General Chemistry Answers

Does the temperature of a solution of copper 2 sulphate alone changes?

Explain why it is better to add Carbon dioxide to soda mixture at colder temperatures.

 The temperature of a sample of a substance changes from 10.°C to 20.°C. How many Kelvin does the temperature change? 

If 0.500 moles of hydrogen gas were produced , calculate how many grams of hydrogen gas was made ?

Three phase in which water exist

We know that Chromium has 5 electrons in 3d and 1 electron in 4s. Another example, Copper has 3d10 and 4s1. What knowledge of spectroscopy shows us this matter? I mean what is the reason for this matter? I know about orbitals. Our teacher says it has physical phenomena. I'm looking for that. Please explain completely. Thank you!

2.5 g of iron powder are added to 100 mL of a 0.75 mol/L copper (ll) sulfate solution

1- determine the composition of the solution in molar concentration when the reaction ceases?

2_ what is the mass of copper produced

what is the wavelength of microwaves with frequency of 6x10^14 Hz?

have 5 electrons in its Lewis dot symbol

balance chemical equation of Cr (s) + Cl2 (g) → CrCl3 (s)