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
katovenus [111]
3 years ago
5

Trial 1: Heat 30.0 grams of water at 0 °C to a final temperature of 40.0 °C.

Chemistry
1 answer:
kap26 [50]3 years ago
3 0

Answer:

Explanation:

Using the formula below to calculate the heat absorbed in each trial:

Q = m × c × ∆T

Where;

Q = amount of heat absorbed (J)

m = mass of substance (g)

c = specific heat of water (4.184J/g°C)

∆T = change in temperature (°C)

Trial 1: Heat 30.0 grams of water at 0 °C to a final temperature of 40.0 °C.

Q = 30 × 4.184 × (40 - 0)

Q = 30 × 4.184 × 40

Q = 5,020.8J

Trial 2: Heat 40.0 grams of water at 10.0 °C to a final temperature of 40.0 °C.

You might be interested in
How many moles are in 7.1x10^21 atoms of iron?
Nitella [24]

Answer:

0.011 moles

Explanation:

There are about 6.02*10^23 atoms in a mole, so in the given sample, there are

\frac{7.01 \times  {10}^{21} }{6.02 \times  {10}^{23} }

which is about 0.011 moles.

8 0
3 years ago
Scientists made the following two observations about emission spectra: each element has a unique emission spectrum. atoms emit e
kondaur [170]
<span>In the Bohr model electrons in atoms can occupy allowed orbits where they do not emit energy. Exchange of energy with the surrounding environment occurs only when an electron "jumps" from an orbit to another. Hope this answers the question. Have a nice day.</span>
3 0
3 years ago
Read 2 more answers
If hydrofluoric acid is a stronger acid than acetic acid, which statement is most likely true?
Alchen [17]

Answer: The statement conjugate base of hydrofluoric acid is weaker than that of acetic acid is most likely true.

Explanation:

A strong acid upon dissociation gives a weak conjugate base. This can also be said as stronger is the acid, weaker will be its conjugate base or vice-versa.

Hydrofluoric acid is a strong base as it dissociates completely when dissolved in water.

For example, HF \rightleftharpoons H^{+} + F^{-}

The conjugate base is F^{-} which is a weak base.

Acetic acid is a weak acid as it dissociates partially when dissolved in water. So, the conjugate base of acetic acid is a strong base.

CH_{3}COOH \rightarrow CH_{3}COO^{-} + H^{+}

Thus, we can conclude that the statement conjugate base of hydrofluoric acid is weaker than that of acetic acid is most likely true.

4 0
3 years ago
When patterns of stars appear to move across the sky, it provides evidence that ________.
Alexus [3.1K]

Answer:

Answered B

Explanation:

The earth moves which makes the stars and everything in space seem like its moving

6 0
3 years ago
250 meters in 110 seconds what is the average speed in m/s
Dmitry [639]

Answer:

272 m/s

Explanation:

The boy jogs= 250 m

time he takes 110 seconds

average speed = 250/110

272 m/s

8 0
3 years ago
Other questions:
  • It takes 26.8 mL of a 0.0700 M NaOH standard solution to neutralize a 250 mL sample of lactic acid (C3H6O3). What mass of lactic
    12·1 answer
  • Determine the reagents needed and the synthetic intermediate that is formed in the conversion of the secondary alcohol into the
    9·1 answer
  • 1. What type of reaction is listed below? Prove that it is balanced by listing the number of elements on both side of the equati
    15·2 answers
  • The body's nervous system is made up of the brain,the spinal cord, the retina ,and many other nerves. The circulatory system is
    13·2 answers
  • Great amounts of atomic energy are released when a _______reaction occurs.
    11·1 answer
  • What is a membrane?
    5·1 answer
  • Help, please I don't understand what I have to do
    6·1 answer
  • Ok, I need helpies! .__.
    11·1 answer
  • Give reasons :
    15·2 answers
  • Exactly 0.2220 g of pure Na2CO3 was dissolved in 100.0 mL of 0.0731 M HCl. (a) What mass in grams of CO2 was evolved
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!