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3 years ago

Which of the following is the part of the experiment that is the change that is observed or measured?

Chemistry

1 answer:

solong [7]3 years ago

7 0

Answer:

The independent variable is the variable that is deliberately changed by the scientist. The dependent variable is the one observed during the experiment. The dependent variable is the data we collect during the experiment.

Explanation:

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Which ion in each pair has greater charge density? Explain. (c) Na⁻ or Cl⁻

boyakko [2]

Cl⁻ has a greater charge density than Na⁻.

The amount of electric charge that can build up across a unit length, unit area, or unit volume of a conductor is known as charge density. In other words, it shows the amount of charge that is held in a certain field. It determines how the charge is distributed and can be either positive or negative.

We encounter electric charge density when measuring electric fields from different continuous charge distributions including linear, surface, and volume. We must also take charge density into account when analyzing current electricity. We must first comprehend this concept of density in order to comprehend charge density. The definition of density for a thing is its mass per unit volume.

Size and charge density are inversely correlated, meaning that the smaller the size, the higher the charge density. This implies that Cl has a smaller volume and a higher charge density.

To know more about charge density refer to: brainly.com/question/12968377

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1 year ago

How many moles of sulfur are needed to react completely with 1.2 mol of O2?

valkas [14]

Quantity can always be used the same way as moles when interpreting balanced chemical equations.

6 0

3 years ago

What structures allow small particles to cross the cell membrane

RideAnS [48]

Ion channels allow things to cross the membrane

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3 years ago

You are running a rather large scale reaction where you prepare the grignard reagent phenylmagnesium bromide by reacting 210.14

almond37 [142]

Answer:

We would expect to form 7.35 moles of grignard reagent.

Explanation:

Step 1: Data given

Mass of magnesium = 210.14 grams

Volume bromobenzene = 772 mL

Density of bromobenzene = 1.495 g/mL

Molar mass of Mg = 24.3 g/mol

Molar mass of bromobenzene = 157.01 g/mol

Step 2: The balanced equation

C6H5Br + Mg ⇒ C6H5MgBr

Step 3: Calculate mass of bromobenzene

Mass bromobenzene = density bromobenzene * volume

Mass bromobenzene = 1.495 g/mL * 772 mL

Mass bromobenzene = 1154.14 grams

Step 4: Calculate number of moles bromobenzene

Moles bromobenzene = mass bromobenzene / molar mass bromobenzene

Moles bromobenzene = 1154.14g / 157.01 g/mol

Moles bromobenzene = 7.35 moles

Step 5: Calculate moles of Mg

Moles Mg = 210.14 grams /24.3 g/mol

Moles Mg = 8.65 moles

Step 6: The limiting reactant

The mole ratio is 1:1 So the bromobenzene has the smallest amount of moles, so it's the limiting reactant. It will be completely consumed ( 7.35 moles). Magnesium is in excess, There will react 7.35 moles. There will remain 8.65 - 7.35 = 1.30 moles

Step 7: Calculate moles of phenylmagnesium bromide

For 1 mole of bromobenzene, we need 1 mole of Mg to produce 1 mole of phenylmagnesium bromide

For 7.35 moles bromobenzene, we have 7.35 moles phenylmagnesium bromide

We would expect to form 7.35 moles of grignard reagent.

5 0

2 years ago

What does this weather map symbol represent

Black_prince [1.1K]

Answer:

Explanation:

Blue triangles are a cold front and red bowls are warm front

Stationary front is a combination

HOPE I helped :]

5 0

3 years ago

Read 2 more answers