Answer:
When water is added to a graduated cylinder, having a surface where the sides of the water look higher than the center means that the curved surface is a concave meniscus which has formed because of surface tension (Choice C).
Explanation:
A meniscus is simply the curvature that the surface of a liquid acquires when it is in a container, such as a graduated cylinder. It is concave when there is attraction between molecules -water and glass- or it can be convex when both surfaces are repelled.
<u>Water is a polar molecule</u>, with the capacity to adhere to the surfaces it comes into contact with. This characteristic causes it to form a concave meniscus, as the outermost molecules adhere to the glass surface, while the surface tension of the water attracts the molecules from the centre downwards, causing the concavity.
Learn more:
Measuring with a graduated cylinder brainly.com/question/4070509
Answer:
1) A chemical reaction is shown.
SnO2 + H2 → Sn + H2O
What is true about this chemical reaction?
B.
It is unbalanced because the mass of the reactants (number of atoms) is greater than the mass of the products (number of atoms).
2) Read the information about an experiment.
Jadon plans on carrying out an experiment involving the burning of steel wool to illustrate the conservation of mass. Steel wool is made of iron. When it is burned it combines with oxygen to form iron(III) oxide.
Which step in his experiment is the most important if he wants his experiment to correctly demonstrate the conservation of mass?
A.
The steel wool should be burned inside of a sealed jar or other closed system.
Explanation:
The explanation to number 1 is that I selected it in my test and got it.
The explanation the number 2 is from the link below:
https://quizizz.com/admin/quiz/5dee60258f1145001bc02ed5/physical-science-2nd-9-weeks-practice-test-2020
This is an overview of translation process.
Translation is the process in protein synthesis in which the genetic information encoded in mRNA is translated into sequence of amino acid in polypeptide chain.
Ribosomes bind to mRNA in the cytoplasm and move along the molecule in a 5 prime to 3 prime directon until it reaches a start codon i.e AUG. Anticodons on tRNA molecules align opposite appropriate codons according to complementary base pairing (e.g. AUG = UAC). Each tRNA molecule carries a specific amino acid (according to the genetic code)
. Ribosomes catalyse the formation of peptide bonds between adjacent amino acids (via condensation reactions)
. The ribosome moves along the mRNA molecule synthesising a polypeptide chain until it reaches a stop codon
. At this point translation ceases and the polypeptide chain is released
Answer:
Carbon monoxide consists of one oxygen and one carbon atom that’s why carbon monoxide is not an atom.
Explanation:
