Answer;
A. Bias
If the personal opinion of a scientist affects the way that the experimental results are reported, that is called bias.
Explanation;
-An experimenter bias, is a process where the scientists performing the research influence the results, in order to portray a certain outcome.
-Bias is among the factors that makes a qualitative research much more dependent upon experience and judgment than quantitative research.
-Bias in a research may arise from experimental errors and failure to consider all the possible variables and also when the researchers select the subjects that are more likely to generate the desired results.
Democritus's ideas about atoms were limited in that he claimed they were indivisible and indestructible, lacked experimental evidence, and didn't account for chemical behavior or atomic bonding.
Democritus, an Ancient Greek philosopher, made significant strides in atomic theory. However, his ideas had several limitations. Firstly, he believed that atoms were indivisible and indestructible, which we now know is incorrect, with subatomic particles like protons, neutrons, and electrons forming atoms. Secondly, Democritus had no experimental evidence to support his ideas, they were purely philosophical. Lastly, his theory did not account for chemical behavior or the bonding of atoms, concepts that are now fundamental to our understanding of chemistry.
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Increasing the rate of the reverse reaction will cause a shift to the left.
Decreasing the rate of the forward reaction will cause a shift to the left.
Decreasing the rate of the reverse reaction will cause a shift to the right.
Answer: Option (2) is the correct answer.
Explanation:
According to LeChatelier principle, any change in the equilibrium of a chemical reaction will result in shifting of equilibrium which is opposing the change.
Therefore, when we increase the rate of the reverse reaction that is, we move towards left side then this will actually cause a shift to the right hand side which is opposing the change.
Thus, we can conclude that increasing the rate of the reverse reaction will cause a shift to the left is not a result when a change to an equilibrium system is applied.
a. How many grams of Na20 are produced when 57.5 g of Na
reacts ?
b. If you have 18.0 g of Na, how many grams of O2 are
required for reaction?
c. How many grams of O2 are needed in a reaction that
produces 75.0 g of Na2O?
Answer:
Explanation:
a )
4Na(s) + O₂(g) - - 2Na₂O(s)
4 x 23g 32g 2x62
92 g of Na produces 124 g of Na₂O(s)
57.5 g of Na produces (124 / 92) x 57.5
= 77.5 g of Na₂O(s)
b )
92 g of Na requires 32 g of O₂
18 g of Na requires ( 32 / 92 ) x 18
= 6.26 g of O₂
c )
128 g of Na₂O(s) requires 32 g of O₂
75 g of Na₂O(s) requires ( 32 / 128 ) x 75
= 18.75 g of O₂