Answer:
4.7 g
Explanation:
The reaction that takes place is:
- 3CaCl₂(aq) + 2Na₃PO₄(aq) → Ca₃(PO₄)₂(s) + 6NaCl(aq)
First we <u>convert 4.8 g of CaCl₂ into moles</u>, using its <em>molar mass:</em>
- 4.8 g ÷ 110.98 g/mol = 0.0432 mol CaCl₂
Then we<u> convert CaCl₂ moles into Na₃PO₄ moles</u>, using the <em>stochiometric coefficients of the balanced reaction</em>:
- 0.0432 mol CaCl₂ *
= 0.0288 mol Na₃PO₄
Finally we <u>convert 0.0288 moles of Na₃PO₄ into grams</u>, using it<em>s molar mass</em>:
- 0.0288 mol Na₃PO₄ * 164 g/mol = 4.7 g
Answer:
<em>The correct option is A) DNA → RNA → protein</em>
Explanation:
Central Dogma can be described as the process under which the processes of transcription and translation are focused. It is the process by which particular parts of DNA or particular genes make up the specified proteins which are required.
The conversion of DNA into RNA is known as transcription. This process occurs in the nucleus. The conversion of mRNA into proteins is termed as translation. This process occurs in the ribosomes of the cytoplasm.
Answer:
Ans1) Common Shapes of Bacteria
Coccus: spherical or round
Bacillus: rod shaped
Spiral: curve, spiral, or twisted
Ans2) Bacteria are classified into five groups according to their basic shapes:
spherical (cocci),
rod (bacilli),
spiral (spirilla),
comma (vibrios) or corkscrew
(spirochaetes)
Answer:
A
Explanation:
Hot air is less dense therefore it rises. Cold air is more closely packed therefore it is more dense. Less dense things rise while more dense things sink.
Given parameters:
Heat of fusion of water = 334j/g
Mass of ice = 45g
Temperature of ice = 0.0°c
Unknown:
Amount of heat needed to melt = ?
Solution:
This is simply a phase change and a latent heat is required in this process.
To solve this problem; use the mathematical expression below;
H = mL
where m is the mass
L is the heat of fusion of water;
H = 45 x 334 = 15030J
