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Leya [2.2K]
2 years ago
6

Cells of the immune system are able to respond to the

Chemistry
1 answer:
egoroff_w [7]2 years ago
5 0

Answer:

A) antigens present on the invaders

Explanation:

Antigens are substances (usually proteins) on the surface of cells, viruses, fungi, or bacteria. Nonliving substances such as toxins, chemicals, drugs, and foreign particles (such as a splinter) can also be antigens. The immune system recognizes and destroys, or tries to destroy, substances that contain antigens

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How many grams of NaOH are contained in 500 mL of a 0.80 M sodium hydroxide solution?
4vir4ik [10]

This is molarity: moles of solute/liters of solution. (Not molality)

1. Plug in what we know:

500 mL = 0.5 L

0.80 = moles/0.5

0.80*0.5 = moles

moles = 0.4

2. NaOH is given as 40 g/mole, so calculate the grams:

0.4 * 40 = 16 grams

answer: 16 grams

7 0
3 years ago
How much kg is equal to what g
Marizza181 [45]

Answer:

1kg= 1000 grams hope it helps

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Why do group 7 elements have higher melting and boiling points going down?
Genrish500 [490]

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Explanation:

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3 years ago
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Anestetic [448]

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Water, and metal.

Explanation:

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Which of the following is a property of a metal?
BaLLatris [955]
The correct answer is the 3rd option Ductility is a property of a metal. It is the ability of a material to deform under tensile stress.It is characterized by the ability to be stretched into wire-like form which is an ability of metals.
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