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emmainna [20.7K]
3 years ago
15

Mg has a higher effective nuclear charge than Na because

Chemistry
1 answer:
Alexus [3.1K]3 years ago
3 0

Answer:

magnesium has a greater effective nuclear charge than sodium.

Explanation:

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Calculate the number of Cl atoms that are in 1.1 x 10^-21 moles of Cl atoms.
Margarita [4]

According to Avogadro's number there are 62.53 atoms of chlorine in 1.1x 10^-21 moles of Cl atoms.

<h3>What is Avogadro's number?</h3>

Avogadro's number is defined as a proportionality factor which relates number of constituent particles with the amount of substance which is present in the sample.

According to the definitions, Avogadro's number depend on determined value of mass of one atom of those elements.It bridges the gap between macroscopic and microscopic world by relating amount of substance with number of particles.

Number of atoms can be calculated using Avogadro's number as follows: mass/molar mass×Avogadro's number or number of moles×Avogadro's number.

ON substitution in above formula number of atoms=1.1×10²¹×6.023×10²³=62.53 atoms

Thus, there are 62.53 chlorine  atoms in 1.1x 10^-21 moles of Cl atoms.

Learn more about Avogadro's number,here:

brainly.com/question/11907018

#SPJ1

6 0
1 year ago
What happens when wind sweeps up sand and throws it against a big rock?
RideAnS [48]
In deserts, wind often causes weathering by blowing sand and other material against cliffs and large rocks. This wears them down and creates more bits of sand and dust. Over time, the rock is scraped and polished away. ... When a gust of wind blows, it picks up sand and other bits of material.
4 0
3 years ago
Why can’t you ice skate on a lake when it is not frozen?
snow_lady [41]
Because you’ll fall in the water.
6 0
3 years ago
A bicycle completed the first 400.0 m of a ride in 86.8 s. What was the bicycle's average speed in kilometers per hour?
konstantin123 [22]

Answer:

16.6 km/h  

Step-by-step explanation:

Speed = distance/time

           = 400.0 m/86.8 s

           = 4.608 m/s               Convert kilometres to metres

Speed = 4.608m/s × (1 km/1000 m)

           = 0.004 608 km/s     Convert seconds to hours

Speed = 0.004 608 km/s × (3600 s/1 h)

           = 16.6 km/h

3 0
3 years ago
Please balance this. urgent
Colt1911 [192]
Mg+2HCl-->H2+MgCl2 you would it have to make it so each is equal on each side you would add a 2 on left in front of HCl because on the other side there is already 2 H and 2Cl so just put a 2 in front of HCl
7 0
4 years ago
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