CHEMISTRY HIGH SCHOOL

What is the half-life of the substance as determined by the graph?

Answers

Answer 1

Answer:

Answer:

6.25

Explanation:

Because 2.5 is half and idk know how to explain but yeah

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Any temperature on the Kelvin scale can be changed to Celsius degrees bya. subtracting 100 from it.
b. adding 212 to it.
c. subtracting 273 from it.
d. subtracting 32 from it.

Answers

c. subtracting 273 from it.

C. Subtract 273 from it

An object has a momentum of 5 kg m/s and a mass of 2 kg. How fast is it moving?

Answers

Answer:

2.5 meter per second

Explanation:

momentum = mass multiplied by velocity

please mark me brainliest

A chemist wants to calculate the amount of heat that is absorbed by a sample of copper as it is melted. Which constant should she use?

Answers

She needs to use the heat of fusion (ΔH(fusion)) and the equation q=mΔH(fusion) or q=nΔH(fusion) depending on whether or not ΔH(fusion) is given in J/g or J/mol. The reason why temperature is absent from the equation is that temperature does not change at a phase change, only the enthalpy does.

I hope his helps. Let me know in the comments if anything is unclear.

Answer:

Hfus

Explanation:

This is correct on edge.

If the temperature of air increased, how would it affect the rate of condensation of water vapor

Answers

It will increase the rate of the condensation

when the temperature around the water vapor cooled down, it loses its capacity to hold the water, so they will for water droplets.

For example you can compare a warm cup of tea and a warm cup of tea with an ice in it. You will find a lot of water droplets in the iced one because cooler air could held less water than the warm one

Would the two as yet undiscovered elements A+1 and D+2 react?

Answers

Answer: No, the given elements will not react.

Explanation:

Ionic bond is defined as the bond which is formed from the complete transfer of electrons from one atom to another atom. The atom which looses electrons is known as electropositive atom and it attains positive charge. The atom which gains electrons is known as electronegative atom and it attains negative charge. For Example: KBr

Covalent bond is defined as the bond which is formed by the sharing of electrons between the atoms forming a bond. No ions are present in the compound. For Example: HCl

We are given, two elements with their oxidation states:

$A^+\text{ and }D^(2+)$