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3 years ago

Why are chemical sanitizers ineffective in killing microbes present in cracks and crevices?

1 answer:

6 0

Microbes are so small that they are able to "hide" in the cracks and crevices in your hand even with the help of sanitizer it only kills 99% not 100% so font dump that soap yet because you'll be wanting to kill that 1% that is causing you disease and fermintation

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Which of the following is the best description of a Chemical equation?

JulsSmile [24]

- A chemical reaction is considered as a process of transformation of chemical reactants into products.

- Chemical reactions involve change in position of electrons or breaking the bonds between atoms to form new molecules. (no change in the elements present).

- Chemical reactions are best described by chemical equations

So the correct answer is B

7 0

3 years ago

Read 2 more answers

The Great Plains are also referred to as____.

Gnesinka [82]

Answer:

The interior plains

5 0

3 years ago

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How many grams of CuSO4 • 5H2O do you need to make 0.8 L of a 0.6 M solution

Bumek [7]

<h3>Understanding the concept:-</h3>

Here the concept of Molarity used .We will put the formula of Molarity then we find moles of copper sulphate .Then we can find the.Given weight of Copper sulphate.So let's do

<h3>Solution:-</h3>

Volume of Solvent=0.8L
Molarity=0.6M

We know

$\boxed{\sf Molarity=\dfrac{Moles\:of\: solute}{Volume\:of\: Solvent \:in\;L}}$

$\\ \rm\longmapsto Moles\:of\: solute=Molarity\times Volume\:of\: Solvent\:in\:L$

$\\ \rm\longmapsto Moles\:of\: Solute=0.8(0.6)$

$\\ \rm\longmapsto Moles\:of\: Solute=0.48mol$

Now

Molar Mass of Solute:-

$\\ \rm\longmapsto CuSO_4.5H_2O$

$\\ \rm\longmapsto 65u+32u+4(16u)+5(2\times 1u+16u)$

$\\ \rm\longmapsto 96u+64u+5(2+16)$

$\\ \rm\longmapsto 160u+90u$

$\\ \rm\longmapsto 250u$

$\\ \rm\longmapsto 250g/mol$

Now

$\boxed{\sf No\:of\:moles=\dfrac{Given\:Mass}{Molar\:Mass}}$

$\\ \rm\longmapsto Given\:Mass=No\:of\:Moles\times Molar\:Mass$

$\\ \rm\longmapsto Given\:Mass=250(0.48)$

$\\ \rm\longmapsto Given\:Mass=120g$

8 0

3 years ago

Explain how the temperature of a substance is related to the kinetic energy of its molecules.

natima [27]

At the atomic scale, the kinetic energy of atoms and molecules is sometimes referred to as heat energy. Kinetic energy is also related to the concept of temperature. Temperature is defined as the measure of the average speed of atoms and molecules. The higher the temperature, the faster these particles of matter move.

7 0

3 years ago

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What material was added to powdered rock during tuttle and bowen's experiments?

Rzqust [24]

Answer:

water was added to powdered rock

Explanation:

4 0

3 years ago