Chemistry, 02.09.2019 00:00 shiiIjustneedananswe
Investigations were carried out in a science lab to explore the topic of chemical and physical changes. investigation a step 1. add 5 tsp. salt to 100 ml warm water and stir until most or all of the salt is no longer visible. step 2. heat the salt solution on a burner until only a white solid remains. investigation b step 1. mix 10 tsp. white sugar into 100 ml water and stir until most or all of the sugar is no longer visible. step 2. heat the sugar solution on a burner until the solution thickens and turns brown. in which step(s) did a chemical change most likely occur?
Answers: 2
Chemistry, 22.06.2019 05:40
Calculate: select the worksheet tab. this tab you calculate the analyte concentration. fill in the first set of boxes ("moles h2so4" and "moles naoh") based on the coefficients in the balanced equation. (if there is no coefficient, the value is 1.) record the appropriate volumes in the "ml naoh" and "ml h2so4" boxes. record the concentration of the titrant in the m naoh box. click calculate. what is the concentration listed
Answers: 2
Chemistry, 22.06.2019 06:00
There are 6.022, 104 atoms of hg in 1 mole of hg the number of atoms in 45 moles of hg can be found by multiplying 4.5 by 6.022, 102 which is the number of atoms in 4.5 moles of hg, correctly written in scientific notation with the correct number of significant figures? 0 21,109 0 21,100 271, 1024 27.099, 100 mark this and retum save and exit submit
Answers: 1
Chemistry, 22.06.2019 12:00
Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.
Answers: 2
Investigations were carried out in a science lab to explore the topic of chemical and physical chang...
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