Metallurgy Questions and Answers

The compound aluminum iodide is a strong electrolyte. Write the reaction when solid aluminum iodide is put into water:

When the nuclide polonium-210 decays to lead-206, what kind of decay does polonium-210 undergo? (Select all that apply.) positron emission electron capture alpha decay beta decay

For the following statements (1) Cast iron is purest form of commercial iron (2) The temperature in reduction of zinc oxide (using coke) is higher than Copper oxide (3) Copper is used for galvanising iron (4) The metal which is liquid at room temperature is refined by zone refining Choose the correct sequence where I represents true and F represent false. TTFT TTFF FTFF TFTT

Look at the equation below: 2 Al + 3 CuSO4 - 3 Cu + 1 Al2(SO4)3 During an experiment, 0.35-g of copper (II) sulfate, CuSO4, decomposes according to the reaction above. How many moles of copper would be expected to form? Hint You'll need the molar mass of CuSO4 0.0032 males of Cu 0.0022 moles of Cu 0.0016 moles of Cu 0.0029 moles of Cu

112 grams of lithium nitrate reacts with lead (IV) sulfate according to the reaction equation shown below. Pb(SO4)2 + LINO3 → Pb(NO3)4 + Li₂SO4 Calculate the number of moles of lead (IV) nitrate produced during the reaction.

When do we use Simple Progressive Tense? A) To describe actions happening over a current time period (this semester) B) To describe routines and habits C) To describe temporary actions D) With adverbs "usually," "often," and "sometimes" E) A and C

Arrange the following elements in order of decreasing ionization energy. Rank from highest to lowest ionization energy. To rank items as equivalent, overlap the molybdenum Reset silver germanium phosphorus strontium

Why do stars seem to twinkle? Shifting currents of air low in the atmosphere bend starlight, causing it to miss our eyes in fractions of moments. Stars are so far out in space that other orbiting objects in space block our view at certain moments. Starlight is so bright that our eyes protect us by filtering out some of the light. Starlight is light from dying stars that give off interrupted light.

(a) Read the following description of the element zinc and indicate which are physical properties and which are chemi- cal properties. Zinc melts at 420 °C. When zinc granules are added to dilute sulfuric acid, hydrogen is given off and the metal dissolves. Zinc has a hardness on the Mohs scale of 2.5 and a density of 7.13 g/cm³ at 25 °C. It reacts slowly with oxygen gas at ele- vated temperatures to form zinc oxide, ZnO. (b) Which properties of zinc can you describe from the photo? Are these physical or chemical properties?

One sunflower pot is watered with pure water and 3 others are watered with increasing concentrations of salt water. The height of the sunflowers is measured weekly. What is the independent variable in this investigation? the pure water the concentration of salt water height of the sunflowers the species of flower

Select all that apply Which of the following options correctly describe the mass number of an element? Select all that apply. The mass number is given by the sum of the protons and neutrons in the nucleus. The mass number is often written as a left superscript next to the atomic symbol. The mass number of an element is given the symbol A. The mass number of a particular element never varies. In a neutral atom, the mass number equals the number of electrons in the atom.

Which of the following options correctly describe the mass number of an element? Select all that apply. The mass number is given by the sum of the protons and neutrons in the nucleus. The mass number is often written as a left superscript next to the atomic symbol. The mass number of an element is given the symbol A. The mass number of a particular element never varies. In a neutral atom, the mass number equals the number of electrons in the atom.

Consider a burning candle. Reactants are the chemicals that are present before a reaction occurs while the products are the chemicals that are made by the reaction. Which of the following is true? (MARK ALL THAT APPLY) The reactants are more chemically stable than the products. The reactants have less stored energy than the products. The reactants are less chemically stable than the products. Less energy is required to start the reaction than is released by the reaction itself. The ore stored energy a substance has the more chemically stable it is. The reactants have more stored energy than the products. The more stored energy a substance has the less chemically stable it is. More energy is required to start the reaction than is released by the reaction itself.

What is the correct net ionic equation, including all coefficients, charges, and phases, for the following set of reactants? Assume that the contribution of protons from H₂SO4 is near 100 %. Ba(OH)2 (aq) + H₂SO4 (aq) →

Fill in the orbital energy diagram for the fluorine atom.

Compute 4.659 x 10^4 - 2.14 x 10^4. Round the answer appropriately. Express your answer as an integer using the proper number of significant figures (e.g. 12300). 4.659 x 10^4 - 2.14 x 10^4 =

Consider the following chemical equations. Select the equations that represent chemical reactions, rather than physical changes. 1. 2NO(g) + O₂(g) - 2NO₂(g) 2. CO₂ (s) -> CO2(g) 3. Pb(NO3)2(aq) + 2AgCl(aq) -> PbCl2(s) + 2AgNO3(aq) I, II, and III I and II only I and III only I only II and III only

A piece of metal was found on the side of the road. The metal was put on a balance and found to have a mass of 79.10 g. The volume was determined by placing the metal into a 27.00 ml column of oil, which was displaced to 34.00 mL. What was the volume of the unknown metal in mL. What was the Density of this metal? What was this metal. Volume = 7.00 ml Density = 11.3 g/mL Metal = lead Volume = 4.00 ml Density = 2.7 g/ml Metal = aluminum Volume = 7.00 ml Density = 19.1 g/ml Metal = uranium Volume = 8.00 ml Density = 7.14 g/ml Metal = zinc

Metamorphic rocks that have a banded appearance due to the alignment of minerals are called foliated nonfoliated clastic glassy

The formation of igneous rocks is powered by the sun compaction erosion Earth's internal heat

A fine-grained igneous rock forms deep within Earth from magma as the result of slow cooling as the result of quick cooling

Predict the starting materials of the following reactions, then write a balanced reaction showing the complete molecular equation: a.→ CaSO4(aq) +H₂0(1) b. → Na3PO4(aq) +H20(1) c. → MgCl₂(aq) + H₂(g)

Consider the following metals, A, B C and D at room temperature. 10.00 g of each metal absorbs 15kJ. Which metal will reach the highest temperature? Metal Specific Heat (Cs) in kJ/g°C A 1.0 B 5.0 C 10.0 D 25.0