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
salantis [7]
3 years ago
10

Carl adds a 6.70-gram cube of ice at 0.0°C to cool a glass of juice, As the ice melts, the temperature of the newly melted water

rises to 25.4°C. Water’s heat of fusion is 334 joules/gram, and its specific heat is 4.186 joules/gram degree Celsius. How many joules of energy did the ice cube gain?
Chemistry
1 answer:
raketka [301]3 years ago
7 0

Answer:

2,950

joules.

Explanation:

The units don’t need conversion, and the formula doesn’t need changing.

First, determine the energy required to melt the ice:

Q = mHf

Q = 6.70 g × 334

Q = 2,240 J

Next, determine the energy needed to raise the temperature of the newly melted water:

Q = mCΔT

Q = 6.70 g × 4.186 × (25.4°C – 0.0°C)

Q = 712 J

Now, add the energy values. Express the answer to 3 significant figures:

2,240 J + 712 J = 2,950 J.

You might be interested in
lead is a toxic metal that affects the central nervous system. a pbpb-contaminated water sample contains 0.0013 %pb%pb by mass.
Rus_ich [418]

0.0013% = 0.0013 g/100 ml water, or 1.3 mg/100 ml water

so for 145 mg, you need 145×100/1.3 = 11154 ml water or 11.154 L of water. Lead is a toxic metal that affects the central nervous system.

Extensively talking, the frightened gadget is organized into  essential parts, the central nervous system(CNS) and the peripheral nervous system (PNS). The CNS is the processing center of the frame and includes the mind and the spinal cord. Both of these are protected through 3 layers of membranes referred to as meninges.

The principal anxious gadget is the frame's processing center. The brain controls most of the capabilities of the frame, inclusive of cognizance, movement, thinking, speech, and the five senses of seeing, listening to, feeling, tasting and smelling. The spinal twine is an extension of the mind.

The brain is what controls all the frame's features. The spinal twine runs from the brain down via the again. It carries threadlike nerves that department out to each organ and frame part. This network of nerves relays messages from side to side from the mind to distinctive parts of the body.

Learn more about central nervous system here:- brainly.com/question/2114466

#SPJ4

7 0
2 years ago
1. How many ATOMS of boron are present in 2.20 moles of boron trifluoride ? atoms of boron.
maks197457 [2]

Answer:

1. How many ATOMS of boron are present in 2.20 moles of boron trifluoride? atoms of boron.

2. How many MOLES of fluorine are present in  of boron trifluoride? moles of fluorine.​

Explanation:

The molecular formula of boron trifluoride is BF_3.

So, one mole of boron trifluoride has one mole of boron atoms.

1. The number of boron atoms in 2.20 moles of boron trifluoride is 2.20 moles.

The number of atoms in 2.20 moles of boron is:

One mole of boron has ---- 6.023x10^2^3 atoms.

Then, 2.20 moles of boron has

-=2.20 mol. x 6.023 x 10^2^3 atoms /1 mol\\=13.25x10^2^3 atoms

2. Calculate the number of moles of BF3 in 5.35*1022 molecules.

(5.35x10^2^2 molecules/6.023x10^2^3)x 1mol\\=0.0888mol

One mole of boron trifluoride has three moles of fluorine atoms.

Hence, 0.0888moles of BF3 has 3x0.0888mol of fluorine atoms.

=0.266mol of fluorine atoms.

5 0
2 years ago
What are the 4 variables that describe a gas
Phantasy [73]
Pressure, volume, temperature, # moles Pressure, volume and temperature, and moles of gas


Hope that helps!!!!
8 0
3 years ago
A standard 10.00 g mass is weighed on an analytical balance 100 times. The average and standard deviation obtained gives 10.12 ±
Mekhanik [1.2K]

Answer:

There was an improvement in accuracy. There was no change in precision.

Explanation:

<em>The average mass after recalibration is closer to the mass of the standard, </em>so the recalibration improved the accuracy<em> </em>(the measurement is closer to an accepted 'true' value).

The standard deviation did not change, so the precision (or how disperse the measurements are) was not affected.

5 0
3 years ago
Electromagnetic waves heat earths surface through convection?
larisa86 [58]
Heat moves in three ways:Radiation, conduction, and convection. Radiation happens when heat moves as energy waves, call infrared waves,directly from its source to something else.This is how the heat from the Sun gets to Earth.In fact,all hot things radiate heat to cooler things:).hope this helps
4 0
3 years ago
Other questions:
  • Adelyn cut herself on broken glass in the classroom she started bleeding and needed assistance from her teacher which should the
    9·2 answers
  • Which monkey fell of the bed
    6·2 answers
  • A car is traveling at 20 minutes/second and is brought to rest by applying brakes over a period of 4 seconds.What is it average
    6·1 answer
  • What is the molecular geometry of the left carbon atom (circled) in acetic acid? The left carbon atom is attached to three hydro
    11·1 answer
  • A biochemist conducted an experiment to follow the movement of glucose molecules in animal cells. Glucose with radioactively lab
    11·1 answer
  • What is the value of k for this aqueous reaction at 298 k?
    15·1 answer
  • A chemist found a 60.00 gram sample containing copper and oxygen. Given the following percent composition, what is the mass of c
    5·1 answer
  • Do the following ! I'LL MARK THE BRAINLEST!<br> ITS SCIENCE!
    6·1 answer
  • An isotope of an element whose number of protons and neutrons place it on the edge of the Island of Stability is most likely
    7·1 answer
  • Key Concepts
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!