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fiasKO [112]
4 years ago
12

What is an example of a testable scientific question

Chemistry
1 answer:
11111nata11111 [884]4 years ago
5 0

Answer:

what are stars made of?

Explanation:

that's what google says

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Calculate the mass of a solute in a 10% salt solution if the mass is 350 grams.
Lyrx [107]

<u>Answer:</u> The mass of a solute is 35 grams

<u>Explanation:</u>

To calculate the mass percentage of solute, we use the equation:

\text{Mass percent of solute}=\frac{\text{Mass of solute}}{\text{Mass of solution}}\times 100

Mass percent of solute = 10 %

Mass of solution = 350 g

Putting values in above equation, we get:

10=\frac{\text{Mass of solute}}{350g}\times 100\\\\\text{Mass of solute}=\frac{10\times 350}{100}=35g

Hence, the mass of a solute is 35 grams

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An ecosystem is a geographical area......
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The right answer for the question that is being asked and shown above is that: "where plants, animals, the landscape and the climate are all independent of each other." An ecosystem is a geographical area <span>where plants, animals, the landscape and the climate are all independent of each other.</span>
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You want to compare the malleability of
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Sodium phosphate reacts with sulfuric acid to form sodium sulfate and phosphoric acid. What is the stoichiometric coefficient fo
Roman55 [17]

When sodium phosphate reacts with sulfuric acid, forming sodium sulfate and phosphoric acid, the stoichiometric coefficient for sulfuric acid in the balanced chemical equation is 3.

In every balanced chemical equation, the total number of individual atoms on the reactant side must be equal to the total number of individual atoms on the product side. The stoichiometric coefficient is the number written in front of each reactants and products that tells how many moles of each are needed in the reaction.

The chemical equation for the given reaction is:

Na_{3} PO_{4} + H_{2} SO_{4} = Na_{2} SO_{4} + H_{3} PO_{4}

Put the necessary stoichiometric coefficient to balance each element.

Balancing Na:

2Na_{3} PO_{4} + H_{2} SO_{4} = 3Na_{2} SO_{4} + H_{3} PO_{4}

Balancing P:

2Na_{3} PO_{4} + H_{2} SO_{4} = 3Na_{2} SO_{4} + 2H_{3} PO_{4}

Balancing S:

2Na_{3} PO_{4} + 3H_{2} SO_{4} = 3Na_{2} SO_{4} + 2H_{3} PO_{4}

Notice that H and O are already balanced.

Hence, the balanced chemical equation for the reaction is:

2Na_{3} PO_{4} + 3H_{2} SO_{4} = 3Na_{2} SO_{4} + 2H_{3} PO_{4}

where 3 is the stoichiometric coefficient of sulfuric acid, H_{2} SO_{4}.

Learn more about stoichiometric coefficient here: brainly.com/question/6666875

#SPJ4

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