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Chemistry

Alyvia

Iron has a density of 7.86 g/cm3. Calculate the volume (in dL) of a piece of iron having a mass of 4.77 kg. Note that the density is provided in different units of volume and mass than the desired units of volume (dL) and the given units of mass (kg). You will need to express the density in kg/dL (1 cm3 = 1 mL) before calculating the volume for the piece of iron.

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Chemistry

Adonis Harding

What is the empirical formula for a compound

with the molecular formula C6H12Cl2O2?

(1) CHClO (3) C3H6ClO

(2) CH2ClO (4) C6H12Cl2O2

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Chemistry

Cornelius Wilkinson

7. The molar mass of carbon is 12.0 g/mol, of hydrogen is 1.0 g/mol, and of oxygen is 16.0 g/mol.

How would you calculate the molar mass of ethanol (C2H60) ?

• 9 mol * 6.02 x 10^23g

• 2 x 12.0g/mol + 1 x 16.0 g/mol

• 9 mol (12.0 g/mol + 1.0 g/mol + 16 g/mol)

• 12.0 g / mol + 1.0 g/mol + 16 g/mol

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Chemistry

Guest

Science is 2 things. Describe what those 2 things are

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Chemistry

Hayden Pruitt

What does the subscript in a chemical formula represent (the 2 in H2) ?

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Chemistry

Maurice Grimes

How many significant figures are in the measurement, 0.005890 g?

4

6

7

5

8

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Chemistry

Lailah

When pure methanol is mixed with water the resulting solution feels warm would you expect this solution to be ideal? Explain

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Chemistry

Guest

What were three of the major complaints

a bgainst the Church?

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Chemistry

Guest

What is the solubility of a solid in a solvent?

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Chemistry

Declan

Scientists have created an exact scale replica of a rover currently found on Mars and a miniature 3D landscape identical to that where the rover is currently located. Before sending the rover over the treacherous Martian landscape, they wish to try their model rover first. Which features make this a good model for the scientists to use?

A. It is simplified to leave out details, which makes it easier to understand.

B. It is based on sound scientific principles.

C. It can be used to make predictions.

D. It can be analyzed and shown to be reliable or un-reliable.

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Chemistry

Emerson Bishop

In order from lowest to highest frequency, list the different waves of the electromagnetic spectrum

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Chemistry

Krueger

You have prepared a saturated solution of x at 20∘c using 31.0 g of water. how much more solute can be dissolved if the temperature is increased to 30∘c? express your answer with the appropriate units.

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Chemistry

Regan

Look at the chemical equation:

3H2 + N2 - 2NH3

How many atoms of hydrogen (H) are present on both sides of the equation?

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Chemistry

Philip York

The stigma of a plant produces a sugary substance. True False

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Chemistry

Nolan Atkins

Which of the following bond types is the strongest?

Question options:

A) hydrogen bond

B) Ion - Dipole

C) Dipole - Dipole

D) Ion - Induced Dipole

E) Dipole - Induced Dipole

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