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Genrish500 [490]
3 years ago
11

What type of chemical reaction is the following reaction: Zn + 2HCI --> ZnCl2 + H2?

Chemistry
1 answer:
kondaur [170]3 years ago
5 0
The answer is a single replacement.

Explanation:
In this problem Zinc is a solid at room temperature and it is being combined with a hydrochloric acid solution to make Zinc chloride. In a single replacement reaction there will always be one compound and one single element in the product in this case the single element is hydrogen gas and the compound which has already been balanced correctly.
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An iron has a net charge of 3+. If this job has 8 protons, how many electrons does it have
kati45 [8]

Answer:

5 electrons

Explanation:

When an atom loses are gain the electrons ions are formed.

There are two types of ions.

Anion

Cation

1 = Anion

It is formed when an atom gain the electrons. when atom gain electron negative charge is created on atom. For example.

X + e⁻ → X⁻

2= Cation

It is formed when an atom loses the electrons. when atom lose electron positive charge is created on atom. For example.

X → X⁺ + e⁻

When an atom loses three electrons +3 charge is created. If this atom have 8 protons it means there were 8 electrons too. When it lost three electrons then remaining number of electrons are 5.

X → X³⁺ + 3e⁻

4 0
3 years ago
Formula for water what does the lack of a subscript after those O indicate
photoshop1234 [79]
It indicates that there is only one oxygen molecule
3 0
3 years ago
Arrange the following elements in order from least to greatest electronegativity:<br> Ca, F, Ne, Fe?
Burka [1]

Answer:

The electronegativity from order of least to highest is:

Ne, Ca, Fe, F

Explanation:

Elements in the periodic table have been arranged based on their level of electronegativity (which is the ability of an atom to attract electrons).

According to Paulings scale of rating elements based on their electronegativity, the electronegativity value of Fe, Ca, Ne, and F are 1.83, 1, 0 and 3.98 respectively.

Hence, based on Pauling scale, the order of electronegativity from least to highest is:

Ne > Ca > Fe > F

6 0
3 years ago
A sample of hydrogen gas is found to be 8.50 L at a temperature of 38.0 C and a pressure of 725mm Hg. Find the volume at STP.
Vsevolod [243]
Temp must be Kelvin
38 C = <span> <span> <span> 311.15 </span> </span> </span> K
Volume at STP = 8.50 liters * (273.15 / 311.15) * (725 / 760) =
<span> <span> <span> 7.1182746306 </span> </span> </span> Liters

The formula to use is:

Volume at STP = Present Volume * (273.15 / Present Temp °K) * (Present Pressure (Torr) / 760)

6 0
3 years ago
250 meters in 110 seconds what is the average speed in m/s
Dmitry [639]

Answer:

272 m/s

Explanation:

The boy jogs= 250 m

time he takes 110 seconds

average speed = 250/110

272 m/s

8 0
3 years ago
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