Is it possible to identify something as an element, compound or pure substance

Predict what will observe in below mention experiment. Rock candy is formed when excess sugar is dissolved in hot water followed by crystallization. A student wants to make two batches of rock candy.

Heterogeneous materials are always mixtures. Are homogeneous materials always pure substances? Explain.

I'm doing a project in school on liquids and gasses and I wanted to know if air conditioning is a gas?

Which source gives patient drug information in lay language

A 130.0-mL sample of a solution that is 3.0*10-3M in AgNO3 is mixed with a 225.0-mL sample of a solution that is 0.14M in NaCN. After the solution reaches equilibrium, what concentration of Ag + (aq) remains?,

Which of the following is the correct formula for copper (1) sulfate trihydrate? o Cu 250 4.3H 20 o CuSO 4 - 3H 20 o Cu 250 4 (H 20) 3 CusO 4 (H 2013

Discuss the advantages and disadvantages of using hydropower for large-scale energy production.

Is the following is a correct statement of Charless Law? The volume of a gas varies directly with the absolute temperature under the conditions of constant pressure.

Why do you need blood?

How many nitrate ions are present in. 200 mol of Zn (NO3) 2?