Chemistry, 19.07.2019 22:00 genyjoannerubiera
Read the following passage: the movement of tectonic plates buries a rock deep inside earth. intense heat and pressure change the mineral composition of the rock and transform it into rock a. rock a melts and comes out to the surface of earth during a volcanic eruption. the molten rock cools rapidly to form rock b. which statement is most likely correct? rock b may have fossils. rock a may have shiny, glassy surface. rock a is composed of layers of sediments. rock b has a fine grainy texture and small crystals.
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, 23.06.2019 07:10
Which one of the following is an oxidation-reduction reaction? naoh + hno3 --> h2o + kno3 naoh + hno3 --> h2o + kno3 so3 + h2o --> h2so4 cacl2 + na2co3 --> caco3 + 2 nacl ch4 + 2 o2 --> co2 + 2 h2o al2(so4)3 + 6 koh --> 2 al(oh)3 + 3 k2so4
Answers: 3
Chemistry, 23.06.2019 16:00
Aconversion factor is a ratio of equivalent values used to express the same units in different quantities
Answers: 3
Read the following passage: the movement of tectonic plates buries a rock deep inside earth. intens...
English, 11.01.2021 09:00
Mathematics, 11.01.2021 09:00
Chemistry, 11.01.2021 09:00
Mathematics, 11.01.2021 09:00
History, 11.01.2021 09:00
Advanced Placement (AP), 11.01.2021 09:00
English, 11.01.2021 09:00
Mathematics, 11.01.2021 09:00