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Illusion [34]
4 years ago
13

Compared to a neon atom, a helium atom has a smaller atomic radius

Chemistry
2 answers:
Brums [2.3K]4 years ago
8 0

Answer:

True

Explanation:

Atomic radius is the distance between the central nucleus of an atom to the outermost shell (containing electrons). Generally, atomic radius increases down a group and the situation in the question is no exception. The increase down a group is because of the increase in electron shell down a group.

Helium (He) has just one electron shell while Neon (Ne) has two electron shells. The distance between the nucleus and the second electron shell of neon is higher than the distance between the nucleus and the single electron shell of helium.

tamaranim1 [39]4 years ago
3 0

Answer:

True

Explanation:

It is true

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When 4.5 mol al react with 11.5 mol hcl, what is the limiting reactant, and how many moles of h2 can be formed?
ahrayia [7]
1°/ . 2 Al + 6 HCl → 2 AlCl3 + 3 H2 

<span>k1 = n(Al) / 2 = 4,5 / 2 = 2,25 </span>
<span>k2 = n(HCl) / 6 = 11,5 / 6= 1,92 </span>

<span>k2 < k1 ==> HCl is the limiting reactant </span>

<span>6 mol of HCl ---> 2 mol of H2 </span>
<span>11,5 mol of HCl ---> 3,83 mol of H2 </span>
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3 years ago
What is the percent of O in<br> CO2?
katen-ka-za [31]

Answer:

72.7% of oxygen

Explanation:

8 0
3 years ago
Which type of radiation involves the conversion of a neutron into a proton?
romanna [79]

Answer:

B. Beta

Explanation:

Neutron -> proton = responsible by Beta particles.

3 0
2 years ago
What kind of bonds are hydrogen bonds???
34kurt

Hydrogen bonding is a special type of dipole-dipole attraction between molecules, not a covalent bond to a hydrogen atom. It results from the attractive force between a hydrogen atom covalently bonded to a very electronegative atom such as a N, O, or F atom and another very electronegative atom.

8 0
3 years ago
In a process called photosynthesis, plants use carbon dioxide and water, along with energy from sunlight, to produce sugar and o
Alex Ar [27]

24 molecules of H2O are needed by the plant to produce 4 molecules of sugar.

<h2>What is photosynthesis?</h2>

The process by which plants convert carbon dioxide, water, and sunlight into oxygen and sugar-based energy is known as photosynthesis.

<h3>The photosynthesis equation is as follows:</h3>

                   6CO2 + 6H2O + Sunlight → C6H12O6 + 6O2

The following three significant activities are involved in photosynthesis:

1. Chlorophyll absorbs light energy.

2. Water molecules are divided into hydrogen and oxygen and light energy is converted to chemical energy.

3. Carbon dioxide is converted to sugars.

         

Therefore, a plant needs four molecules of H2O and four molecules of CO2 to make one molecule of glucose or sugar, hence a plant needs 24 molecules of H2O and 24 molecules of CO2 to make four molecules of sugar.

Learn more about photosynthesis here:

brainly.com/question/19160081

#SPJ4

4 0
2 years ago
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