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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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What is the the wavelength of light with a frequency of 230<br> Hz??
Andrews [41]
Wavelength =speed/frequency
So speed/230
You need speed to get the answer
3 0
4 years ago
4. Balance the following chemical equation. Say what the coefficients "a"
lisabon 2012 [21]

Answer:

a = 4

b = 3

Explanation:

<u>SOLUTION :-</u>

Balance it by using 'hit & trial' method , and you'll get the answer :-

2Fe₂O + 3C → <u>4</u>Fe + <u>3</u>CO₂

⇒ a = 4 ; b = 3

<u></u>

<u>VERIFICATION :-</u>

<em>In reactant side of equation :-</em>

  • Number of atoms in Fe = 2×2 = 4
  • Number of atoms in O = 2×3 = 6
  • Number of atoms in C = 3×1 = 3

<em>In product side of equation :-</em>

  • Number of atoms in Fe = 4×1 = 4
  • Number of atoms in C = 3×1 = 3
  • Number of atoms in O = 3×2 = 6

Number of atoms of each element is equal in both reactant & product side of equation. Hence , the equation is balanced.

6 0
3 years ago
Why is only 10% of energy transferred
Alex17521 [72]

Answer:

the rest is lost largely through metabolic processes as heat.

Explanation:

The amount of energy at each trophic level decreases as it moves through an ecosystem. As little as 10 percent of the energy at any trophic level is transferred to the next level;

6 0
3 years ago
Every single-celled organism is able to survive because it carries out *
deff fn [24]

Answer:

Every single celled organism is able to survive because it carries out metabolic activities.

Metabolic activity is a set of chemical reactions which are needed for an organism to maintain it's life

Explanation:

the various types of metabolic processes keep an organism alive. There are various types of metabolic processes that takes place in the body of living organism.

These are cellular respiration, reproduction, excretion, digestion et cetera. Every living cell has these processes going on in their body to keep them alive.

Living organism need energy to carry out these processes which they get by eating food.

Read more on Brainly.com - brainly.com/question/12186942#readmore

6 0
3 years ago
Which pH change represents a hundredfold increase in the concentration of H3O+?
goldenfox [79]
The answer is (3) pH 3 to pH 1. The pH is related to the concentration of H3O+ with the relationship: pH = -lg c(H+). So when concentration of H3O+ increase, the pH will decrease. And decrease 2 when when increase hundredfold. Because 100=10^2.
5 0
3 years ago
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