What category of elements does krypton gas belong to?A. metals
B. metalloids
C. non-metals
Answers
The correct answer is C. Non-metals
Explanation:
Krypton is one of the 118 chemical elements that have been identified. Krypton's main characteristics include lack of odor, color, and low reactivity, due to this, this element is classified as a noble gas and in the periodic table is part of the Group 18. Moreover, Krypton is part of the non-metals category that includes elements with low density, melting/boiling point, and conductivity, which are all features exhibit by Krypton as this has low electricity and heat conductivity, low density, low melting point (around -157 °C) and low boiling point (-153 °C). Thus, the category Krypton gas and in general Krypton belongs to is non-metals.
An element is a pure substance made up of only one kind of atom, each of whose nuclei contains the same amount of protons. A substance whose atoms all contain the same number of protons is said to constitute an element; alternatively, all the atoms of a certain element must contain the same number of protons. Here 'Kr' is a non-metal. The correct option is C.
The elements that absorb or gain electrons to generate negative ions are known as non-metals. In their outermost shell, non-metals often have 4, 5, 6, or 7 electrons. High electronegativities are seen in non-metals. This indicates that non-metal atoms exhibit a significant propensity to attract more electrons than they would ordinarily have.
Krypton is a Group 18 rare gas and chemical element with the atomic number 36 and the symbol Kr.
Thus the correct option is C.
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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.
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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.
Answers
Answer:
The answer to your question is m = 52.22 g
Explanation:
Data
mass of Cu = ?
Energy = 2653.8 J
temperature 1 = 155°C
temperature 2 = 23°C
Specific heat = 0.385 J/g°C
To calculate the mass of Copper, use the formula of specific heat and solve it for mass.
Formula
Q = mC(Temperature 2 - Temperature 1)
Solve for m
m = Q / C (Temperature 2 - Temperature 1)
Substitution
m = 2653.8 / 0.385(23 - 155)
Simplification
m = 2653.8 / 0.385(132)
m = 2653.8 / 50.82
Result
m = 52.22 g
Answer:
The mass of the copper is 53.22 grams
Explanation:
Step 1: Data given
Energy = 2653.8 J
Initial temperature = 155 °C
Final temperature = 23°C
Specific heat of copper = 0.385 J/ g°C
Step 2: Calculate mass of copper
Q = m*c*ΔT
⇒ with Q = the energy = 2653.8 J
⇒ with m = the mass of copper = TO BE DETERMINED
⇒ with c= The specific heat of copper = 0.385 J/g°C
⇒ΔT = The difference in temperature = T2 - T1 = 23 - 155 = -132°C
2653.8 J = m * 0.385 J/g°C * 132 °C
m = 2653.8 / (0.385*132)
mass of copper = 52.22 grams
The mass of the copper is 53.22 grams
Answers
Answer:
which one do u want help with?
Explanation:
Answers
A. Ar
B. CO
C. CO2
D. NaCl
Answers
Answers
Answer: Helium is least likely to form bonds.
Explanation:
Helium has the electronic configuration . As the 1s sub-shell is completely filled so there is no need for helium to form bonds with other atoms.
Whereas, nitrogen has the electronic configuration . As the p sub-shell is half filled, it has the tendency to accept more electrons. Therefore, nitrogen is more susceptible to form bonds as compared to helium.
Thus, it is concluded that helium is least likely to form bonds.