subject
Chemistry, 18.03.2022 14:00 njorda7211

(01. 05 MC) During an experiment a thermometer was placed in a beaker containing hydrogen peroxide. The following observations were recorded when yeast granules were added to hydrogen peroxide.

Observation 1: Fizzing and bubbling took place.

Observation 2: The temperature began to rise.

Based on the observation, justify the type of change (physical or chemical) that took place

ansver
Answers: 3

Another question on Chemistry

question
Chemistry, 22.06.2019 16:00
The chemical equation below shows the reaction of sodium (na) and chlorine (cl) to form sodium chloride (nacl). 2na + cl2 → 2nacl in this equation, which of the following is a reactant? i. sodium ii. chlorine iii. sodium chloride
Answers: 1
question
Chemistry, 22.06.2019 17:20
Pegmatites are igneous rocks in which the individual minerals are very large. typically, the minerals are all light-colored quartz, feldspar and muscovite. if you were given a black and white photograph of a pegmatite in a quarry (where the rock has been blasted and broken), what physical properties could you use to identify those three minerals in this hypothetical photo? describe each mineral and the specific diagnostic properties. be specific.
Answers: 2
question
Chemistry, 23.06.2019 01:00
You wish to prepare a buffer consisting of acetic acid and sodium acetate with a total acetic acetate plus acetate concentration of 250 mm and a ph of 5. what concentrations of acetic acid and sodium acetate should you use
Answers: 1
question
Chemistry, 23.06.2019 06:40
The combustion of methane, ch4, releases 890.4kj/mol. that is, when one mole of methane is burned,890.4 kj are given off to the surroundings. this meansthat the products have 890.4 kj less than the reactants.thus, ah for the reaction = - 890.4 kj. a negative symbolforah indicates an exothermic reaction.ch (g) + 20 (g)> co2 (g) + 2 h0 (1); ah = - 890.4 kga) how much energy is given off when 2.00 mol of ch,are burned? b) how much energy is released when 22.4g of ch. areburned?
Answers: 1
You know the right answer?
(01. 05 MC) During an experiment a thermometer was placed in a beaker containing hydrogen peroxide...
Questions
question
Mathematics, 20.09.2020 08:01
question
History, 20.09.2020 08:01
question
Mathematics, 20.09.2020 08:01
question
Mathematics, 20.09.2020 08:01
Questions on the website: 13722361