subject
Chemistry, 04.02.2021 21:10 morenodonaldo762

ASAPPP HELPPP Oxygen in Earth's early atmosphere was first produced during the Precambrian from
A)
cyanobacteria in Earth's oceans
B)
volcanic activity along plate boundaries
C)
the absorption of sunlight by plants
D)
evaporation of ocean water

ansver
Answers: 2

Another question on Chemistry

question
Chemistry, 21.06.2019 19:40
In this synthesis reaction what products will form
Answers: 1
question
Chemistry, 22.06.2019 01:30
Reaction rate depends on how many molecules are coming into contact with each other with enough energy to react. increasing the temperature of the reactants will increase -
Answers: 3
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, 23.06.2019 01:30
What is the importance of interlocking the fingers and rubbing while washing hands? the palms are the dirtiest parts of the hands. the spaces between the fingers get washed. the backs of the hands get washed. the fingernails are the dirtiest parts of the hands
Answers: 1
You know the right answer?
ASAPPP HELPPP Oxygen in Earth's early atmosphere was first produced during the Precambrian from
Questions
question
Mathematics, 01.02.2021 02:00
question
Biology, 01.02.2021 02:00
question
Mathematics, 01.02.2021 02:00
question
Mathematics, 01.02.2021 02:00
question
Geography, 01.02.2021 02:00
Questions on the website: 13722359