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ArbitrLikvidat [17]
3 years ago
11

A substance that exist in the gaseous state at room temperature

Chemistry
1 answer:
kati45 [8]3 years ago
7 0

Answer:

Hydrogen, Helium, Neon, Argon, Krypton, Xenon, Chlorine, Fluorine, Bromine, Nitrogen, and Oxygen.

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What is the mass of 14.10 moles of Li2O?
galina1969 [7]

Answer:

421.32774 grams

Explanation:

7 0
3 years ago
What month and what year did Matthias Schleiden contribute to the cell theory.
Brums [2.3K]

Answer:

Matthias Jacob Schleiden was a German botanist who, with Theodor Schwann, cofounded the cell theory. In 1838 Schleiden defined the cell as the basic unit of plant structure, and a year later Schwann defined the cell as the basic unit of animal structure.

Explanation:

4 0
4 years ago
What mass of oxygen reacts when 84.9 g of iron is consumed in the following reaction: Fe+O2= Fe2O3
konstantin123 [22]
First we will calculate the number of moles of Iron:
n =  \frac{m}{M}
, where n is the number of moles, m is the mass of iron in the reaction and M is the Atomic weight.
n= \frac{84.9}{55.845} = 1,52 moles of Iron.
The same number of moles of Oxygen will take part in the reaction.
So 1,52= \frac{mOxygen}{32} where 32 is the Atomical Weight of Oxygen (16 x 2).
=>mOxygen=32*1,52=48,64g
6 0
3 years ago
Read 2 more answers
CO2 + H2O --> C2H2 + O2
vagabundo [1.1K]

Answer:

C2H2 + 5 O2 = 4 CO2 + 2 H2O

Add / Edited: 27.09.2014 / 25.01.2015

Evaluation of information: 5.0 out of 5 / number of votes: 2

Source: https://chemiday.com/en/reaction/3-1-0-339

Explanation:

5 0
3 years ago
Please respond guys I’ll give brainliest and 100 points
Contact [7]

Answer:

Name

Atomic Number

Atomic Symbol

Atomic Weight

Phase

Color

Classification

Group in Periodic Table

Group Name

Period in Periodic Table

Block in Periodic Table

Electronic Configuration

Melting Point

Boiling Point

Electronic Shell Structure

CAS Number

Neighborhood Elements

Lithium

3

Li

6.941

Solid

Silver

alkali metal

1

lithium family  

2

s

[He] 2s1

180.54 °C

1342 °C

2, 1

CAS7439-93-2

Neighborhood Elements of Lithium

Cesium

55

Cs

132.90545

Solid

Silver

alkali metal

1

lithium family  

6

s

[Xe] 6s1

28.44 °C

671 °C

2, 8, 18, 18, 8, 1

CAS7440-46-2

Neighborhood Elements of Cesium

Explanation:

4 0
3 years ago
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