What does it mean in the first compound notation?

Hydrated coppper (II) sulfate  is heated, how do you know when the dehydration is complete? Group of answer choices The mass increases until it no longer changes. The color will change from blue to white. The color will change from white to blue. The mass decreases until it no longer changes.

Pls help ASAP on both questions I HUMBLY REQUEST

Remdesivir is a broad-spectrum antiviral medication that is currently being used to treat Covid- 19. Remdesivir has this chemical formula: C27H35N6OgP. Since it is made up of nonmetals, Remdesivir is a molecular compound. Answer the following questions about samples of Remdesivir.

Order them in decreasing order of the amount of oxygen. = Chlorate = Hypochlorite = Chlorite = Perchlorate

How do I differentiate an acid from a base by simply looking at the name of each given compound?

Select which is appropriate in completely classifying gaseous oxygen O2. Homogeneous mixture Pure substance Mixture Compound Element Heterogeneous Mixture

3. Seven compounds Compound Formula Physical State Color carbon dioxide carbon disulfide copper(1) oxide copper(II) oxide copper(II) chloride iron(III) oxide iron(II) chloride

Question 12 Which of these are compounds (not elements)? O NaCl O CaCI2 CaCl2 T H2 ON2

determine the number of each type of atom in NH4Cl