Chemistry » Page 15

Donna Christian

Chemistry

At room temperature and pressure what is the volume of one mole of oxygen?

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Fernanda Meyers

Chemistry

Ibuprofen, a common pain remedy, has an empirical formula of C7H9O and a molar mass of approximately 218.078 grams per mole. What is the molecular formula of ibuprofen?

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Chemistry

Copper (cu) is a transition element used in the making of coins. calculate the mass in grams of 0.0420

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Chemistry

In 1864, the Solvay process was developed to make soda ash. One step in the process is represented by the balanced equation below.

NaCl + NH3 + CO2 + H2O → NaHCO3 + NH4Cl

Write the chemical formula for one compound in the equation that contains both ionic bonds and covalent bonds. Explain, in terms of electronegativity difference, why the bond between hydrogen and oxygen in a water molecule is more polar than the bond between hydrogen and nitrogen in an ammonia molecule. In the space in your answer booklet, draw a Lewis electron-dot diagram for the reactant containing nitrogen in the equation.

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Chemistry

A chemist must prepare of aqueous potassium permanganate working solution. He'll do this by pouring out some aqueous potassium permanganate stock solution into a graduated cylinder and diluting it with distilled water. Calculate the volume in of the potassium permanganate stock solution that the chemist should pour out. Round your answer to significant digits.

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Cassie Jefferson

Chemistry

What is the best name for the molecule below? a compound with 10 total carbons with a double bond and the rest single bonds. there is a straight chain of seven carbons along the bottom with a double bond between the third and fourth carbons when counting from left to right. there is a propyl group branching off of the fifth carbon from the left. 5-propyl-3-heptene 5-ethyl-3-octene 3-ethyl-5-octene 3-ethyl-4-heptene?

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Chemistry

What Word means the gradual change and build up of organisms in an enviroment

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Chemistry

If you see the Sun is high in the sky, what can you say about the SUN as viewed from the opposite side of Earth at the same moment?

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Magdalena Garza

Chemistry

What element has 8 valence electrons

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Chemistry

Which of the following best describes a metal? Brittle, shiny, and solid Brittle, dull, and low density Malleable, shiny, and able to conduct heat or electricity Malleable, dull, and solid, liquid, or gas at room temperature?

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Chemistry

Which of the following errors could cause your percent yield to be falsely high, or even over 100%?

Select ALL that apply.

A.) Heating the sample too vigorously.

B.) Handling the crucible directly with your hands.

C.) Failing to completely decompose the sodium bicarbonate sample.

D.) Taking the mass of the empty crucible without the lid, but including the lid in all other mass measurements.

E.) Taking the mass of all samples with the lid included.

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Chemistry

If 56.8 ml of bacl2 solution is needed to precipitate all the sulfate ion in a 554 mg sample of na2so4 (forming baso4), what is the molarity of the solution?

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Chemistry

is the number of total atoms on the left side of a balanced equation always equal to the number of total atoms on the right side of the equation?

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Chemistry

Compared to a sample of helium at STP, the same sample of helium at a higher temperature and a lower pressure A) condenses to a liquid. B) is more soluble in water C) forms diatomic molecules. D) behaves more like an ideal gas

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Chemistry

What country was overrun by the Japanese

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