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Chemistry

What is the standard enthalpy change for the formation of one mole of strontium carbonate, srco3 (s), from elements?

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Chemistry

What is molarity a measurement of?

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Chemistry

Aluminum is a group 3a metal. which ion does a1 typically form?

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Chemistry

What type of reaction is shown below?

CaCl2 (aq) + MgSO4 (aq) - -> CaSO4 (s) + MgCl2 (aq)

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Chemistry

Are we likely to run out of gold in the near future?

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Chemistry

What is the pH of blood, given the hydrogen ion concentration is 4.0 * 10-8M?

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Chemistry

What's the empirical formula of a molecule containing 54.5% lithium, 9.2% carbon, and 36.6% oxygen?

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Chemistry

What is the net force f⃗ net that the dipole experiences due to the electric field?

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Chemistry

A solution has a hydroxide ion concentration of 1 * 10-5 M. What is the hydrogen ion concentration of the solution?

(a) 1 * 10-1 M

(b) 1 * 10-5 M

(c) 1 * 10-9 M

(d) 1 * 10-14 M

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Chemistry

Which formula stands for boric acid?

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Chemistry

Identify one type of electromagnetic energy that has a shorter wavelength than green light.

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Chemistry

According to Le Châtelier's principle, how will an increase in concentration of a reactant affect the equilibrium system?

Shift it toward the products

Shift it toward the reactants

Shift it toward the side with higher total mole concentration

Shift it toward the side with lower total mole concentration

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Chemistry

At this lower concentration, about how many extra hydrogen bonds would be needed to hold a and b together tightly enough to form the same proportion of the ab complex?

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Chemistry

A 0.21 m3 (55 gal) drum contains 100 L of a mixture of several degreasing solvents in water. The concentration of trichloroethylene in the headspace (gas phase) above the water was measured to be 0.00301 atm. The Henry's constant for trichloroethylene is 0.00985 atm·m3·mol-1 at 25°C. What is the concentration of trichloro-ethylene in the water in units of molarity? (Assume that the temperature of the solution is 25°C.)

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Chemistry

What is an atomic weight?

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