Organisms get the energy and building materials that they need from food. what is the ultimate source of energy for food?

Consider the reaction between TiO2 and C: TiO2 (s) + 2C (s) → Ti (s) + CO (g) A reaction vessel initially contains 10.0g each of the reactants.

A runner wants to run 13.1 km. She knows that her running pace is 6.2 mi/h. How many minutes must she run? Hint: Use 6.2 mi/h as a conversion factor between distance and time.

If there are two similar, oxygen - containing ions, the ion with more oxygen atoms ends in

Which is the most accurate description of compounds? a. they are not pure substances. b. they are made of only 1 type of atom. c. they are the basic building blocks of matter. d.

Identify whether each compound will ionize or dissociate in water. Sodium sulfate (Na2SO4) Ammonium phosphate ((NH4) 3PO4) Sulfuric acid (H2SO4) Potassium iodide (KI)

Why is it possible to safely drink a solution that contains a 50:50 mixture of equal concentrations of a strong acid and a strong base, either of which, if ingested separately, would be very caustic and damaging?

Explain why many compounds that contain one or more hydrogen atoms are not classified as arrhenius acids

pure substance x is a green powder. when heated, it gives off a gas and changes to a black powder. is substance x an element or a compound? give reasons

What amount (moles) is represented by each of these samples? a. 20.0 mg caffeine, c8h10n4o2 b. 2.72 1021 mo?

A sample of gas occupies 40.0 mL at - 123°C. What volume does the sample occupy at 27°C if the pressure is held constant? V1T2 = V2T1 Don't forget to convert temperature to kelvin! Group of answer choices 8.80 mL 20.0 mL 80. ML 182 mL