Question 2
How many moles of CaBra are there in 5.0 grams of CaBrz? SHOW WORK!
a
1.0 x 103 mol
b
2.5 x 10-2 mol
4.2 x 10-2 mol
4.0 x 10'mol
3.0 x 1024 mol
Oe

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.

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]

One nanometer is equal to how many meters?