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Ksenya-84 [330]
4 years ago
11

Help wit this chemistry question and how do you do it ?

Chemistry
1 answer:
Alex4 years ago
7 0
The number of protons and neutrons can be found on your periodic table or looked up on the internet. the number of electrons must be determined by looking at the charge and determining how many would be needed.
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In the Alkali metals what element is the same "Period" as the element Neon
Slav-nsk [51]

Answer:

Lithium

Explanation:

The answer is Lithium because the Alkali metals family is in the group 1A and the element neon is in the second period. If you look at the periodic table group 1A and the second period connects at the element Lithium.

7 0
4 years ago
How can the speed of solvent molecules be slowed down? A. By increasing the temperature B. By increasing the surface area of the
SVEN [57.7K]

Answer:

Explanation:

If by speed ,you mean the rate at which they collide with each other then yes the answer would be

By decreasing the temperature

Since we already know thattemperature is the average kinetic energy of the molecules and increasing temperature will increase the motion of the solvent molecules and an decrease in temperature will decrease in the motion of solvent molecules

3 0
4 years ago
A student mixes a 10.0 ml sample of 1.0 m naoh(aq) with a 10.0 ml sample of 1.0 m hcl(aq) in a polystyrene container. the temper
AleksAgata [21]
Hrxn = Q reaction / mol of reaction
mol of reaction = M * V = 10 * 1 = 10 mmol = 0.01 mol
Q water = m * C * (Tf - Ti)
             = (10 + 10) (4.184) (26-20) = 502.08 J
Q reaction = - Q water = -502.08 J
Hrxn = -502.08 / (0.01) = - 50208 J = - 50.21 kJ/mol
5 0
3 years ago
Potassium carbonate dissolved in water
rusak2 [61]
Potassium carbonate<span> (K</span>2CO3<span>) is a white salt, </span>soluble in water<span> (</span>insoluble<span> in ethanol) which forms a strongly alkaline solution. </span>
8 0
3 years ago
Pls help! Due today.
iragen [17]

Answer:

Explanation:

% yields =  <u>experimental yields</u> / theoretical yields )x 100%

              =( 302 ÷ 320 )x 100% = 94.4 %

% error = 100% - 94.37% 5.64%

or u can use this law :

% error =(theoretical  value - experimental value )/ theoretical value) x 100%

              ( 320 - 302 )/ 320 ) x 100% = 5.64%

8 0
3 years ago
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