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
seropon [69]
2 years ago
9

44.90 g of reactants are placed in a beaker

Chemistry
1 answer:
sergiy2304 [10]2 years ago
7 0

Answer:

D. -1882J

Explanation:

We can solve the energy released in a chemical reaction in an aqueous medium using the equation:

Q = -m*C*ΔT

<em>Where Q is energy (In J),</em>

<em>m is mass of water (45.00g)</em>

<em>C is specific heat of water (4.184J/g°C)</em>

<em>And ΔT is change in temperature (25.00°C - 15.00°C = 10.00°C)</em>

<em />

Replacing:

Q = -45.00*4.184J/g°C*10.00°C

Q = -1882J

Right answer is:

<h3>D. -1882J</h3>

<em />

You might be interested in
"How does land change temperature compared to water?"
bogdanovich [222]
It’s A. Land heats up and cools quickly then water
3 0
2 years ago
Why is it better to measure the percent change in mass<br> ratherthan just using the change in mass?
never [62]

Answer: The result is presented in proportion which gives a clearer understanding and accurate result.

Explanation: Percentage change in mass is the proportion of the initial mass of a substance changed after sometime. The results is presented as a percentage making it more accurate and can help to give future reference to weight calculations.

Change is Mass is the mass of a substance left after sometime mostly given in grams. It is not as accurate as percentage change in mass. It is generally better to show results in percentage change in mass as it gives a better understanding of what mass of a substance was lost after a given period or after application of energy like Heat or increased temperature.

6 0
2 years ago
Help anyone? :) please
Elanso [62]

Answer:

6. protons, mass number from the atomic number

7. Li= ,

8 0
2 years ago
Is solubility a physical change? Defend your answer.
fredd [130]

Answer:

yes

Explanation:

Solubility is an observation and no chemical reaction takes place. The composition of the compound/element is not changed.

- Hope that helped! Please let me know if you need further explanation.

3 0
3 years ago
Read 2 more answers
What is responsible for moving the water to the ground?
Mandarinka [93]

Answer:

Water applied to the surface of a relatively dry soil infiltrates quickly due to the affinity of the soil particles for water. As time passes and the soil becomes wet, the force of gravity becomes the dominant force causing water to move.

Explanation:

6 0
2 years ago
Read 2 more answers
Other questions:
  • Which term describes this reaction? addition condensation elimination substitution
    8·1 answer
  • When ethyl acetoacetate (CH3COCH2CO2CH2CH3) is treated with one equivalent of CH3MgBr, a gas is evolved from the reaction mixtur
    8·1 answer
  • What is the mass of cyclohexane solvent, in kg, if 9.76 mL are used and the cyclohexane has a density of 0.779 g/mL?
    11·1 answer
  • In baking biscuits and other quick breads, the
    7·2 answers
  • Help , thank you !!
    9·1 answer
  • Photosynthesis makes (__________) and (____________) for an ecosystem.
    12·1 answer
  • These steps are followed when using the half-life of carbon-14 to determine
    15·2 answers
  • Methane is called an organic compound why​
    5·2 answers
  • Which of these is NOT a science and engineering practice?
    11·1 answer
  • Ground-state ionization energies of some one-electron species are
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!