Chemistry » Page 33

Chemistry

Mariana

Which of the changes are physical changes

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Chemistry

Jaydan Norris

When PCl5 solidifies it forms PCl4 + cations and PCl6 - anions. According to valence bond theory, what hybrid orbitals are used by phosphorus in the PCl4 + cations?

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Chemistry

Aurora

Given that the mass of an electron is 5.486*10-4amu, and the mass of a proton is 1.007 amu, calculate how many times heavier a proton is than an electron

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Chemistry

Efrain Barron

Name one property that all metalloids have in common.

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Chemistry

Eliezer Gonzales

What kind of bond is formed between successive amino acids during translation?

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Chemistry

Gloria Townsend

Calculate the molarity of each aqueous solution: (a) 25.5 ml of 6.25 m hcl diluted to 0.500 l with water (b) 8.25 ml of 2.00*10-2 m ki diluted to 12.0 ml with water

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Chemistry

Gustavo Andrade

How many grams of mercury are needed to react completely with 157g of sulfur to form hgs?

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Chemistry

Juliana Moses

Calculate the mass of tetraborane (B4 H10) that contains a billion (1.0 x 10 * 9) boron atoms. Be sure your answer has a unit symbol if necessary, and round it to significant digigits.

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Chemistry

Haylie Colon

Starvation and uncontrolled diabetes mellitus can both result in

a. ketoacidosis, implying that high levels of ketone bodies in the blood must be well‑tolerated.

b. ketoacidosis, implying that the body of a person with uncontrolled diabetes mellitus is acting metabolically as though it is starving.

c. ketoacidosis, though in neither case due to overproduction of ketone bodies by the liver, but rather because cells are impaired in uptake of ketone bodies.

d. ketosis, implying that ketoacidosis is a result of uncontrolled diabetes mellitus but not starvation.

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Chemistry

Abraham Herrera

13. When iron nad is put in to a beaker containing copper sulphate solution.

of the solution slowly change in to Green

a) Why does the colour of the solution change?

b) Write the equation involved in this process?

c) Is it a chemical or physical change?

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Chemistry

Izaiah Leon

To prevent tank rupture during deep-space travel, an engineering team is studying the effect of temperature on gases confined to small volumes. What is the pressure of 4.00 molmol of gas DD measured at 251 ∘C∘C in a 1.75-LL container assuming real behavior? Express your answer with the appropriate units.

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Chemistry

Asa Pennington

What is significant about the elements within the same group of the periodic table?

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Chemistry

Danica Fritz

Darwin observed a variety of tortoises on the Galapagos Islands. These observations provided evidence for which of these statements?

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Chemistry

Jorge Palmer

Which statement correctly describes the actual yield and the theoretical yield of a reaction?

A.) The actual yield is calculated from the reactant amounts, but the theoretical yield must be measured for each instance of a reaction.

B.) The actual yield is calculated from the amount of the limiting reactant, and the theoretical yield is calculated from the amount of the excess reactant.

C.) The actual yield depends on the reaction conditions, but the theoretical yield varies only with reactant amounts.

D.) The actual yield represents the maximum yield possible, and the theoretical yield assumes perfect reaction conditions.

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Chemistry

Sage

How does heat get from the stove burner into

your soup?

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