Answer:
7.8 moles are needed.
Explanation:
Given data:
Mass of oxygen produced = 125 g
Number of moles of mercury oxide needed = ?
Solution:
Chemical equation;
2HgO → 2Hg + O₂
Number of moles of oxygen:
Number of moles = mass/ molar mass
Number of moles = 125 g/ 32 g/mol
Number of moles = 3.9 mol
Now we will compare the moles of oxygen with mercury oxide.
O₂ : HgO
1 : 2
3.9 : 2×3.9 = 7.8 mol
At the surface, the Sun’s temperature being about 550 degrees Celsius is the error in the statement.
<h3>What is Sun?</h3>
This is defined as a type of star in which Earth and the other parts of the solar system revolve around.
It has a high temperature of around 1 million celsius on the surface which is why option C was chosen.
Read more about Sun here brainly.com/question/15837114
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The percentage range of an adult's kilocalorie that is recommended as the maximum to be from fat is between 20-35% of kcal from fat. Fats and oils are part of a healthful diet, however the type of fat makes a difference to heart health and the total amount of fat consumed is important. Fat contains about 9 kilocalorie per gram. Fats are classified as saturated, monosaturated, or polysaturated based on the type of chemical bonds in their fatty acids. The recommended fat intake is between 20 to 30 percent of calories for adults, 30 to 35 percent of calories for children 2 to 3 years and 25 to 35 percent for adolescents 4 to 18 years of age.
Is this even english it’s confusing
Antibodies are white blood cells that destroy antigens. Antitoxins are white blood cells that destroy toxins(poisons).
