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Helga [31]
3 years ago
12

3. What do we call atoms of the same elements with different mass numbers?

Chemistry
1 answer:
Talja [164]3 years ago
7 0

Answer:

Isotopes

Explanation:

We call atoms of the same elements with different mass numbers isotopes.

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How many grams<br>are in 3.0 moles of KCI<br>(potassium chloride)?​
Ganezh [65]

Answer: I thinc 223.6539

Explanation:

7 0
3 years ago
If a 2.75 L gas sample is held at a constant temperature, and its pressure is changed from 750.0 torr to 360.0 torr, what will t
liubo4ka [24]

Answer:

5.73 Liters

Explanation:

Pressure decreases => Volume increases (Boyles Law)

V(final) = 2.75L (750Torr/360Torr) = 5.73 Liters

5 0
3 years ago
For the neutralization reaction involving hno3 and ca(oh)2, how many liters of 1. 55 m hno3 are needed to react with 45. 8 ml of
Agata [3.3K]

For the neutralization reaction involving HNO₃ and Ca(OH)₂, liters of 1.55 M HNO₃ are needed to react with 45.8 ml of a 4.66 m Ca(OH)₂ solution is 0.270 L.

<h3>What is neutralization reaction?</h3>

Those reactions in which acids and bases will combine with each other for the formation of water molecule and salt, is known as neutralization reaction.

Given chemical reaction is:

2HNO₃ + Ca(OH)₂ → 2H₂O + Ca(NO₃)₂

Moles (n) of Ca(OH)₂ will be calculated by using the below formula:
M = n/V, where

M = molarity = 4.66M

V = volume = 45.8 mL = 0.045 L

n = (4.66)(0.045) = 0.2097 mol

From the stoichiometry of the reaction,

1 mole of Ca(OH)₂ = reacts with 2 moles of HNO₃

0.2097 mole of Ca(OH)₂ = reacts with 2×0.2097=0.419 moles of HNO₃

Again by using the molarity equation volume will be calculated for HNO₃ as:

V = (0.419) / (1.55) = 0.270 L

Hence required volume of HNO₃ is 0.270 L.

To know more about neutralization reaction, visit the below link:

brainly.com/question/23008798

#SPJ4

6 0
2 years ago
The mass of a jar of sugar is 11. 9 kg. What is the total mass of 13 jars of sugar?.
Masteriza [31]

Answer:

154.7

Explanation:

11.9kg x 13 = 154.7

5 0
2 years ago
CC14
maria [59]

Answer:

Na and Cl

Explanation:

An ionic compound is solid at state room temperature. Therefore Na and Cl would be the correct answer :)

5 0
2 years ago
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