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.
- What name is given to a reaction that takes in energy from the surroundings?Give the full name.
- Look at the nutritional facts below. How many grams (g) of unsaturated fat are there in 240g of this low-fat spread? Nutritional facts: Fat makes up 35% of the 35% weight of this low-fat spread. - (3)/(4) of this fat is unsaturated fat.
- a Find the mass of an ion of (}_{6)^12C^+ in kg. Give your answer to the appropriate number of significant figures . The Avogadro number , L,is 6.022times 10^23mol^-1
- Connie was making sodium chloride by adding an acid to an alkali. She followec I the progress of the reaction with a pH I sensor. At which pH would she know that the acid and alkali had completely reacted to give a salt solution?
- Reactions 6 a Look at the statements below. Tick the ones that show a chemical reaction is taking place. square New substances are made. square You can get back what you started with. square You notice a sweet smell being produced. square The substance dissolves when being stirred into water. square Bubbles appear in the substance. (3 marks) Look at the picture of the student carrying out the experiment Identify one safety precaution she is following. __ c When using liquids they may be dangerous. Choose the name of the type of hazard for each description. Circle the correct answer. Could cause slight swelling or redness on skin: irritant/corrosive Could burn skin and eyes: irritant/corrosive (2 marks) 2 Match the type of substance with the pH that they will be. Substance PH neutral less than 7 alkali greater than? acid equal to 7 (2 marks) 3 a Complete the sentences below about the chemical properties of metals and non-metals by circling the correct answers from the choices in bold. When a metal or a non-metal reacts with oxygen an oxide/oxate is formed. At room temperature (20PC)metal oxides are mostly solids/gases and non-metal oxides are mostly solids/gases. They are also different types of substances. Non-metal oxides are mostly bases/acids and metal oxides are mostly bases/acids. (4 marks) Complete the word equation for the reaction of a metal and an acid. metal+acidarrow (2 marks) 4 a List three properties of metals. __ b Name a metal and a non-metal that is liquid at room temperature. __ Non-metal: __ may have