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ChemistryChemistry
Which are examples of contact forces?
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Rico
ChemistryChemistry
Nitrogen has two naturally occuring isotopes, N-14 and N-15. The atomic mass of nitrogen is 14.007 amu. Which isotope is more abundant in nature?
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Josue Rollins
ChemistryChemistry
Which element has the greatest electronegativity?

a. Chlorine

b. Oxygen

c. Sulfur

d. Phosphorus

e. Fluorine
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Campbell Mendez
ChemistryChemistry
Why is the blood that flows from the heart bright red rather than dark red?
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Ean Serrano
ChemistryChemistry
To what part of a plant does the stem sliver water and nutrients
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Zayden Vaughan
ChemistryChemistry
What does a dissolved salt look like?
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Cameron Barnes
ChemistryChemistry
Which one of the following statements is true? Both chemical and physical changes can involve a change in appearance. Neither chemical nor physical changes involve a change in appearance. Only physical changes involve a change in appearance. Only chemical changes involve a change in appearance.
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Belen Bridges
ChemistryChemistry
Describe when an ionic compound can conduct electricity
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Geovanni Morse
ChemistryChemistry
A element which is not a monatomic

A. Helium

B. Argon

C. Iron

D. Oxygen
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Darwin Garrett
ChemistryChemistry
How can you use the Periodic Table to determine whether an element is a metal, nonmetal, or metalloid?
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Jasiah Yu
ChemistryChemistry
A block of metal has a width of 3.2 cm, a length of 17.1 cm, and height of 4.2 cm. Its mass is 1.1 kg. Calculate the density of the metal.
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Isaiah Haas
ChemistryChemistry
Why is the formula CCL4 a nonvolatile molecule with polar covalent bonds?
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Tamara
ChemistryChemistry
Why does beryllium lose electrons when forming ionic bonds, while sulfur gains electrons?
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Jack Serrano
ChemistryChemistry
Which of the following statements regarding enzymes is FALSE? a. Enzymes alter the free energy change (ΔG) of the reactions which they catalyze. b. Enzyme function is dependent on the pH and temperature of the reaction environment. c. Enzyme function is dependent on the three-dimensional structure or conformation of the enzyme. d. Enzyme activity can be inhibited if the enzyme is bound by a noncompetitive inhibitor.
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Josiah Mcintyre
ChemistryChemistry
5. How many moles of gas are in a 7.5 L container, at 1 atm of pressure, at 100 degrees

celcius? (R = 8.31)

a. 15 moles

b. 0.0024 moles

c. 9135 moles

d ...109
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