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charle [14.2K]
3 years ago
10

Anthracite is so hard and pure it is also referred to as a _____.

Chemistry
1 answer:
Serga [27]3 years ago
6 0
<span>Anthracite is also referred to as hard coal because it is so hard and pure. It is very hard and highly compacted with variety of coal that has submetallic luster. It has highest carbon content, the lowest impurities, and highest density of energy of all the coal deposits.</span>
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What do scientists believe formed the moon's craters and regolith
seraphim [82]

Answer:

What is most widely accepted today is the giant-impact theory. It proposes that the Moon formed during a collision between the Earth and another small planet, about the size of Mars. The debris from this impact collected in an orbit around Earth to form the Moon.

Explanation:

4 0
3 years ago
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The law of conservation of matter states that matter can be neither created nor destroyed. Your friend shows you the following c
WITCHER [35]

Answer:

According to conservation of matter, there should be equal amounts of all elements on both the reactant and product side.

Reactant:

1 Ca

1 C

1 O

Product:

1 Ca

1 C

3 O

Therefore, your friend is right because the law of conservation of matter is not followed in this chemical equation.

Explanation:

6 0
2 years ago
At what temperature does water evaporate?
Alexus [3.1K]
It evaporates at 100°
4 0
3 years ago
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In lab you reacted 60 grams of propane (C3H8) with 13 grams of oxygen gas (O2). Your
Andre45 [30]

Answer:

120g

Explanation:

Based on the reaction, when 1 mole of propane and 5 moles of oxygen react, 3 moles of CO2 and 4 moles of H2O are produced. The ratio of production is 3 moles of CO2 per 4 moles of H2O.

Thus, we need to convert mass of water to moles using its molar mass:

Moles H2O (Molar mass: 18g/mol):

63g H2O * (1mol / 18g) = 3.5 moles H2O

Converting to moles of CO2:

3.5 moles H2O * (3 moles CO2 / 4 moles H2O) = 2.625 moles CO2

Mass CO2 (Molar mass: 44g/mol):

2.625 moles CO2 * (44g / mol) = 115.5g of CO2 are released

<h3>120g </h3>

5 0
3 years ago
When an acid like HCl dissociates in water, it essentially is ________.Select one:a. making the water more basicb. raising the p
jeyben [28]

1) Acidic solution. An acidic solution has a high concentration of H+ ions.

2) Basic solution. A basic solution has a high concentration of OH- ions.

3) HCl chemical reaction.

HCl+H_2O\rightarrow H_3O^++Cl^-

You can also write it as follows

HCl+H_2O\rightarrow H^++Cl^-

4) pH scale.

When the concentration of H+ is high, the solution is acidic. H+ lowers the pH of the solution.

Option D.

3 0
1 year ago
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