A student measures the mass and determines the volume of a cubic object to determine its density. The student recorded a set of data; 2.86 cm, 2.79 cm and 2.82 cm. He massed the object and recorded 23.7 g. The actual density of the object is 0.987 g/cm^3. What is the volume of the cubic object? (Enter the answer to three significant figures. Then enter a space and then enter the correct unit. Please use the abbreviation for the unit and not the word(s). For example, "g" and not "grams".)

Temperature and kinetic energy are proportional. a) adirectly b) directly c) indirectly

Which real-world scenarios below represent physical and chemical changes? -running a car -exploding fireworks -mixing water and powdered drink mix -combining oil and vinegar to make salad dressing -taking aspirin for a headache -diluting bleach with water-digesting dinner-spreading peanut butter on bread

Oxidation-reduction reactions (often called "redox" for short) are reactions that involve the transfer of electrons from one species to another. oxidation states, or oxidation numbers, allow chemists to keep track of these electron transfers. in general, one element will lose electrons (oxidation), with the result that it will increase in oxidation number, and another element will gain electrons (reduction), thereby decreasing in oxidation number. the species that is oxidized is called the reducing agent or reductant. the species that is reduced is called the oxidizing agent or oxidant. to sum up: oxidation = increase in oxidation state = loss of electrons = reducing agent reduction = decrease in oxidation state = gain of electrons = oxidizing agent part a which element is oxidized in this reaction? fe2o3+3co→2fe+3co2 enter the elemental symbol. view available hint(s) is oxidized part b which element is reduced in this reaction? 2hcl+2kmno4+3h2c2o4→6co2+2mno2+2kcl+4h2o enter the elemental symbol. view available hint(s) is reduced