Chemistry » Page 21

Chemistry

Addyson Gentry

what is the empirical formula for a compound which contains 32% carbon, 42.66% oxygen, 18.67 nitrogen, 6.67 % hydrogen

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Chemistry

Naima Sweeney

What type of reaction is shown in this thermochemical equation? A + B + heat → C + D

endothermic

combination

decomposition

exothermic

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Chemistry

Russo

The valence electrons of representative ("a" groups) elements are

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Chemistry

Berg

The Canadian lynx is a large wild cat that lives in the cold regions of Canada. The snowshoe hare is the main prey species that is hunted by the Canadian lynx. The snowshoe hare eats grass, fern, and leaves. If the population of Canadian lynx were to completely disappear, what would most likely happen to the food supply of the snowshoe hare?

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Chemistry

Braxton Brady

How many moles of glucose, c6h12o6, can be burned biologically when 10.0 mol of oxygen is available? c6h12o6 (s) + 6o2 (g) ? 6co2 (g) + 6h2o (l) ?

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Chemistry

Skyler Singh

How many significant figures are in 434.00

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Chemistry

Elliott

Which statement would support a merit of the Bronsted-Lowry base theory has over the Arrhenius base theory?

A) Hydronium ions are Bronsted-Lowry bases released in solution.

B) Bronsted-Lowry bases include both proton and hydroxide acceptors.

C) The Bronsted-Lowry bases can act as electron and proton acceptors.

D) Hydroxide ions are the only Bronsted-Lowry bases produced in solution.

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Chemistry

Adriel Ruiz

How are the properties of elements determined

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Chemistry

Kylie Pitts

An acid had a molarity of 0.01 M. What does the 0.01 M refer to?

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Chemistry

Chad

Why noble gas neon is an unreactive element?

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Chemistry

Elisha Huang

Any reaction that absorbs 150 kcal of energy can be classified as

a. activated.

b. exothermic.

c. oxidation.

d. endothermic

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Chemistry

Deborah Flores

Consider a triprotic acid like phosphoric acid or citric acid. which expression correctly describes the relative magnitudes of the three ka equilibrium constants?

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Chemistry

Armani Lin

A student used a 10 ml volumetric pipet to measure and deliver an unknown liquid to a flask for density determination. the student forced all of the liquid out of the pipet with the bulb. will the determined density of the liquid be correct, too high or too low?

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Chemistry

Diesel

How many liters of water must be added to 5.40 g of sodium nitrate to create a solution that has a concentration of 3.81 g/L?

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Chemistry

Amy Wilson

How does microorganisms affect the quality of soil

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