Is this reaction endothermic or exothermic

d) NH4NO3 (s)  NH4 + (aq) + NO3 - (aq) [Note, this is the reaction that takes place in a cold pack]

A mixture of cuso4?5h2o and mgso4?7h2o is heated until all the water is lost. if 5.020 g of the mixture gives 2.988 g of the anhydrous salts, what is the percent by mass of cuso4?5h2o in the mixture?

1.) Which of these statements correctly compares probeware (such as an electronic temperature probe) to traditional analog tools (such as a liquid-based thermometer) A) measurements by traditional analog tools are good to a larger number of

What is the best way to compare a concentrated solution to a dilute solution, given the same volume of solution? A. The concentrated solution has less solute than the dilute solution. B.

Explain the effects of nh3 and hcl on the cuso4 solution in terms of le chatelier's principle

A particle with 10 protons, 11 neutrons, and 12 electrons has a mass number of:

How many of the following elements have 2 unpaired electrons in the ground state? C Te Hf Si A) 1. B) 2. C) 3. D) 4.

Which has a higher frequency, a neutron or electron? Why?

1) Identify the intensive properties of a sample of matter: A. mass B. hardness C. color D. volume E. reflectivity

Suppose you have a buffer containing 0.400 M hydrazine and 0.300 M hydrazinium chloride at equilibrium. Then you add 25.2 g of NaOH to 2.0 L of the buffer. What change in pH is caused by the addition of the base? A) 0.99 B) 0.40 C) 8.71 D) - 0.36

The heart is an example of which level of organization within an organism? O cell organ tissue organ system O O