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3 years ago

What do you mean ph meaning

Chemistry

2 answers:

skelet666 [1.2K]3 years ago

8 0

I thought wrong at first

vladimir2022 [97]3 years ago

4 0

PH is a measure of hydrogen ion concentration, a measure of the acidity or alkalinity of a solution.

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A piece of an unknown metal has a volume of 19.8 ml and a mass of 210.0 grams. The density of the metal is g/mL A piece of the s

leva [86]

<u>Answer:</u> The density of the metal is 10.60 g/mL and the volume occupied by 86.0 grams is 8.11 mL

<u>Explanation:</u>

To calculate the density of unknown metal, we use the equation:

$\text{Density of substance}=\frac{\text{Mass of substance}}{\text{Volume of substance}}$ ......(1)

Volume of unknown metal = 19.8 mL

Mass of unknown metal = 210.0 g

Putting values in equation 1, we get:

$\text{Density of unknown metal}=\frac{210.0g}{19.8mL}\\\\\text{Density of unknown metal}=10.60g/mL$

The density of the metal remains the same.

Now, calculating the volume of unknown metal, using equation 1, we get:

Density of unknown metal = 11.45 /mL

Mass of unknown metal = 86.0 g

Putting values in above equation, we get:

$10.60g/mL=\frac{86.0g}{\text{Volume of unknown metal}}\\\\\text{Volume of unknown metal}=8.11mL$

Hence, the density of the metal is 10.60 g/mL and the volume occupied by 86.0 grams is 8.11 mL

5 0

3 years ago

Jenna built the electrical circuit seen here. What would happen to the electrical energy if Jenna removed one of the clips on th

otez555 [7]

Answer: Option (D) is the correct answer.

Explanation:

An electric circuit works well when all the connections are complete but if any of the connections in the circuit is loose or disconnected then it is possible that current will not flow from the circuit.

Therefore, when Jenna removed one of the clips on the battery then circuit becomes incomplete and as a result there will no flow of current.

Thus, we can conclude that the electrical energy would stop because the circuit is incomplete.

6 0

3 years ago

Which of the following are the physical properties of compounds? Select all that apply.

BlackZzzverrR [31]

A. Smell (Oder) B. Color and D I’m pretty sure because the common properties are Color, Oder, Melting point, and boiling point

8 0

3 years ago

Why do different elements make different color flames when you burn them?

Dovator [93]

When you heat an atom, some of its electrons are "excited* to higher energy levels. When an electron drops from one level to a lower energy level, it emits a quantum of energy. ... The different mix of energy differences for each atom produces different colours. Each metal gives a characteristic flame emission spectrum.

7 0

3 years ago

What is the density ρh of hot air inside the balloon? assume that this density is uniform throughout the balloon. express the de

enyata [817]

Answer 1) : The density of the hot air inside the balloon can be found out by using ideal gas equation;

PV = nRT;

As n is number of moles and in gases, number of moles along with mass per mole is equal to the density of the gas.

If the moles in the gas are more the density will be more.

here, density (ρ) = mass (m) / volume (V); substituting in the ideal gas equation we get,

ρ = mP / RT

Answer 2) ρ (hot air) = ρ (cold air) X $\frac{T_{h}}{T_{c}}$

Here according to the formula because T(hot air) >T(cold air),

So, the density of hot air greater than the density of cold air.

The relationship between the ρ (h) = ρ(c) X $\frac{T_{h}}{T_{c}}$

6 0

3 years ago

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What do you mean ph meaning​

What do you mean ph meaning