Chemistry Homework Assistance
QuestionAI's chemistry problem solver is a middle school chemistry tutoring tool that summarises key chemical reactions and equations in real-time, featuring a robust learning system to empower even those with a weak foundation in chemistry.
You needn't fret over the elemental properties of the periodic table anymore. Here, you can effortlessly access chemical reactions and reaction principles corresponding to each element. Deductive reasoning from microscopic phenomena to discern the original structure of molecules and atoms is a research technique we staunchly champion.
- MULTIPLE CHOICE QUESTION This atom is called lithium -7 Why does it have this name? It has 7 subatomic particles. It has 7 protons. Its atomic number is 7. Its mass number is 7.
- (ii) Potassium is higher in the reactivity series than calcium and reacts more vigorously with water than calcium reacts with water. State why potassium is higher in the reactivity series and reacts more vigorously with water than calcium.
- Lo 10 . Choose the best answer. When two or more atoms chemically combine, a(n) __ is formed. atom lipid molecule protein
- 2 The reaction between zinc carbonate and hydrochloric acid can be used to make zinc chloride. The equation for this reaction is: ZnCO_(3)(s)+2HCl(aq)arrow ZnCl_(2)(aq)+H_(2)O(l)+CO_(2)(g) 6.25 g of ZnCO_(3) was added to a solution containing 1.825 g of HCI. a Which reactant is in excess? Show your reasoning. __ b What mass of zinc chloride would you expect to make? __ (A, values: Zn=65,Cl=35.5,H=1)
- 2. One side of the water molecule has a positive charge, while the other side has a negative charge. What do the charges indicate about the molecule? a. Water is a polar molecule. c. Water is an ionic compound. b. Water is a nonpolar molecule. d. Water is an ion.