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sertanlavr [38]
2 years ago
5

One of the basic building blocks of matter, which cannot be broken down by chemical means is a(n)______ , of which there are 92

that occur naturally.
Chemistry
1 answer:
Nadusha1986 [10]2 years ago
6 0

One of the basic building blocks of matter, which cannot be broken down by chemical means is an element.

The first chemical element is hydrogen (atomic number is 1) and the last is oganesson (atomic number is 118).

Elements are scheduled in Periodic table, ordered by their atomic number.

Other example, krypton is a chemical element with symbol Kr and atomic number 36.

Krypton has 36 electron and 36. It is noble gas (group 18).

Noble gases are in group 18: helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe) and radon (Rn). They have very low chemical reactivity.

More about chemical element: brainly.com/question/28376204

#SPJ4

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A galvanic (voltaic) cell consists of an electrode composed of nickel in a 1.0 M nickel(II) ion solution and another electrode c
Andre45 [30]

<u>Answer:</u> The standard potential of the cell is 0.77 V

<u>Explanation:</u>

We know that:

E^o_{Ni^{2+}/Ni}=-0.25V\\E^o_{Cu^{+}/Cu}=0.52V

The substance having highest positive E^o reduction potential will always get reduced and will undergo reduction reaction.

The half reaction follows:

<u>Oxidation half reaction:</u> Ni(s)\rightarrow Ni^{2+}(aq)+2e^-

<u>Reduction half reaction:</u> Cu^{+}(aq)+e^-\rightarrow Cu(s)       ( × 2)

To calculate the E^o_{cell} of the reaction, we use the equation:

E^o_{cell}=E^o_{cathode}-E^o_{anode}

Substance getting oxidized always act as anode and the one getting reduced always act as cathode.

Putting values in above equation follows:

E^o_{cell}=0.52-(-0.25)=0.77V

Hence, the standard potential of the cell is 0.77 V

5 0
3 years ago
Which is a substance made up of only one kind of atom?
LUCKY_DIMON [66]
The answer is cC. Because it contain only one atom
8 0
4 years ago
Read 2 more answers
Which 20.0 g sample of metal is most likely to undergo the smallest change in temperature upon absorption of 100.0 J of heat?
lina2011 [118]

Answer:

b. aluminum

Explanation:

The specific heat capacity is defined as the amount of heat required to raise the temperature of 1g of a material in 1°C.

Thus, the sample with the higher specific heat capacity is the sample that will require more energy to increase its temperature in 1°C, suffering the smallest change in temperature.

Thus, is the aluminium with 0.900J/gK the element that is most likely to undergo the smallest change in temperature:

<h3>b. aluminum </h3>

5 0
3 years ago
I need help...
Aneli [31]

Answer:

1. Density of the rectangular prism is  <u>20 g/cm3</u>

2. A material's ability to dissolve : <u>Soubility</u>

3. <u>Intensive property</u> : A physical property that is independent of sample size.

Explanation:

Volume of Prism is calculated by :

volume = L\times W\times H

Length = 3 cm

Width = 2 cm

Height = 1 cm

volume = 3\times 2\times 1

V = 6 cm3

mass = 120 g

Density = \frac{mass}{Volume}

Density = \frac{120}{6}

Density = 20 g/cm3

2.

<u>Solubility :</u>

  • It is the chemical property of the substance.
  • It shows the ability of the solute to dissolve in the solvent at a given temperature.

3.

<u>Intensive Properties:</u>

  • These are bulk properties(Do not depend upon the amount of matter present)
  • They are independent of sample size.
  • Example : boiling point,melting point,temperature,refractive index

7 0
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inysia [295]

Answer:

47.778

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4 years ago
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