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3 years ago

How do white blood cells fight pathogens?

2 answers:

5 0

White blood cells work in two ways; they can ingest or engulf pathogens and destroy them by digesting them. White blood cells can also produce antibodies to destroy particular pathogens by clumping them together and destroying them. They also produce antitoxins that counteract the toxins released by pathogens.

trapecia [35]3 years ago

3 0

Answer:

Explanation:white blood cells pathogens in two ways

1-By ingesting them and digesting them

2-The other way is that they produce antibodies .so when antibodies are produced pathogens are killed.

In this way WBC fight with pathogens

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Hydrogen and oxygen react chemically to form water how much water would form if 14.8grams of hydrogen reacted with 34.8 grams of

pishuonlain [190]

Answer:

There will be formed 39.1935 grams H2O formed

Explanation:

Step 1: The balanced equation

2H2 + 02 → 2H20

Step 2: Given data

mass of hydrogen = 14.8 grams

Molar mass of hydrogen = 2.02 g/mole

mass of oxygen = 34.8 grams

Molar mass of oxygen = 32 g/mole

Step 3: Calculate moles

moles = mass / Molar mass

moles of hydrogen = 14.8g/ 2.02 g/mole = 7.33 moles

moles of oxygen = 34.8g / 32g/mole = 1.0875 moles

For 2 moles hydrogen consumed, we need 1 mole of oxygen.

This means oxygen is the limiting reagens and will be consumed completely. Hydrogen is the reactant in excess, there will remain 5.155 moles of hydrogen

Step 4: Calculate moles of H2O

We see that for 2 moles of H2 consumed, there is needed 1 mole of O2, to produce 2 moles of H2O.

For 1.0875 moles of oxygen consumed, there will be produced 2.175 moles of H2O

Step 5: Calculate mass of water

Mass of H2O = moles of H2O * Molar mass of H2O

Mass of H2O = 2.175 moles * 18.02 g/moles 39.1935 grams

There will be formed 39.1935 grams H2O formed

4 0

3 years ago

How many eight-packs of water would you need if 32 people

bonufazy [111]

Answer:

You would need 8 eight packs of water

Explanation:

32 x 2 (seeing as this is the amount of water each person consumes)

= 64 divided by 8 (the amount of water in each pack)

= 8 eight packs of water

5 0

3 years ago

Which of the following does NOT indicate that a chemical change may have taken place?

labwork [276]

The following does NOT indicate that a chemical change may have taken place is fracture formation. A chemical change happens when the substance changes its physical state and composition resulting from a chemical reaction. This chemical reaction may either give off or absorb energy. A change in color is a chemical change. For example, litmus paper turns to red when placed in an acid solution. Production of gas is a chemical change. For example, adding hydrochloric acid to the tiles of the bathroom gives a hissing sound with gases given off. Formation of a precipitate is also a chemical change. Change in shape is not a chemical change.

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3 years ago

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What type(s) of bond(s) does carbon have a tendency to form?

Naily [24]

Carbon has a tendency to form covalent bonds.

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3 years ago

What is force and motion

Elza [17]

Force is a strength or energy as an attribute or physical action or movement, motion is the action or process of moving or being moved

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3 years ago

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