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
Answer
The arm and base of microscope are connected with each other with help of inclination joint. which provide easiness to user during research analysis or other microscopic studies.
It has significant role in light and compound microscope that need light for visualization of examine sample. It also help in easy rotation during focusing toward light for better contrast.
Answer:
plasma, red blood cells, white blood cells, and platelets
Explanation:
PLASMA: The main role of plasma is to take nutrients, hormones, and proteins to the parts of the body that need it.
RBC: The main job of red blood cells, is to carry oxygen from the lungs to the body tissues and carbon dioxide as a waste product, away from the tissues and back to the lungs.
WHITE BLOOD CELLS:They flow through your bloodstream to fight viruses, bacteria, and other foreign invaders that threaten your health.
PLATELETS: a component of blood whose function is to react to bleeding from blood vessel injury by clumping, thereby initiating a blood clot.
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Answer:
A rose grower should use<u> Muriate of potash, Potassium sulfate, Potassium nitrate, Sulfate potash magnesia, Kainite</u> etc.
