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patriot [66]
4 years ago
9

How do you use a chemical formula to tell how the elements are bonded?

Chemistry
1 answer:
Rus_ich [418]4 years ago
8 0
In a chemical formula, we can see how many atoms from a certain element has participated for the compound and also we can clearly see what elements have been participated for the conpound
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Which expression represents a reaction rate?
scoray [572]
A. time/mass b. number/time c. energy/time d. time/energy
8 1
4 years ago
A particular brand of gasoline has a density of 0.737 g/mL at 25 ∘ C . How many grams of this gasoline would fill a 12.8 gal tan
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To answer this question, you need to know how to convert milliliters into liter then into a gallon. In this question, you are given the gasoline density (0.737g/ml) and the volume (12.8gallon). The information is enough to determine the gas weight. The calculation would be:

Gas weight= density * volume
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6 0
4 years ago
How many molecules of oxygen are produced when a sample of 38.9 g of water is decomposed by electricity?
statuscvo [17]

Answer:

A) 6.5\times 10^{23}\ \text{molecules}

Explanation:

m = Mass of water = 38.9

M = Molar mass of water = 18 g/mol

N_A = Avogadro's number = 6.022\times 10^{23}\ \text{mol}^{-1}

The reaction of electrolysis would be

2H_2O(l)\rightarrow 2H_2(g)+O_2(g)

Number of moles of H_2O

n=\dfrac{m}{M}\\\Rightarrow n=\dfrac{38.9}{18}\ \text{mol}

From the reaction it can be seen that 2 moles of H_2O gives 1 mole of O_2

So, number of moles of O_2 produced is

\dfrac{38.9}{18}\times \dfrac{1}{2}=1.081\ \text{mol}

Number of molecules

1.081N_A=1.081\times 6.022\times 10^{23}\\ =6.5\times 10^{23}

So, 6.5\times 10^{23}\ \text{molecules} of oxygen is produced.

8 0
3 years ago
How does Precipitation Form
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8 0
3 years ago
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Answer:

Component P, because being supported by ample evidence is a characteristic of a theory.

Explanation:

Hypothesis do not explain phenomenon they are just educated guesses that can be put into work to see if they are true of false.

Scientific theory on other hand, is widely accepted and supported by large amount of evidence and useful for explaining scientific phenomenon.

5 0
3 years ago
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