A 50 g piece of aluminum is heated to 800c and then dropped into cold water, where the metal's temperature drops to 300c. how many calories does it lose to water? (specific heat capacity of aluminum is. 21 cal/g0c)

Number of hydrogen atoms in NaC2HO4

Indicate how the concentration of each species in the chemical equation will change to reestablish equilibrium after a decrease in pressure or volume. If there is no change in the concentration of the species, leave the box blank.

If the atomic number of an element is 6 and its mass number is 13, how many protons are contained in the nucleus

Give two differences between mixture and compound

7. The molar mass of carbon is 12.0 g/mol, of hydrogen is 1.0 g/mol, and of oxygen is 16.0 g/mol. How would you calculate the molar mass of ethanol (C2H60) ? • 9 mol * 6.02 x 10^23g • 2 x 12.0g/mol + 1 x 16.0 g/mol • 9 mol (12.0 g/mol + 1.

Which of these would have a frequency greater than an X-ray A UV ray B violet light C microwave D gamma ray

What is true about exothermic reactions? A. More heat is given off than is put into the reaction. B Energy from an outside source is continuously being added. C. The reaction container always feels cold. D.

What are the three fundamentals particles of an atom

A temperature of 37°C is equivalent to a temperature of (1) 98.6 K (3) 310. K (2) 236 K (4) 371 K

A 6.0 mol sample of C3H8 (g) and a 20. mol sample of Cl2 (g) are placed in a previously evacuated vessel, where they react according to the equation above.