Answer:
A. move materials through the body
Explanation:
The blood circulatory system (cardiovascular system) transports materials and delivers nutrients and oxygen to all cells in the body.
To determine
the density of the metal, the formula to be used is mass divided by volume.
So in our
given, the mass is 25.5 g and the volume is 31.5 mL.
Convert the mL
to L, since the density unit that we are going to use is g/L
31.5 mL x 0.001
L / 1 mL = 0.0315 L
So compute for
the density:
<span>Density = 25.5g
/ 0.0315 L = 0.80325 g/L</span>
B. do the experiment more than once
Explanation:
To do a multiple trials of an experiment, it is best to do the experiment more than once.
Experimental trials are mere replication of the procedures in an experiment.
- Most hypothesis on which experiments are based must be repeatable.
- When experiments are repeated through several trials, their accuracy is increased.
- Multiple trials clearly makes it easy to make meaningful deductions from an experimental process.
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The statement that the friend made is not true. most of the mass of the plant is from carbon. the carbon comes from carbon dioxide which is used during photosynthesis. the left over carbon from photosynthesis is used to to help the plant gain mass. there is a process for this which is called cellular respiration
Answer:
The reaction is given as:
Explanation:
Bases are defined as those chemical substances which give hydroxide ions in their aqueous solutions.
When sodium hydroxide is added to water it gets dissociated into two ions that are sodium ions and hydroxide ions. Along with this heat energy also releases during this reaction.
The reaction is given as: