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4 years ago

Which step of the scientific method involves obtaining resources for your question?

Chemistry

2 answers:

max2010maxim [7]4 years ago

6 0

The answer is C "Do background research."

djyliett [7]4 years ago

3 0

I would say it is constructing a hypothesis, that is because a hypothesis is basically gathering information or resources to support what your question was. so i say it is B.

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A student reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

dybincka [34]

Answer:

Explanation:

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3 years ago

A 0.500-g sample of chromium metal reacted with sulfur powder to give 0.963 g of product. Calculate the empirical formula of the

IgorC [24]

Answer: The empirical formula for the given compound is $Cr_2S_3$

Explanation : Given,

Mass of product = 0.963 g

Mass of Cr = 0.500 g

Mass of S = 0.963 g - 0.500 g = 0.463 g

To formulate the empirical formula, we need to follow some steps:

Step 1: Converting the given masses into moles.

Moles of Cr = $\frac{\text{Given mass of Cr}}{\text{Molar mass of Cr}}=\frac{0.500g}{52g/mole}=0.00962moles$

Moles of S = $\frac{\text{Given mass of S}}{\text{Molar mass of S}}=\frac{0.463g}{32g/mole}=0.0145moles$

Step 2: Calculating the mole ratio of the given elements.

For the mole ratio, we divide each value of the moles by the smallest number of moles calculated which is 0.00962 moles.

For Cr = $\frac{0.00962}{0.00962}=1$

For S = $\frac{0.0145}{0.00962}=1.5$

To make in a whole number we are multiplying the ratio by 2, we get:

The ratio of Cr : S = 1 : 1.5

The ratio of Cr : S = 2 : 3

Step 3: Taking the mole ratio as their subscripts.

The ratio of Cr : S = 2 : 3

Hence, the empirical formula for the given compound is $Cr_2S_3$

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4 years ago

Slope equal rise over..??

Alenkasestr [34]

See what you get.) The formula for slope<span> is sometimes referred to as "</span>rise over<span> run", because the fraction consists of the "</span>rise<span>" (the change in y, going up or down) divided by the "run" (the change in x, going from left to the right).</span>

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3 years ago

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Marina86 [1]

Digging of wells being able to increase aquifer is something I agree with.

<h3>What is an Aquifer?</h3>

This is a water permeable rock layer which is found in the underground layer of the earth.

Wells will ensure water seeps into these layers thereby bringing about an increase in the aquifer.

Read more about Aquifer here brainly.com/question/15921008

#SPJ1

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2 years ago

How can a large body of water, such as an ocean, influence climate?

Nat2105 [25]

ANSWER- ocean winds can carry moisture with then mmm and can bring rain.

Hope this helps leave a thanks!

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3 years ago

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