Any method of determining whether an event or object is older or younger than others
Answers
I believe its relative dating.
Related Questions
How many moles are in 98.3 grams of aluminum hydroxide, Al(OH)3?
Which of these observations are not explained by kinetic-molecular theory?
How do lungfish survie in intense heat
Which information about a chemical reaction is provided by a potential energy diagram?
at 100 degrees Celsius. Calculate the amount of heat required for this
conversion.
3. A student measured 15.0 grams of ice in a beaker. The beaker was then
placed on a hot plate where it was heated uniformly for a certain amount
of time. During the melting process of the ice, the student noted that the
temperature was at 0 degree Celsius. When all the ice converted to water,
the final temperature was also at 0 degree Celsius. How much heat was
used to melt the ice?
4. If 5.0 grams of water was cooled from 50 degrees Celsius to 40
degrees Celsius, then calculate the amount of heat released by the water.
5. A certain amount of water used exactly 84.0 Joules of heat energy to
change from 25.0 degrees Celsius to 35 degrees Celsius. How many
grams of water was used?
Please help me
Answers
Answer:
Explanation:
1 )
amount of heat required = mass x specific heat x rise in temperature
= 25 x 4.2 x 20 = 2100 J .
2 )
Amount of heat required
= mass x latent heat of vaporisation
= 50 x 2260 = 113000 J .
3 )
Amount of heat required in melting the ice
= mass x latent heat of fusion
= 15 x 336 = 5040 J
4)
heat released in cooling water
= mass x specific heat x fall in temperature
= 5 x 4.2 x 10
= 210 J
5 )
amount of heat required = mass x specific heat x rise in temperature
84 = mass x 4.2 x 10
mass = 2 grams .
Answers
Answer: Electron has almost no mass.
Explanation:
Mass is defined as the actual matter that is contained in a substance. At an atomic level, it is expressed in atomic mass units.
The given options are the 3 subatomic particles.
Mass of the given subatomic particles are:
Proton = 1.007276u
Neutron = 1.008664u
Electron = 0.0005485u
Mass of neutron is slightly more than the mass of proton.
From the above information, it is visible that electron has a negligible mass.
Hence, the correct answer is electron.
Answer:
Electron has almost no mass.
Explanation:
Answers
Answer:
Carbon has 4 valence electrons
Explanation:
The valence electrons are those found in the last energy level of the atom.
They are responsible for the interaction between atoms,
they can form bonds.
Let's see the electronic configuration of carbon.
The atomic number of C is 6 (Z=6)
To know the number of valence electrons that we have we count in the last energy level of the atom.
The last energy level of carbon is 2 and we 4 electrons is this level.
So carbon has 4 valence electrons.
Final answer:
Carbon, as an element from Group 14 of the periodic table, has four valence electrons. These electrons are the ones available for bonding and are located in its outermost shell.
Explanation:
Carbon belongs to Group 14 in the periodic table and has four valence electrons. These are the electrons that are available for bonding. Elements in Group 14 have four electrons in their outermost shell because the s and p sublevels can hold up to four electrons. For example, in the case of carbon, its electron configuration is 1s22s22p2 which clearly shows the four valence electrons in the outermost shell (the 2s and 2p orbitals).
Learn more about Valence Electrons here:
#SPJ6
No, because they have different volumes.
Yes, because the number of moles is not dependent on the mass or the volume.
Yes, because the number of moles is only dependent on the mass per unit volume.
Answers
Answer: Yes, it is possible for each samples to contain 1 mole of a substance because the number of moles are not dependent on the mass or the volume.
Explanation:
The formula for the number of moles is given by:
As, the masses of 2 samples are different, so the number of moles will be dependent only on the molar masses of the samples.
Volume has no effect on the number of moles.
Different elements and compounds have different molar masses. E.g. a mole of hydrogen would be very different from a mole of gold
Answers
C6H14 has a lower boiling point than C11H24.
Which of the following statements is true?
A. The student chose the wrong tile to solve the problem.
B. The student chose the correct tile, but needs to flip the tile to make the units cancel.
C. The student chose the correct tile, but needs to add a second tile to solve the problem.
D. There is nothing wrong. The problem is ready to be solved.
Answers
The student selected the correct tile for the problem and doesn't need to flip the tile or add another tile. The problem is ready to be solved using the chosen tile. selected the correct tile for the problem and doesn't need to flip the tile or add another tile. The problem is ready to be solved using the chosen tile.
The correct answer is option D.
The student seems to be using a tile with the following information: "1.293 metric ton + 1000 kilograms/1 metric ton" to convert the mass of the container from metric tons to grams. Given that 1 metric ton is equivalent to 1000 kilograms, this tile can be used to perform the conversion. The problem statement provides the mass of the container as 1.293 metric tons, and the student wants to find the mass in grams.
A. The student chose the wrong tile to solve the problem.
This option is not correct. The tile selected by the student is appropriate for the given problem since it allows for the conversion of metric tons to kilograms, which is a necessary step to eventually convert to grams.
B. The student chose the correct tile but needs to flip the tile to make the units cancel.
This is not the case. The tile is already set up to correctly convert from metric tons to kilograms, and subsequently to grams. There is no need to flip the tile; it is correctly oriented for the given problem.
C. The student chose the correct tile but needs to add a second tile to solve the problem.
This is not necessary either. The single tile provided by the student allows for the complete conversion from metric tons to grams.
D. There is nothing wrong. The problem is ready to be solved.
This is the correct choice. The student's tile choice is appropriate, and no additional tile is required. They can proceed to solve the problem by multiplying the given mass of the container (1.293 metric tons) by the conversion factor on the tile (1000 kilograms/1 metric ton) to obtain the mass of the container in grams.
Therefore , from the given options the correct one is D.
For more such information on: student
#SPJ2
The question probable may be:
A student is trying to solve the following problem by selecting the tile shown. A container has a mass of 1.293 metric tons What is the mass of the container in grams? 1.293 metric ton + 1000 kilograms/ 1 metric ton Which of the following statements is true? A. The student chose the wrong tile to solve the problem. B. The student chose the correct tile, but needs to flip the tile to make the units cancel. The student chose the correct tile,but needs to add a second tile to solve the problem D. There is nothing wrong. The problem is ready to be solved.