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Korolek [52]
2 years ago
15

How does the immune system uses feedback mechanisms?

Chemistry
1 answer:
Marianna [84]2 years ago
4 0

Answer:The main job of the innate immune system is to fight harmful substances and germs that enter the body, for instance through the skin or digestive system. The adaptive (specific) immune system makes antibodies and uses them to specifically fight certain germs that the body has previously come into contact with.

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If a 67.3G rock is dissolved in 2.00L of acid, what is the molar concentration of gold in the acid solution
brilliants [131]

Answer:

[Au] = 0.171 M

Explanation:

For this question, we assume the rock is 100 % gold.

First of all, we determine the moles of gold

67.3 g . 1mol/ 196.97g = 0.342 moles

Molar concentration is defined as the moles of solute, contained in 1L of solution.

Our solution volume is 2L.

M = 0.342 mol / 2L = 0.171

Molar concentration, also called molarity of solution is the most typical unit of concentration.

6 0
2 years ago
How do you determine the proper number of significant figures of a liquid using a graduated cylinder
Aleksandr [31]
You determine the correct number of significant figure of a measurement in a graduated cylinder by looking at the smallest division on the graduated cylinder. If the division is divided up to the ones place, you can still read the half of that division or the .50 measurement. So, you can have until the tenths place in your measurement.
4 0
3 years ago
Can someone please help me and don’t answer if you don’t know the answer please<br> thank you :)
o-na [289]
Combustion means the burning of something. So in the given question, you could say, “In this question, combustion means the burning of methane”.
8 0
3 years ago
You go to the same school as me BAHAHHAHA
Reptile [31]
Oh my i really hope no one from my school sees my comments
4 0
3 years ago
How many particles are in chemicals
stepan [7]

Answer:

6.022 x 10^23 particles

Explanation:

Chemists have chosen to count atoms and molecules using a unit called the mole (mol), from the Latin moles, meaning “pile” or “heap.”

One mole is 6.022 x 10^23 of the microscopic particles which make up the substance in question.

Hope this helped! :^)

4 0
2 years ago
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