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suter [353]
3 years ago
6

What is the definition of an independent and dependent variable?

Chemistry
1 answer:
sladkih [1.3K]3 years ago
3 0

Answer:

The Independent variable is the variable which does not rely of the other variables. It stays the same.

The Dependent variable is the variable that is measured or changed.

Explanation:

The Independent variable is usually the x value of a table or graph

the Dependent variable is usually the y value of a table or graph

I hope this helps!

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a 10.99g sample of NaBr contains 22.34% Na by mass. Considering the law of constant composition (define proportions), how many g
leonid [27]

Given :

A 10.99 g sample of NaBr contains 22.34% Na by mass.

To Find :

How many grams of sodium does a 9.77g sample of sodium bromine contain.

Solution :

By law of constant composition , in any given chemical compound, the elements always combine in the same proportion with each other.

Therefore , percentage of Na by mass in NaBr will be same for every amount .

Percentage of Na in 9.77 g NaBr is 22.34 % too .

Gram of Na = 9.77\times \dfrac{22.34}{100}=2.18\ g .

Hence , this is the required solution .

7 0
3 years ago
The part of the ocean floor that separates the oceanic rise from the thick continental crust and is between the shoreline and th
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Among the alkaline earth metals in Group 2A/A, which is more reactive - beryllium (element 4) or strontium (element 38)?
umka2103 [35]

Answer:

Group 2A (or IIA) of the periodic table are the alkaline earth metals: beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra). They are harder and less reactive than the alkali metals of Group 1A.

Explanation:

5 0
3 years ago
If an element has 9 electrons, how many of them will be in the 2nd energy level?
faust18 [17]
Your answer would come out to 18 electrons 
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How many atoms of Hydrogen in the products of the following equation?
love history [14]

Answer:

2 atoms of H in the products side

Explanation:

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In reactant side: 3 N, 7 O (6 from the dioxide + 1 from water) and 2 H

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