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pishuonlain [190]
2 years ago
6

Which of the following is controlled by the nervous system

Chemistry
1 answer:
uranmaximum [27]2 years ago
5 0

Your whole body. All of your actions are carried out due to the nervous system.

Hope it helps! :)

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Your brain and spinal cord are joined to the other parts of your body through __________.
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Answer is A

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Fish need about 5 ppm oxygen dissolved in water to survive. Will water with 5 mg oxygen per
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5mg in liter is 5 ppm

Explanation: 1 ppm is one part per million.

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If two forces are heading in the same direction, we ______ them to calculate net force.
steposvetlana [31]

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2 years ago
A chemical reaction produces 3.81g potassium chloride (KCl). How many formula units of potassium chloride are there? *Find Molar
Aleks04 [339]

Answer:

The number of formula units in 3.81 g of potassium chloride (KCl) is approximately 3.08 × 10²²

Explanation:

The given parameters is as follows;

The mass of potassium chloride produced in the chemical reaction (KCl) = 3.81 g

The required information = The number of formula units of potassium chloride (KCl)

The Molar Mass of KCl = 74.5513 g/mol

The \ number \ of \ moles \ of \ a \ substance, n = \dfrac{The  \  mass  \  of  \  the substance}{The   \  Molar  \   Mass   \  of  \   the   \  substance}

Therefore, we have;

The \ number \ of \ moles \ of \ KCl= \dfrac{3.81 \ g}{74.5513 \ g/mol} \approx 0.051106 \ moles

1 mole of a substance, contains Avogadro's number (6.022 × 10²³) of  formula units

Therefore;

0.051106 moles of KCl contains 0.051106 × 6.022 × 10²³  ≈ 3.077588 × 10²² formula units

From which we have, the number of formula units in 3.81 g of potassium chloride (KCl) ≈ 3.08 × 10²² formula units.

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