Answer:
Explanation:
Percentage is a concentration unit that describes the amount of a solute in 100 parts of total substance (solution).
The weight percent of a solution is given by the formula:
- % (w/w) = (mass of solute / mass of solution) × 100
Here, the red food coloring is the solute, water is the solvent, and the solution is the mixture.
You know the mass of water (50 g) and the percentage (15%), thus you can calculate the mass of red food coloring (x) in this way:
<u>1. Mass of solution</u>
- Mass of solution = mass of red food coloring + mass of water
- mass of solution = x + 50
<u>2. Percent</u>
% = x / (x + 50) × 100 = 15
<u>3. Solve for x:</u>
Round to two one significant figure, because the number 50 grams has one significant figure.
Answer:
The correct option is (D).
Explanation:
Uncertainty means lack of certainty in any calculations. It is the quantification of doubts after the calculations are done.
In this problem, we need to find the uncertainty in the measurement 0.0035 mg. There are 4 numbers after decimal. It means uncertain digit 1/10000 is the smallest scale division.
Hence, the uncertainty in the measurement 0.0035 mg is +0.0001 mg
Answer:
The answer is the Third one
Nuclear energy is harmful because it releases of harmful ionizing radiation and has been employed in the production of atomic bombs and hydrogen bombs.
Nuclear energy is beneficial in that it produces vast amount of energy for domestic and industrial purposes.
<h3>What is nuclear energy?</h3>
Nuclear energy refers to the energy which is produced as a result of the changes that occur in the nucleus of atoms of elements.
Nuclear energy produces the largest amount of energy when compared to other forms of energy sources.
Nuclear energy is produced by two types of nuclear reactions:
- Nuclear fission and Nuclear fusion
Nuclear energy is harmful in that it results in the release of harmful ionizing radiation which damages cells and tissues of living organisms.
Nuclear energy is also harmful because nuclear energy has been employed in the production of atomic bombs and hydrogen bombs.
On the other hand, nuclear energy is beneficial in that it produces vast amount of energy which can be used for domestic and industrial purposes. It also produces fewer wastes that damage the environment compared to fossil fuels.
In conclusion, nuclear energy is both beneficial and harmful.
Learn more about nuclear energy at: brainly.com/question/15214614
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It is the 4th one that is correct and balanced
