Is cutting a paper snowflake a chemical or physical change and why?

How much energy is needed to warm 7.40g of water by 55 degress C?

Science greatly advanced when Galileo favored

Type the correct answer in the box. Oxygen is in group 16, and it has v alence electrons. Reset Ne

Which kind of material would best accomplish this task?

The thermal energy of an object measures ... Question 14 options: the average kinetic energy of the molecules of the object the total kinetic energy of the molecules of the object the maximum kinetic energy of the molecules of the object

Which would exhibit characteristics of both a metal and a nonmetal? select one: a. si b. ge c. sb d. po e. all of the above exhibit characteristics of both a metal and a nonmetal?

In the synthesis reaction, the white powder produced is magnesium oxide (mgo, mm = 40.3 g/mol). how many moles of magnesium oxide were formed (number of moles = mass (g) / molar mass (g/mol)) ? choose the closest answer. a. 0.21 moles b. 0.

Which of the following is the most likeley example of an favorable mutation A. A mutation that makes a rabbit able run faster B. A mutation that changes the rabbit's fur to bright orange C. A mutation that changes the color of the rabbit's eyes D.

Which of these mole ratios is possible for this reaction? FeCl3 + 3NaOH → Fe (OH) 3 + 3NaCl 1:1 1:3 3:1 2:3

The chemical equation for reduction of phosphorite Ca3 (PO4) 2