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sveta [45]
3 years ago
11

How do you convert 642cg to kilograms

Chemistry
2 answers:
Eva8 [605]3 years ago
5 0
0.642 kg..................................................
murzikaleks [220]3 years ago
3 0
La habla espanol yo soy un pedro!
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What is the best way to learn radicals ?​
Levart [38]

Answer:

To make this work, you'll either need to: Learn the names of all the radicals first, before you even look at any kanji. This method feels slow at first, but overall it's probably going to take a similar amount of time compared to any other method.

3 0
2 years ago
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Which of these substances is a compound <br><br> Carbon<br> Chlorine<br> Uranium <br> Ammonia
svetlana [45]
The answer to this question will be Uranium
4 0
3 years ago
What is the percent composition of C4H10? (4 points)
Marina CMI [18]

Answer:82.7% C and 17.3% H

Explanation:

C4 = 12.0107g/mol x 4 = 48.0428 g/mol

H10 = 1.00794 g/mol x 10 = 10.0794 g/mol

Molar Mass of Butane, C4H10 =  48.0428 g/mol + 10.0794 g/mol= 58.1222 g/mol

percent composition of Carbon is  = ( mass of carbon contained in butane / molar mass of Butane) x 100

=(48.0428 /58.1222) x 100% = 0.8265 x 100

=82.65% =82.7% of Carbon.

Percent composition of Hydrogen  = (mass of Hydrogen contained in Butane / molar mass of Butane )x 100  

( 10.0794/58.122 ) x 100% =0.1734 x 100

= 17.3% OF Hydrogen.

6 0
3 years ago
How many atoms of the element with atomic number 11 are in the reactants of the given formula?
liq [111]

The number of Na atoms in the reactants = 2

<h3>Further explanation</h3>

Every chemical reaction involves compounds that can act as reactants or products

The reactants will react to produce products

The reactants are usually written on the left side of the reaction, while the products on the right side of the reaction

Reaction

2 NaCl + H₂SO₄ → 2 HCl + Na₂SO₄

The element with atomic number 11  = Na(Natrium)

The number of atoms of the element that reacts or is produced can be seen from the reaction coefficient and the number of atoms in the compound

Na in NaCl = 1 atom

From equation, cofficient for NaCl = 2, so number of atoms of Na=2 x 1 = 2

3 0
3 years ago
What is the relationship between the volume of a gas and its pressure?
erastova [34]

Answer:

inversely proportional

Explanation:

7 0
3 years ago
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