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HACTEHA [7]
3 years ago
9

What type of property can you observe or measure without chaning the substance

Chemistry
2 answers:
galina1969 [7]3 years ago
7 0
You can observe physical properties using your 5 senses
nexus9112 [7]3 years ago
4 0
You can observe or measure volume without changing the substance!
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Stop littering and polluting
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A lab director asks two students, Lydia and Damien, to each select a bottle of a concentrated weak base. When they reach the cab
algol13

Lydia and Damien should select the bottle of weak base with high molarity(M)

<h3>Further explanation</h3>

According to Arrhenius, Base is a compound which in water releases OH- ions

Electrolytes (acids or bases) with a small degree of ionization are classified as weak electrolytes

If two students, Lydia and Damien, select each bottle of a concentrated weak base, then a guide can be chosen to choose some of the solutions available in the lab :

  • Base compounds are usually known from their names ending in hydroxide suffixes such as NaOH, sodium hydroxide
  • The weak base will be partially ionized in water because the ionization degree is close to 0 or less than 1
  • If there is a Kb value (base ionization constant), then this shows the strength of the base. The greater the value of Kb, the greater the base strength
  • If there are some weak bases, then Lydia and Damien choose the highest concentration, usually indicated by the value of Molarity (M)

Because no choice solution is included, the weak base example is:

Ammonia (NH₃)

Aluminum hydroxide (Al (OH)₃)

Copper (II) hydroxide Cu (OH)₂

Mercury (II) hydroxide Hg (OH)₂

<h3>Learn more</h3>

the Brønsted theory

brainly.com/question/1916011

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base would not effectively deprotonate acetylene  

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Keywords : weak base, select a bottle, chemical solutions

#LearnWithBrainly

8 0
3 years ago
A 25 g substance has a temperature increase of 17’c when it absorbs 340 J of heat. What is it’s specific heat?
Irina-Kira [14]

Answer:

25 x 17 x 340

Explanation:

5 0
3 years ago
A flexible container at an initial volume of 4.11 L contains 2.51 mol of gas. More gas is then added to the container until it r
Nitella [24]

Answer:

7.81 moles

Explanation:

To solve this problem, let us generate an expression involving volume and number of mole of the gas since the pressure and temperature of the gas are constant.

From ideal gas equation:

PV = nRT

Divide both side by P

V= nRT/P

Divide both side by n

V/n = RT/P

Since RT/P are constant, then:

V1/n1 = V2/n2

Data obtained from the question include:

V1 = 4.11

n1 = 2.51 moles

V2 = 16.9L

n2 =?

Using the above equation i.e V1/n1 = V2/n2, the final number of the gas can be obtained as illustrated below:

4.11/2.51 = 16.9/n2

Cross multiply to express in linear form

4.11 x n2 = 2.51 x 16.9

Divide both side by 4.11

n2 = (2.51 x 16.9) / 4.11

n2 = 10.32moles

Now, to obtain the number of mole of the gas added, we'll subtract the initial mole from the final mole i.e

n2 — n1

Number of mole added = n2 — n1

10.32 — 2.51 = 7.81 moles

Therefore, 7.81 moles of the gas was added to the container

3 0
3 years ago
Which of the following statements about the Moon is true?
Helga [31]
D. The Moon is the Earth's largest natural satellite.

There you go!
3 0
3 years ago
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