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Roman55 [17]
3 years ago
14

If the name of a compound ends in -ide, we know that the compound is made of __________ elements. What completes the sentence?

Chemistry
1 answer:
slava [35]3 years ago
3 0

Answer:

Two

Explanation:

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Which of the following is true about the offspring of an organism X that reproduces asexually?
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8 0
3 years ago
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Help me understand molarity please
Katyanochek1 [597]
Molarity/ molar is a unit of concentration, symbolized by "M". It is the ratio of the number of moles of solute and the volume of solution.

Molarity = Moles of solute ÷ Liters of solution = moles/liter = M
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3 0
3 years ago
A balloon filled with helium has a volume of 6.9 L. What is the mass, in grams, of helium in the balloon?
balandron [24]

Answer : The mass of helium gas in the balloon is, 1.23 grams.

Explanation : Given,

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First we have to calculate moles of helium gas at STP.

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As, 22.4 L volume of helium gas present in 1 mole of helium

So, 6.9 L volume of helium gas present in \frac{6.9L}{22.4L}\times 1mole=0.308mole of helium

Now we have to calculate the mass of helium gas.

\text{Mass of He gas}=\text{Moles of He gas}\times \text{Molar mass of He gas}

Molar mass of He gas = 4 g/mol

\text{Mass of He gas}=0.308mol\times 4g/mol=1.23g

Thus, the mass of helium gas in the balloon is, 1.23 grams.

6 0
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Flavor enhancer chemical formula
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When two aqueous solutions are mixed together the temperature of the solution decreases?
Andre45 [30]
When two aqueous solutions are mixed together and the temperature of the solution decreases, the reaction is called an endothermic reaction with a positive enthalpy change. Endothermic reaction is when heat is absorbed by the reaction taking place. All endothermic reaction always have a positive enthalpy change.
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