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.
- Q12. The diagrams show two Bunsen burners. One burner has the air hole closed, and the other has the air hole open. (a) Explain why opening the air hole of a Bunsen burner makes the flame hotter. There is more oxygen...added to the flcune. (b) Natural gas is methane, mathrm(CH) 4 . It is burned in a Bunsen burner. Complete the word equation for the chemical reaction in the clear blue flame methane + oxygen...... arrow
- (c) A scientint sot up two test-fubes as shown below. In test-tube B the zing strip was slowly covered with a grey deposit. Nothing happened in the other test-tube. (i)What was the grey deposit in test-tube B? __ (ii)Why was this grey deposit formed in test-tube B? __ (iii) Explain why no reaction took place in test-tube A. __ Q7. For 200 million years the proportions of the different gases in the atmosphere hav much the same as today. Over the past 150 years the amount of carbon dioxide in atmosphere has increased from 0.03% to 0.04% (a) Describe how carbon dioxide is released into the atmosphere by human an industrial activity; __
- as. Some students investigated was repeated chip was weighed. ffect of sucrose concentration on the change in mass of The results are showing five more are shown in beefroot chips and five different concentrations of sucrose solutic Figure 6 (i) Calculate the percentage change in mass for chip 5. Give your answer to an appropriate number of decimal places. (ii) Explain the difference in the changes in mass of chip 5 and chip 2.
- Nhich energy profile best shows that the formation of NO_(2) requires 33.1 kJ/mol A. Energy profile A B. Energy profile D C. Energy profile C D. Energy profile B
- What should be recorded when freezing food? Choose 3 Name of person who made the food Contents Temperature it was cooked at Use by date Date frozen