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3 years ago

If a solution turns litmus paper turns red, which type of solution is it?

2 answers:

8 0

An acid
A neutral solution will not change the litmus paper colour or it will change to green
And a base would change it blue.

lukranit [14]3 years ago

6 0

Answer:

An acid solution.

Explanation:

The litmus paper is an acid-base indicator, its colors change depending on the pH of the solution. If the pH < 4.5, the litmus paper turns red, if the pH> 8.3 the litmus paper turns blue.

If the pH > 7, there is a base solution, if the pH< 7 there is an acid solution, and if the pH = 7 its a neutral solution.

So, if the litmus paper turned red, the solution has pH<4.5, and it's an acid solution.

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18,754kg of methanol which has a density of 0.788g/cm3 what is the volume

Brut [27]

Hello

V= m/p when V= volume, m, mass and p the density

then

V=18754000/0,7888

Remember that you first have to convert kg to gr, simply multiplied by 1000.

then

V= 23799492 cm3

Best regards

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4 years ago

Help please I am so lost my teacher is no help

uranmaximum [27]

Answer:

B - CALCIUM

Explanation:

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3 years ago

Suppose you work for a government office that needs to find a suitable place to bury barrels of poisonous liquid wastes. The soi

Lilit [14]

Answer:

The correct answer is clay rich soil

Explanation:

because the clay soil has high porosity than sand for example, as the porosity is inversely proportional with the grain size of the sediment . and the more porosity the soil has , the high amount of water that can be hold by it.

so the clay rich soil can hold high amount of water more than any sediment soil

also the clay rich soil has a low permeability that means it rarely pass the water which it holds through it , because the clay is impermeable rock and the ability to pass liquids through its layer is very hard

So this is the good one

6 0

3 years ago

Read 2 more answers

Click on the link to see the question, Please help!

bogdanovich [222]

Answer:

b and d hope this helped

Explanation:

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8 0

3 years ago

Which of the following non-hydrogen atom transitions does the photon have at its long wavelength?

suter [353]

Answer:

The move from Level n=3 to Level n=2 has the long wavelength.

Explanation:

First, due to the selection rules, only transitions between adjacent levels are allowed, thus, only a transition between Level n=3 to Level n=2 or Level n=5 to Level n=4 are allowed. The two first options are wrong.

Second, analyzing the transition between Level n=3 to Level n=2 and the transition between Level n=5 to Level n=4 it is necessary to think in terms of the equation of the difference of energy for these type of transitions:

Δ $E = \frac{h^{2}}{8.m.L}(n_{LUMO}^{2} -n_{HOMO}^{2} )$ (1)

The difference in energy (ΔE) is directly proportional to the quadratic difference between the 'n' levels of transition. Therefore, If the transition occurs between smaller 'n' levels the difference of energy will be smaller too.

Also, the energy (ΔE) is inversely proportional to the wavelength (λ) so a smaller energy means a larger wavelength.

ΔE = c / λ (2)

Hence, the move from Level n=3 to Level n=2 has a long wavelength.

In order to calculate this wavelength is necessary to replace the data on equation (1) and (2).

6 0

3 years ago