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Kobotan [32]
3 years ago
15

What is it called when an element has 2 little numbers on top of each other on the left of the element?

Chemistry
1 answer:
Maru [420]3 years ago
5 0
_{n}^{m} A \\ \\ If\ we\ have\ an\ element\ A,\ then\ n\  is\ an\ atomic\ number, \\ \\ and\ m \ is\ a\ mass\ number.

Atomic number shows the number of protons, and charge of the nucleus.
Mass number shows sum of the number proton and neurons in the nucleus.
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What are some problems chemist must consider when developing new technologies?
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3 0
4 years ago
From the graph of Density vs. Concentration, created in Graph 1, what was the relationship between the concentration of the suga
USPshnik [31]

The graph is not given in the question, so, the required graph is attached below:

Answer:

According to the graph, the relationship between the density of the sugar solution and the concentration of the sugar solution is directly proportional to each other as they both are increasing exponentially.

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8 0
3 years ago
11.0 L of hydrogen and 5.52 L of oxygen are exploded together in a reaction tube. What volume of water vapor was formed, at STP?
Marysya12 [62]

Answer:

11.0 L

Explanation:

The equation for this reaction is given as;

2H2  +  O2  -->  2H2O

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At STP;

1 mol = 22.4 L

This means;

44.8 L of H2 reacts with 22.4 L of O2 to form 44.8 L of H2O

In this reaction, the limiting reactant is H2 as O2 is in excess.

The relationship between H2 and H2O;

44.8 L = 44.8 L

11.0 L would produce x

Solving for x;

x = 11 * 44.8 / 44.8

x = 11.0 L

4 0
3 years ago
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If the pH changes from 5 to 6, the H+ would concentration would?
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