Patrick wants to test three different brands of baseball bats to see if they impact how far
he can hit a baseball. He goes to Sports Authority and buys a Brueller bat, a Yost bat,
and an Emerald bat. He takes his first swing at home base with the Brueller bat and hits
the ball 25 m. He takes his second swing at home base with the Yost bat and hits the
ball 20 m. He takes his third swing at home base with the Emerald bat and hits the ball
55 m.
1. What is the independent variable? (5 points)
I
2. What is the dependent variable? (5 points)
3. What is the controlled variable? (5 points)
Answers: 2
Chemistry, 21.06.2019 20:30
1. calculate the approximate enthalpy of the reaction in joules. estimate that 1.0 ml of vinegar has the same thermal mass as 1.0 ml of water. iqnore the thermal mass of th sodium bicarbonate. note: it takes about 4.2 joules () to change 1.0 gram (1.0ml) of water 1.0 c
Answers: 2
Chemistry, 22.06.2019 18:00
Answer asap need it by wednesday morning carry out the following calculations on ph and ka of from data. i. calculate the ph of 0.02m hcl ii. calculate the ph of 0.036m naoh iii. calculate the ph of 0.36m ca(oh)2 iv. calculate the ph of 0.16m ch3cooh which has ka = 1.74 x 10-5 mol dm-3 v. calculate ka for weak acid ha which has a ph of 3.65 at 0.30m concentration vi. calculate the ka of a solution made by mixing 15.0 cm3 0.2m ha and 60.0 cm3 0.31m a-. [ph= 3.80] vii. calculate the ph of a solution made by mixing 15.0 cm3 0.1m naoh and 35.0 cm3 0.2m hcooh. [ka = 1.82 x 10-4 m]
Answers: 1
Chemistry, 22.06.2019 21:00
Once similarity and one difference between a mixture of elements and a mixture of compounds
Answers: 3
Patrick wants to test three different brands of baseball bats to see if they impact how far
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