All categories

3 years ago

Density and volume are properties of all matter. Naiomi has two graduated cylinders

Chemistry

1 answer:

Drupady [299]3 years ago

5 0

Answer:

They have the same density

Explanation:

One very accurate statement about the properties of the the water in each of the given cylinder is that their densities are the same.

Density is the mass per unit volume of a compound or substance.

Density is an intensive property of all matter. It does not depend on the amount of matter present.

So, the water density in the two cylinder will both have the same value. This is irrespective of the volume of water in the cylinder.

You might be interested in

The ears work with the brain and other body parts through a series of steps that help

o-na [289]

Answer: B: Your ears send a message through the nerves to the brain.

5 0

2 years ago

How many liters of 0.615 M NaOH will be needed to raise the pH of 0.385 L of 5.13 M sulfurous acid (H2SO3) to a pH of 6.247?

givi [52]

Answer:

Volume of NaOH required = 3.61 L

Explanation:

H2SO3 is a diprotic acid i.e. it will have two dissociation constants given as follows:

$H2SO3\leftrightarrow H^{+}+HSO3^{-}$ --------(1)

where, Ka1 = 1.5 x 10–2 or pKa1 = 1.824

$HSO3^{-}\leftrightarrow H^{+}+SO3^{2-}$ --------(2)

where, Ka2 = 1.0 x 10–7 or pKa2 = 7.000

The required pH = 6.247 which is beyond the first equivalence point but within the second equivalence point.

Step 1:

Based on equation(1), at the first eq point:

moles of H2SO3 = moles of NaOH

$i.e. \ 5.13\ moles/L*0.385L = moles\ NaOH\\therefore, \ moles\ NaOH = 1.98\ moles\\V(NaOH)\ required = \frac{1.98\ moles}{0.615\ moles/L} =3.22L$

Step 2:

For the second equivalence point setup an ICE table:

$HSO3^{-}+OH^{-}\leftrightarrow H2O+SO3^{2-}$

Initial 1.98 ? 0

Change -x -x x

Equil 1.98-x ?-x x

Here, ?-x =0 i.e. amount of OH- = x

Based on the Henderson buffer equation:

$pH = pKa2 + log\frac{[SO3]^{2-} }{[HSO3]^{-} } \\6.247 = 7.00 + log\frac{x}{(1.98-x)} \\x=0.634 moles$

Volume of NaOH required is:

$\frac{0.634\ moles}{0.615 moles/L}=0.389L$

Step 3:

Total volume of NaOH required = 3.22+0.389 =3.61 L

3 0

3 years ago

If the IMA of a machine is 4 and the effort force is 6.0 newtons, then the force exerted on the resistance by the machine is ___

uysha [10]

If the IMA of a machine is 4 and the effort force is 6.0 newtons, then the force exerted on the resistance by the machine is D-24 N

6 0

3 years ago

Read 2 more answers

In water, hydrogen bonding occurs between the hydrogen atom in one molecule and __________.

trapecia [35]

Answer: B) an oxygen atom in a different molecule.

Explanation:

Hydrogen bonding (H-bonding) is an inter molecular force having partial ionic-covalent character.

H-bonding takes place between a hydrogen atom attached with an electronegative atom such as O, N and F and an electronegative atom such as O,N and F. They are strong forces.

Example: $H_2O$ has hydrogen bonding between hydrogen of one molecule with oxygen atom bonded to hydrogen of different molecule.

Thus the correct option is hydrogen bonding occurs between the hydrogen atom in one molecule and an oxygen atom in a different molecule.

5 0

3 years ago

What is an emperical formula?

LiRa [457]

An empirical formula is the chemical formula showing the simplest ratio of elements in a compound rather than the total number of atoms.

For example the molecule 'CH2O' is the empirical formula for glucose.

7 0

4 years ago