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
NeTakaya
4 years ago
7

How much heat is needed to raise the temperature of water with mass of 27.0 g at 20.0°C to 45.0°C?

Chemistry
1 answer:
ohaa [14]4 years ago
7 0

Answer:

2835 J

Explanation:

Take the specific heat capacity of water as 4.2 J/ g°C.

Energy (heat) = mass x specific heat capacity x change in temperature

(E= mcΔT)

E = 27 x 4.2 x (45-20)

E = 2835 J

You might be interested in
1#
Black_prince [1.1K]

Answer:

1= Magnesium

2 = Option 3 =  1s² 2s² 2p⁶

Explanation:

An electrically neutral atom consist of equal number of protons and electrons.

The answer for 1st q is magnesium because the electronic configuration showed twelve number of electrons. The atomic number of magnesium is twelve that's why this configuration is of Mg.

Mg₁₂ =  1s² 2s² 2p⁶ 3s²

The second answer is option three because has atomic number ten and third electronic configuration have ten electrons.

Ne₁₀ = 1s² 2s² 2p⁶

It is stable electronic configuration. Neon is inert because of this electronic configuration. The outer most shell is completely filled.

8 0
3 years ago
Please help, thanks!
Anastasy [175]
You need to use the formula--> P1V1= P2V2 (Boyles's law)

P1= 14 bar
V1= 312 mL
P2= ?
V2= 652 mL

now we plug the values into the formula.

(14 x 312) = (P2x 652)

P2= (14 x 312)/ 652= <span>6.70 bar</span>
5 0
3 years ago
Which of the following is NOT a way that reducing biodiversity directly impacts humans?
Zepler [3.9K]

C. Fewer habitats for wild animals to live in

Explanation:

Biodiversity does not directly impact humans in that there are fewer habitats for wild animals to live in. This is a direct impact on animals and not humans.

Biodiversity is the variation of life forms in an area. It is measured by the ability of the ecosystem to sustain different life forms and keep their interaction with the environment.

It helps to maintain and sustain life.

To humans, reducing biodiversity;

  • reduces the potential of medicine derived from other organisms. When their habitat is lost, we lose them.
  • fewer ecosystems to appreciate for beauty and recreation. It leads to loss of the ecosystem.
  • fewer wild food species for humans to eat.

Loss of habitat directly affects wild animals and not man.

learn more:

Biodiversity hotspots brainly.com/question/10723602

#learnwithBrainly

3 0
3 years ago
Explain the need of the term avarage atomic mass
vodomira [7]

Answer:

The average atomic mass of an element is the sum of the masses of its isotopes, each multiplied by its natural abundance (the decimal associated with percent of atoms of that element that are of a given isotopе). An element does not have an absolute atomic mass.

<em>Hope</em><em> this</em><em> </em><em>helps</em><em> </em><em>:</em><em>)</em>

4 0
3 years ago
Chocolate Chip Cookie Recipe: 1 cup of flour 100 chocolate chips 1 cup sugar 1/2 cup milk Yields 10 cookies You and your sister
igor_vitrenko [27]
The limiting reactant is the chocolate chips (they would run out first) because you can only make 3 batches with 300 chips.
4 0
4 years ago
Other questions:
  • Explain why very small cloud droplets of pure water evaporate even when the relative humidity is 100 percent.
    13·1 answer
  • For the reaction CH4 + 2O2 = CO2 + 2H2O, how many moles of water are produced from the combustion of 12.5 moles of methane?
    5·2 answers
  • A/an _______ is a type of research that involves observation and collecting data but does not include a control. A. independent
    7·1 answer
  • An 8.5g Ice Cube is placed into 255g water.
    15·2 answers
  • Select the correct answer.
    14·1 answer
  • A scuba diver 25.0m below the sea surface inhales 75.0mL of compressed air in a scuba tank at a pressure of 3.50atm and a temper
    12·1 answer
  • If you visited a virtual Newton’s Cradle website or played with the real device, you might have noticed that after a few swings,
    10·1 answer
  • Briefly explain why the bulk temperature of the water remains low (at room temperature)
    10·1 answer
  • A technician measures the weight of a reagent . The weight is 3269 g. What is the weight in kilograms ? Write your answer as a d
    5·1 answer
  • Why do you think nonmetals are used as insulators in thermos bottles?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!