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allsm [11]
3 years ago
6

What particle decay is this? 210 83 Bi→210 84 Po ​

Chemistry
1 answer:
sesenic [268]3 years ago
3 0

Answer:

Beta emission

Explanation:

In beta emission, a neutron is converted into a proton thereby emitting an electron and a neutrino. A neutrino is a particle that serves to balance the spins.

When a nucleus undergoes beta emission, the mass number of the parent and daughter nuclei remain the same while the atomic number of the daughter nucleus is greater than that of its parent by one unit.

Hence, in beta emission, the daughter nucleus is found one pace to the right of the parent in the periodic table.

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How many grams of HCl(aq) are required to react completely with 1.25g of Zn(s) to form ZnCl2(aq) and H2
faltersainse [42]

1.39 g HCl

Explanation:

The balanced chemical equation for this reaction is given by

Zn(<em>s</em>) + 2HCl(<em>aq</em>) ---> ZnCl2(<em>aq</em>) + H2(<em>g</em>)

Convert the # of grams of Zn to moles:

1.25 g Zn × (1 mol Zn/65.38 g Zn) = 0.0191 mol Zn

Use the molar ratio to find the # of moles of HCl needed to react completely with the given amount of Zn:

0.0191 mol Zn × (2 mol HCl/1 mol Zn) = 0.0382 mol HCl

Convert this amount to grams:

0.0382 mol HCl × (36.458 g HCl/1 mol HCl) = 1.39 g HCl

8 0
2 years ago
Answer what you can please. The most accurate will get brainliest. High rating and Many thanks.
Elina [12.6K]

The correct answer for #8 is:

C.  The original pattern of the light is distorted.

3 0
3 years ago
In general, a catalyst speeds up a given reaction by providing an alternative mechanism that has a ______ activation energy, thu
prisoha [69]

Answer:

lower; increasing

Explanation:

hope this helps :)

5 0
2 years ago
Which solution is the most concentrated
san4es73 [151]

Answer:

The most concentrated solution is the one with the highest molarity. Molarity is calculated by taking the moles of solute/ liters of solution. The already gave you the molarity, so you do not need to calculate it. The most concentrated solution is the 0.25 M KCl.

Hope this helps!

5 0
3 years ago
Old aspirin exposed to moisture often smells like acetic acid (vinegar). When aspirin is heated in boiling water, it decomposes
Anit [1.1K]

Explanation:

Vinegar like smell is given off by aspirin when we tend to heat it in boiling water. The main cause of this vinegar like smell is due to the formation of acetic acid and a phenolic acid upon heating of aspirin.

As a result, it gives a positive test when treated with ferric chloride, that is, FeCl_{3}.

6 0
3 years ago
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