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Likurg_2 [28]
2 years ago
7

The amount of heat energy needed to heat 200 g of water from 15 °C to its boiling point, and boil it, is

Chemistry
1 answer:
Svetllana [295]2 years ago
4 0

can you explain it further

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Which statement correctly compares the number of chromosomes in a body cell to that in a sex cell of humans?
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The answer is C: "<span>A body cell has 46 chromosomes; a sex cell has 23"</span>
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Automobile air bags use the decomposition of sodium azide as their sources of gas for rapid inflation, represented in the reacti
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3 years ago
How many moles are in 135g of Teflon?
Oliga [24]

1.34 moles are in 135g of Teflon.

Explanation:

Molecular formula of teflon is (C2H4)n

mass of teflon = 135 grams

atomic mass of teflon = 100.01 gram/mole

number of moles of teflon = ?

Formula used to calculate number of moles in a substance is given as:

number of moles = \frac{mass}{atomic mass of 1 mole}

putting the values in the above equation:

number of moles = \frac{135}{100.01}

number of moles = 1.34 moles

Teflon is polymer which is used for making non-stick coating, in 135 grams of teflon there are 1.34 moles in it.

5 0
3 years ago
If 120 g of potassium chloride are mixed with 100 g of water at 80°C, how much will not dissolve?
djverab [1.8K]

Answer:

yes

Explanation:

How many grams of KCl will dissolve in 1 liter of H2O at 50 °C? 5. 58.0 g of K2Cr2O7 is added to 100 g H2O at. 0 °C. With constant stirring, to what temp-.

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3 years ago
Write a balanced chemical equation (smallest integer coefficients possible) for the reaction between an acid and a base that lea
11Alexandr11 [23.1K]

Answer:

2HClO4(aq) + Ca(OH)2(aq) → Ca(ClO4)2(aq) + 2H2O(l)

Perchloric acid + Calcium hydroxide → Calcium perchlorate + Water.

Explanation:

This is a neutralization reaction where the acid, Perchloric acid reacts completely with an appropriate amount of base, aqueous Calcium hydroxide to produce salt, aqueous Calcium perchlorate and water, liquid H2O only.

During this reaction, the hydrogen ion, H+, from the HClO4 is neutralized by the hydroxide ion, OH-, from the Ca(OH)2 to form the water molecule, H2O.

Thus, it is called a neutralization reaction.

6 0
3 years ago
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