If we place 0.00200 mol HCl (aq) and 0.00200 mol NaOH (aq) in our calorimeter with 50.0 mL (so 50 g) of water what is the final temperature of the solution? [Assume negligible mass for the HCl and the NaOH and just calculate based on the H2O. H2O has a specific heat of 4.184 J g-1 C-1. The water starts at 21.000 C]

How many atoms are in 1.4 mil of phosphorus trifluoride (pf3)

Agas mixture with a total pressure of 745 mmhg contains each of the following gases at the indicated partial pressures: co2, 245 mmhg ; ar, 119 mmhg ; and o2, 163 mmhg . the mixture also contains helium gas. part a what is the partial pressure of the helium gas? phe p h e = nothing mmhg request answer part b what mass of helium gas is present in a 10.2-l sample of this mixture at 283 k ? m m = nothing g request answer

Sarah wants to know where in her garden chamomile would grow the best. she thinks chamomile will grow best in the corner of the garden that gets the most sunlight. to test her hypothesis, she decides to plant several groups of chamomile in her garden as an experiment. which of the following variables will sarah need to measure to know which group of plants grew best? a. the location of the plants b. the type of plants c. the height of the plants d. the amount of water she gives the plants