A. Immune system
It helps our bodies fight everything that comes in our path.
glucose is been oxidised to produce pyruvic acid and oxygen
German roaches have flat bodies with six legs, two antennae projecting from their heads, and flat bodies, just like their American cousins and other cockroach species. Contrarily, American cockroaches are typically reddish-brown in appearance and develop to a length and width of around an inch and a half.
<h3>What is Cockroach?</h3>
Cockroaches are an insect paraphyletic category that includes all Blattodea members with the exception of termites. Only about 30 of the 4,600 cockroach species have any connection to habitations by people. Some species are infamous for developing pest problems.
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Answer:
C. When running that is the answer
The mass (in grams) of NaCl required to prepare the solution is 36.27 g
<h3>What is molarity?</h3>
Molarity is defined as the mole of solute per unit litre of solution. Mathematically, it can be expressed as:
Molarity = mole / Volume
<h3>How to determine the mole of NaCl</h3>
- Volume = 200 mL = 200 / 1000 = 0.2 L
- Molarity = 3.1 M
- Mole of NaCl =?
The mole of NaCl in the solution can be obtained as follow:
Molarity = mole / Volume
Cross multiply
Mole = Molarity x Volume
Mole of NaCl = 3.1 × 0.2
Mole of NaCl = 0.62 mole
<h3>How to determine the mass of NaCl </h3>
We can obtain the mass of NaCl needed to prepare the solution as follow:
- Molar mass of NaCl = 58.5 g/mol
- Mole of NaCl = 0.62 mole
- Mass of NaCl = ?
Mole = mass / molar mass
Cross multiply
Mass = mole × molar mass
Mass of NaCl = 0.62 × 58.5
Mass of NaCl = 36.27 g
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