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3 years ago

6

The density of mercury is 13.5 g/ml and the density of water is 1.00 g/ml. if a mercury barometer reads 709 mmhg, what is the ba

rometric pressure in cmh2o?

1 answer:

lesya [120]3 years ago

3 0

Go to the chem text book

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When a particular gas is mixed with two molecules in solution, a reaction occurs. Which of the following equations correctly mod

Bond [772]

Answer:

B.

Explanation:

- Make a list of the elements with amount in each

- Multiply them out to get them equivalent

- Hope that helped! Please let me know if you need further explanation.

7 0

4 years ago

The human body requires a pH. The clinical condition in which the blood pH is below is called acidosis. The clinical condition i

bazaltina [42]

Answer:

An aqueous solution in the blood that helps to regulate pH is called buffer solution.

Explanation:

Buffer solution is a specific type of solution which able to resist the pH change when small amount of acid or base is added to it.There are various buffer system present inside our body that helps to regulate the pH of our body.

The clinical contidition in which the blood pH is above is 7.45 is called alkalosis it can be overcome by addition of required amount of acid or H+ ion to neutralize to excess base.

For example during alkalosis the CO2 that is produced during cellular respiration reacts with water to generate carbonic acid(H2CO3) which will help to neutralize the excess base to maintain the normal pH of the blood.

5 0

3 years ago

How many moles of hydrochloric acid are present in 62.2 mL of 4.54 M HCl solution

stiks02 [169]

Moles of HCl = 0.282

<h3>Further explanation</h3>

Molarity shows the number of moles of solute in every 1 liter of solute or mmol in each ml of solution

$\large \boxed {\bold {M ~ = ~ \dfrac {n} {V}}}$

Where

M = Molarity

n = number of moles of solute

V = Volume of solution

The volume of HCl=62.2 ml=0.0622 L

The molarity of HCl = 4.54 M

Then moles of HCl :

$\tt n=M\times V\\\\n=4.54\times 0.0622\\\\n=0.282~moles$

4 0

3 years ago

What would most accurately measure the volume of water or other liquid?

Afina-wow [57]

Answer:

D. Graduated Cylinder

Explanation:

7 0

3 years ago

Mg + 2 AgNO₃ → Mg(NO₃)₂ + 2 Ag How many grams of magnesium nitrate, Mg(NO₃)₂, are formed when 9.87 moles of silver nitrate, AgNO

Aleksandr-060686 [28]

Mass of Magnesium nitrate formed : 731.86 g

<h3>Further explanation</h3>

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.

Reaction

Mg + 2AgNO₃ → Mg(NO₃)₂ + 2 Ag

moles of silver nitrate, AgNO₃ = 9.87

mole ratio AgNO₃ : Mg(NO₃)₂ = 2 : 1, so mol Mg(NO₃)₂ :

$\tt \dfrac{1}{2}\times 9.87=4.935$

mass of Mg(NO₃)₂(MW=148,3 g/mol) :

$\tt mass=mol\times MW\\\\mass=4.935\times 148,3\\\\mass=731.86~g$

4 0

3 years ago