All categories

2 years ago

As I push down the plunger on a sealed syringe, the pressure begins to

Chemistry

1 answer:

zvonat [6]2 years ago

7 0

Answer:

Boyle's Law

Explanation:

This is a simple Boyle's law at work in this scenario.

Boyle's law is one of the gas law and it states that "The volume of a fixed mass of gas varies inversely as the pressure changes if temperature is constant".

This law was proposed by Robert Boyle.

In a sealed syringe, the volume of gas begins to decrease as the plunger is pressed.
Conversely, it becomes harder to press due to increasing pressure in the tube.
The pressure pushes back the more it is applied.
We can see that the higher pressure applied, the lower the volume of the gas.

This is clear cut practical of the Boyle's law.

You might be interested in

What is the ratio of [a–]/[ha] at ph 2.75? the pka of formic acid (methanoic acid, h–cooh) is 3.75?

Varvara68 [4.7K]

The dissociation of formic acid is:

$HCOOH \rightleftharpoons HCOO^{-} + H^{+}$

The acid dissociation constant of formic acid, $k_a$ is:

$k_a = \frac{[HCOO^{-}] [H^{+}]}{HCOOH}$

Rearranging the equation:

$\frac{[HCOO^{-}]}{[HCOOH]} = \frac{k_a}{[H_+]}$

pH = 2.75

$pH = -log[H^{+}]$

$[H^{+}]= 10^{-2.75} = 1.78 \times 10^{-3}$

$pk_a = 3.75$

$k_a = 10^{-3.75} = 1.78\times 10^{-4}$

Substituting the values in the equation:

$\frac{[HCOO^{-}]}{[HCOOH]} = \frac{k_a}{[H_+]}$

$\frac{[HCOO^{-}]}{[HCOOH]} = \frac{1.78\times 10^{-4}}{1.78\times 10^{-3}}$

Hence, the ratio is $\frac{1}{10}$ .

4 0

3 years ago

Why do oceanographers take measurements of the conductivity of the

bazaltina [42]

Answer:

B. Conductivity can be used to calculate the salinity of the water.

I am 100% sure this is the correct answer :)

8 0

2 years ago

Identify if you should use millimeters, centimeters, meters, or kilometers to measure each example.

ira [324]

Answer:

1. unless you live right around the block, distance from home to school should be in kilometers.

2. centimeters

3. millimeters

4. meters (the average is about 2 meters)

3 0

2 years ago

Read 2 more answers

SCIENCE HELP! 10 POINTS

Zepler [3.9K]

We are not 8n your. lass we need mor detail??

6 0

2 years ago

Part D

Basile [38]

The heat lost by copper(ii) sulfate is equal to heat absorbed by water since the total energy in the system remains constant according to the law of conservation of energy.

<h3>How can the number of moles be determined?</h3>

The number of moles of a substance is determined using the formula below:

Number of moles = mass/molar mass

Assuming the mass of copper(ii) sulfate used is Mc, number of moles of copper(ii) sulfate used is:

Moles of copper(ii) sulfate = Mc/159.60 moles

The heat absorbed by water is calculated using the formula below:

Quantity of Heat, H = mass × specific heat capacity × temperature change

mass of water =  10 g

Let temperature change be Tc

Heat absorbed by water = 10 × 4.186 × Tc = 41

86Tc

The change in internal energy, ΔU of copper(ii) sulfate, is given as:

ΔU = Q − W

where:

Q = heat absorbed by water

W = work done by or on the system

The enthalpy of the reaction is given as:

ΔH= energy released or absorbed/moles of copper (ii) sulfate

Therefore, according to the law of conservation of energy, the total energy in the system remains constant.

Learn more about internal energy change at: brainly.com/question/14126477

5 0

1 year ago