59]

Answer:

Ca(OH)2 --> Ca2+ + 2OH-

Explanation:

Calcium hydroxide is sparingly soluble in water. It dissociates to give the following:

The net ionic equation :

Ca(OH)2 + H2O --> Ca2+ + 2OH- + H2O

Since, H2O doesn't affect the overall reaction, therefore;

Ca(OH)2 --> Ca2+ + 2OH

7 0
3 years ago
Other questions:
  • How many grams are there in 7.4 x 1023 molecules of H2SO4?
    11·1 answer
  • Calculate the mass of aluminum that would have the same number of atoms as 6.35 g of cadmium ​
    5·1 answer
  • You prepare a 2nd solution (solution B) by pipetting 10.00 ml of your 1st solution (solution A) into a 50.00 ml volumetric flask
    12·1 answer
  • Calculate the number of atoms in 0.316 mol of phosphorus
    14·1 answer
  • Alleles are represented using upper and lowercase letters like B for brown eyes and b for blue eyes.
    10·2 answers
  • Please help me, i don’t understand :(
    10·2 answers
  • When an object accelerates, what about the motion changes
    13·1 answer
  • The concentration of citric acid (H3C6H5O7) in citric fruits ranges from 0.005 M to 0.30 M. Consider a 80.1 mL sample of pure li
    6·1 answer
  • Which is an<br> example of a renewable energy resource?
    14·2 answers
  • Which layer is thin, brittle, solid, and composed primarily of silica?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!