Is chilli a element compound or mixture?

Describe the chemical reactivity between potassium metal and helium gas

Lead (ii) sulfide (pbs) has a ksp of 3.0 * 10-28. what is the concentration of lead (ii) ions in a saturated solution of pbs? 1.7 * 10-14m 1.5 * 10-14m 3.0 * 10-14m

Which phrase describes a solution? A. a homogeneous mixture B. a graduated substance C. a heterogeneous mixture D. a primary mixture of elements

Which coefficients balance the following equation? __ Pb (OH) 2 + __ HCl = __ H2O + __ PbCl2 A. 2, 2, 2, 2 B. 1, 2, 2, 1 C. 2, 1, 1, 2 D. 2, 1, 2, 1

How could you separate a mixture of acetone and a-naphtol

8) Rubidium [Kr]5s has an atomic radius of 248pm. Tin, another period 5 element, has an atomic radius of 140pm. What would the correct atomic radius for xenon be? Xenon is also in Period 5 and a noble gas.

A 2.7 M solution contains 0 2.7 moles of solute per 1000 g of solvent. 2.7 moles of solute per 1000 mL of solution. 0 2.7 grams of solute per 100 mL of solution. 0 2.7 grams of solute 100 g of solution. per

What is the molar concentration of Cu2 + in a solution that is labelled 5 ppm Cu2+? a) 7.9x10^ (-5) M b) 7.9x10^ (-6) M c) 5.1x10^ (-6) M d) 5.5x10^ (-4) M

Drag each tile to the correct box. A student writes down several steps of the scientific method. Put the steps in the best order. Analyze the experimental data. Make a hypothesis. Conduct an experiment. Communicate the results.

What is a glass rod used for in chemistry and biology laboratory?