Apiece of glass with a mass of 32.50 g specific heat of 0.840 j/g*°c and an initial temperature of 115 °c was dropped into a calorimeter containing 57 g of water (specific heat 4.184 j/g*°c). the final temperature of the glass and water in the calorimeter was 119.2 °c. what was the initial temperature of the water?

39.84°c
79.68°c
119.84°c
139.68°c

Agood hypothesis includes which of the following? a: prediction b: data c: uncertainty d: conclusion

What rule is used to determine how many covalent bonds an element can form? a. the number of covalent bonds is equal to six c the number of covalent bonds is equal to five minus the group number plus the group number b. the number of covalent bonds is equal to eight d. none of the above minus the group number select the best answer from the choices provided

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]