1. Julius observes the chemical reaction between chalk and hydrochloric acid in a beaker. Which of the following will not cause the rate of reaction
а
to increase? *
a) breaking down the chalk into small pieces
b) cooling the chalk in a freezer
c) heating the hydrochloric acid on a hot plate
d) using a stirring rod to agitate the beaker's contents

pure water does not conduct electricity very well. however, when certain substances are dissolved in water, the solution does conduct electricity. you can make a simple device that shows how well a solution conducts electricity. this device uses a flashlight bulb to indicate how well the solution conducts electricity. the better the solution conducts electricity, the brighter the bulb will glow.

explanation:

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer