Describe three skills people use to conduct scientific investigations
1 answer:
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Answer:
a)
b)
Explanation:
From the question we are told that:
initial Concentration
Final Concentration
Final volume needs
Generally the equation for Volume is mathematically given by
Therefore
The volume of buffer needed is
Answer : The answer is,
Explanation :
Scientific notation : It is defined as the way or representation of expressing the number that are too big or too small that is written in the decimal form. That means always written in the power of 10 form.
For example : 8000 is written as, in this notation, the significant figure is, 1 but
in this notation, the significant figures are, 2
The given problem are :
According to the divide and multiplication rules of scientific figures, the final answer is only as precise as the value with the least number of significant figures.
Hence, the answer is,
To balance a chemical equation we need to make sure that the number of atoms of each element before and after the reaction occurs is the same.
In this case, we're asked to balance the equation:
As you can see, to balance Hydrogen we could multiply the coefficient of the products where Hydrogen is, by 2. Then, counting again:
Finally, we need to balance oxygen. For this, we could multiply the coefficient of O2 by 2 so we can have the same number of Oxygen atoms before and after the reaction occurs. Therefore, the balanced reaction is:
And, the coefficients when the equation is balanced, are:
__1_ CH4 + _2__ O2 = __1_ CO2 + __2_ H2O.
So, the correct answer is 1,2,1,2.
