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.

- The number of protons in an atom determines the identity of the atom. Atomic #= it Protons - In a neutral atom, the number of positive protons equals the number of negative electrons. # Protons = # Electrons - Protons and neutrons both have a mass of 1 amu. The mass of the electron is negligible compared to the mass of the proton and neutron. Thus, the mass number, or the mass of the atom, is the sum of the number of protons and neutrons. Mass # = Protons + # Neutrons Name & Symbol & Atomic # & Mass # & Protons & # Neutrons & #Electrons Selenium & & & & & 46 & & & & 222 & 86 & & & & & & & 118 & 79 & & 11 & & & 12 &

For each of the following reactions: CH_(3)COOH(aq)+O_(2)(g)arrow AlCl_(3)(s)+Cs(s)arrow HNO_(3)(aq)+Fe(OH)_(3)(s)arrow 1. Predict the products. 2. Write down the balanced equation. 3. Identify the type of the reaction. Edit

(b) Magnesium oxide reacts with dilute hydrochloric acid to produce magnesium chloride solution and water. MgO(s)+2HCl(aq)arrow MgCl_(2)(aq)+H_(2)O(l) Write the ionic equation for this reaction. pH=

The test for STARCH uses which of these? Burning Splint lodine solution Limewater Pure water

Chromatography can be used to separato components of a mixture. a4. (a) A student set up the apparatus without making any errors. The chromatogram in Dlagram 2 shows the student's rosults. Dlagram 2 (i) What do the results tell you about the composition of the black food colouring? __ (ii) Use Diagram 2 to complete Table 1. Table 1 square square (iii) Use your answers in part (b) (ii)to calculate the R value for food colour C. (2) R_(f)value= (1)