Describe the three values in a learner-centred curriculum that a teacher can use to create a pedagogy of care in the classroom.​

Achemistry student weighs out 0.306 g of citric acid (h3c6h5o7), a triprotic acid, into a 250 ml volumetric flask and dilutes to the mark with distilled water. he plans to titrate the acid with 0.1000 m naoh solution. calculate the volume of naoh solution the student will need to add to reach the final equivalence point. be sure your answer has the correct number of significant digits.

Balance the following reaction. as2s3 + 9o2 → 2as2o3 + so2

What is the correct name for hg(no3)2? mercury (i) nitrate mercury (ii) nitrate mercury nitroxide mercury dinitride