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Chemistry

Alkanes, alkenes, and alkynes are examples of

A. aliphatic compounds

B. aromatic compounds

C. carcinogens

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Josephine Mckee

Chemistry

How many molecules of molecular oxygen react with four molecules of NH3 to form four molecules of nitrogen monoxide and six molecules of water?

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Chemistry

Element X has an electron configuration that ends with 5p6. Which of the following describes this atom correctly?

a. unstable metal

b. noble gas

c. alkali metal

d. unstable nonmetal

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Chemistry

If 12.1 kilograms of al2o3 (s), 60.4 kilograms of naoh (l), and 60.4 kilograms of hf (g) react completely, how many kilograms of cryolite will be produced?

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Charlee Oconnell

Chemistry

A certain ionic compound X has a solubility in water of 40.3 g/L at 20. degrees C. Calculate the mass X of required to prepare 500. mL of a saturated solution of X in water at this temperature. Be sure your answer has the correct unit symbol and 3 significant digits.

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Chemistry

IM ON A TIMER! What are the main types of star clusters? Check all that apply.

binary

eclipsing

globular

open

wobbling

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Chemistry

B) You have 665.46 grams of calcium chloride and 939.96 grams of aluminum

carbonate available. Calculate the theoretical grams of Calcium carbonate using

stoichiometric calculation.

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Chemistry

How much heat will be released when 0.750 moles of carbon monoxide (CO) react in an excess of oxygen gas? 2CO (g) + O2 (g) → 2CO2 (g) + 566 kJ

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Chemistry

The formation of a precipitate is an indication of a chemical change.

a. True

b. False

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Willow Mcknight

Chemistry

Which of the following is not an element that makes up all living organisms?

Nitrogen

Oxygen

Carbon

Rubidium

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Chemistry

If 65.0 g of nitrogen dioxide is reacted with excess water, calculate the theoretical yield

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Chemistry

Define a polyatomic ion?

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Chemistry

580 grams of boiling water (temperature 100°C, specific heat capacity 4.2 J/K/gram) are poured into an aluminum pan whose mass is 900 grams and initial temperature 24°C (the specific heat capacity of aluminum is 0.9 J/K/gram). After a short time, what is the temperature of the water? °C What simplifying assumptions did you have to make? Assume negligible energy transfer between the surroundings and the system consisting of the pan plus the water. Assume that energy diffuses throughout the pan and water so that all parts reach the same final temperature. Assume that the water temperature hardly changes. Assume the specific heat capacity is nearly constant in this temperature range. t

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Chemistry

Why are noble metals for example Rhodium, Palladium, Platinum, and Iridium largely used in chemical manufacturing as heterogeneous catalyst?

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Chemistry

If displacement is decreasing, then velocity is:

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