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.

18. Purity is a major factor in determining the type of coal used for energy. Which of the following types of coal are correctly paired with a description of its purity and common uso? a. Anthracite is considered the highest grade coal because it is almost pure carbon.and it is often used for domestic heating. b. Coking coal is most widely available and contains 60-86% carbon, which makes it ideal for use in coal power plants. c. Steam coal has a high carbon content with low amounts of impurities which makes it ideal for use in the steel industry. d. Lignite is the most mature and purest form of coal, and it is often used for large-scale power generation.

Instructions 1. Take a chunk of chalk and measure its mass on the balance: __ 2. Go outside and draw something on the sidewalk. 3. Go back in class and weigh the unused chalk: __ 4. Based on the initial mass of the chalk and the mass at the end, calculate how many grams of chalk you left out on the sidewalk: __ 5. Write down the molecular formula of the chalk: __ 6. Get the masses of the atoms: 7. Calculate the chalk's molar mass: __ 8. Using this data, calculate: a. How many moles of chalk did you leave on the sidewalk? __ b. How many molecules of chalk did you leave on the sidewalk? __ c. How many atoms of calcium did you use? __ d. How many atoms of carbon did you use? __ e. How many atoms of oxygen did you use? __

Select the correct answer. The image shows a molecular model of a compound using balls and sticks. Each ball is an atom and each stick is a bond If you were to use balls and sticks to model a molecule of an element how must your model differ from what's shown? A.The sticks must be shorter B. The balls must be the same color. C. The balls must be smaller D. The balls must change to cubes

Use the balanced "ham sandwich" equation below to answer the following question. 2H+C+T+5P+2Barrow H_(2)CTP_(5)B_(2) You have 12 slices of ham ( H ), 4 slices of cheese (C) 5 tomato sices (T) 15 pickles (P) , and 10 slices of bread (B). The reactant which determines the maximum amount of product that can be formed is called the limiting reactant. What is the limiting reactant? a ham b bread c cheese d pickles

Select all that apply From the following properties select the properties that are not classified as an intensive property. Total mass Density Total momentum Temperature Pressure