Are temperature and heat physical or chemical properties?

Answers

Answer 1

Answer: It is a chemical property

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What is the SI base unit for time?
Why is HBrO a weaker acid than HBrO3? A. The HO bond in HBrO is less polar than the HO bond in HBrO3 B. The HO bond in HBrO is more polar than the HO bond in HBrO3 C. The HBr bond in HBro is weaker than the HBr in HBrO3 D. The HBr bond in HBrO is stronger than the HBr bond in HBrO3 E. The HO bond in HBrO is weaker than the HO bond in HBrO3
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Arrange the following elements in order of increasing atomic radius : Rb , K , Na , Li

Answers

Generally, atomic radii have this property on the periodic table: as you go down or left, the radius of an atom gets larger.

With this logic, let's apply this to the problem above. Li is on the highest part of the table compared to the other elements. Below it is Na, then K, then Rb. From our rule, we know that as we go down on the table, the atomic radius gets larger.

Thus, Li has the smallest radius, and Rb has the largest radius.

FINAL ANSWER: Li, Na, K, Rb

Final answer:

The order of increasing atomic radius for the elements Li, Na, K, and Rb is Li

Explanation:

The arrangement of the following elements in increasing atomic radius: Li, Na, K, and Rb indicates that the atomic radius increases as we move down a group in the periodic table. This group of elements, Li, Na, K, and Rb, are all alkali metals and exhibit similar chemical behaviors. As the atomic number or Z increases, the atomic radius also increases. For example, Lithium (Li) has an atomic number of 3, Sodium (Na) 11, Potassium (K) 19, and Rubidium (Rb) 37. As we move down the group from Li to Rb, both Z and the atomic radius increase.

Learn more about Atomic Radius here:

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These four ELEMENTS were found in early earth and they make up all living things.A) True
B) False
The four elements:
Hydrogen
Oxygen
Carbon
Nitrogen

Answers

Answer: True

Air is a mixture of many things; it's not just Oxygen, but Hydrogen, Carbon, and Nitrogen as well are made up of air. Fun fact: Nitrogen is actually more abundant in air

Its is A. true ($:!:!:!:!::!/!!2!2$2$2$:$!:!.!.!.!.!:!!..!!:!:!:!:!:!:!!:!:!:!:!)))

Which element, represented by X, reacts with fluorine to produce the compound XF2?

Answers

Elements in Group 2 of the periodic table.

Which statement best explains why heating a liquid affects its viscosity?

Answers

The statement that best explains why heating a liquid affects its viscosity is that "The molecules move faster at higher temperatures and overcome attractions more easily.". Remember that viscosity is a physical property of the fluids that measure the resistance (opposition) to flow and it, generally decreases, as the temperature increases and the intermolecular force decrease.

Answer:

aka: A

Explanation:

what is the molarity of a concentrated hbr solution if the solution is 27.7% hbr by mass and has a density of 1.24 g/ml

Answers

Answer:
M = No.of moles of solute / Volume of solution in litres
HBr: H = 1 x 1 = 1 Br = 1 x 80
Molar mass : 81 g / mol
a. n = 27.7% / 100 =0.277 g / (81 g / mol) = 0.0034 mol

density = 1.24 g/ml ; D= m / v

b. 65.32 ml x 1 L / 1000 mL = 0.065 L


c. M= n / V
= 0.0034 mol / 0.065 L
M= 0.052 mol / L

The molarity of the concentrated HBr solution is 0.052 mol/L

What is the charge on a chloride ion? What does chlorine have to do to form such an ion, and whydoes it tend to do so?

Answers

Answer:

The chloride ion has a -1 charge and it tends to form such an ion because it wants the octet rule to be complete, and since it has 7 it needs one more for 8 electrons.

Hope this helps!

Explanation:

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