The U.S. Department of Energy has set the benchmark of 6% H by weight for an acceptable hydrogen storage material. Consider the following possible metals that form hydride phases: NaAlH4, LiAlH4, LaNi5H6, and TiFeH2. Which meet the DOE standard.

The U.S. Department of Energy has set the benchmark of 6% H by weight for an acceptable hydrogen storage material. Consider the following possible metals that form hydride phases: NaAlH4, LiAlH4, LaNi5H6, and TiFeH2. Which meet the DOE standard.

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter19: The Chemistry Of The Main-group Elements

Section: Chapter Questions

Problem 19QRT

See similar textbooks

Related questions

Q: Why are nitric and hydrochloric acid depositions less of a problem in most parts of the world than…

A: Acid deposition, also called acid rain, is a form of precipitation formed from the combustion…

Q: Some oxide superconductors adopt a crystal structure similar to that of perovskite (CaTiO3). The…

A: Ti4+ ion in each corner = 18×8 =1 Ca2+ ion in the body center = 1 O2- ions at the midpoint of each…

Q: Sketch the structure of a 1:1 and 2:1 layer silicates.

A: Structure of 1:1 layer silicate (kaolinite) illustrating the connection between tetrahedral and…

Q: Silicon has a face-centred cubic structure with two atoms per lattice point, just like diamond. At…

A: Given : a = 543.1 pm

Q: Calculate the amount of air by mass required for complete combustion of 2000 kg of coke assuming…

A: Mass of carbon and its purity, for which the amount of air required for the complete combustion is…

Q: A silicon wafer with dimensions 16.00 cm x 16.00 cm x 0.0200 cm contains 0.425 moles of silicon. How…

Q: Silicic acid, SiO2.xH2O(s), is a weaker acid than carbonic acid, H2CO3(aq). Write a balanced…

A: Chemical reaction is given by, Mg2SiO4 + 4CO2 + 2H2O 2Mg+2 + 4HCO3- + H4SiO4 Mg2SiO4 + 4H2CO3…

Q: Discuss the nature of bonds in NaCl and diamond. What do you mean by directionality of covalent…

A: Ionic bonds are formed when the atoms transfer electrons among each other leading to formation of…

Q: Determine the number of atoms per unit cell shown - Zinc blende (cubic ZnS) -

A: First diamgram n = (1/6×12)+(4×1)+(1/2×2) = 7 Second diagram n = (1/8×8)+(1/2×2) = 2 Third diagram…

Q: Tourmaline is the most colorful of all gemstones. It neutralizes negative forces and offers…

A: Mole of a substance is that quantity that contain 6.022 x 1023 units of that substance. It is also…

Q: Write the balanced chemical equation for the reaction of aluminum with iodine. Include phase…

A: The balanced chemical equation for the reaction of aluminum with iodine can be written as,

Q: Use the following atomic masses (in g/mol): Mg = 24.31; O = 16; Ca = 40.08; C = 12.01; Na = 23; H =…

Q: what is The

A: Nanomaterials are chemical substances having dimension of 1-100 nm. They are by-products of…

Q: How many of these elements would be able to bond with the silica tetrahedra SiO4 - molecules? Group…

A: The chemical composition of silica embodies a tetrahedral structure, comprising a central silicon…

Q: 1. Radii were reported as follows: Ti* = 60 pm; O² = 140 pm. Based on this, tell as much as you can…

A: TiO2 is a tetragonal structure lattice. Ti4+ = 60 pm O2- = 140 pm So, r+/r- = 60/140 = 0.428 So,…

Q: (a) A hypothetical compound MB2 crystallises in the rutile lattice structure. (i) Draw the lattice…

Q: If 55 g of SiO2 glass is placed into 111 L of 0.032 M HF, is there enough HF to dissolve all of the…

A: The balanced equation for the reaction is given below.

Concept explainers

Environmental Pollution

Environmental pollution occurs due to some unwanted alteration in the surroundings which results in unfavorable effects on all organisms of that surrounding.

Question

The U.S. Department of Energy has set the benchmark of 6% H by weight for an acceptable hydrogen storage material. Consider the following possible metals that form hydride phases: NaAlH₄, LiAlH₄, LaNi₅H₆, and TiFeH₂. Which meet the DOE standard.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.

Similar questions

Sketch the silicon–oxygen tetrahedron and explain how these fundamental building blocks join together to form other silicate structures.
Radii were reported as follows: Ti4+ = 60 pm; O2‒ = 140 pm. Based on this, tell as much as youcan about the expected structure of TiO2 – provide the hole type for the cation, the cell lattice,and the coordination numbers for both cation and anion.
A student investigated the stoichiometry of the nickel (II) nitrate - sodium sulfide - water system using a mole ratio experimental design and reported the data given in the table. Write a chemical equation for the reaction of Ni(NO3)2 with Na2S showing the stoichiometry of the reaction.
The hydration reaction involving dicalcium silicate is as follows: 2CaO-SiO2 + 3H2O = 2CaO-SiO2-3H2O Calculate the amount of limestone necessary to produce 3000 kg of 2CaO-SiO2-3H2O and the volume of the CO2 released in the atmosphere. The calcination reaction of limestone to produce the necessary CaO is СаСОз —> СаО + CO2 Atomic mass: Ca =40 amu, Si=28 amu, C=12 amu, O=16 amu and H=1 amu.
(1) Diamond and graphite are two minerals with identical chemical compositions, pure carbon (C). Diamond is the hardest of all minerals, and graphite is one of the softest. If their compositions are identical, why do they have such profound differences in physical properties? (2) silicon and oxygen together make up nearly 75 percent by weight of the Earth's crust. But silicate minerals make up more than 95 percent of the crust. Explain the apparent discrepancy. (3) If you were given a crystal of diamond and another of quartz, how would you tell which is diamond? (4) Would you expect minerais found on the Moon, Mars, or Venus to be different from those of the Earth's crust? Explain your answer. (5) Quartz is Si02. Why does no mineral exist with the composition Si03?
Describe the difference between vitreous silica and soda-lime glass.
Consider we have a silicate glass composition, this composition as shown below in percent by weight 15Na₂O +5K₂O + 2.5MgO +9.5 CaO +6 BaO + 5Al₂O3 +57 SiO₂. First, convert this composition to mole percent. Then classify each oxide added to the glass according to Sun's bond criteria. According to this classification, is this composition make glass or not? Min MO K Mg Ca Al Si Valance 1 1 2 2 2 3 4 Dissociation energy per MOX (in Kcal.) 120 115 222 257 260 402 424 Coordination Number 6 9 6 8 8 4 4 Molecular weight of oxides is shown below Oksitier (Molekil Agri): NajO (61.97), K,0 (94.18), MgO (40.31), CaO (56.08), Bao (153.33), ALO, (1015), 50, (60.08) Single Bond Strength (Kcal/mole) 20 13 37 32 33 101 106
Why is boron oxide often added to silica glass?
We're told oxygen is the most common element in the Earth's solid crust. But how much oxygen is there? Let's compare to the amount of oxygen in the Earth's atmosphere, like this: • The most common minerals in the Earth's crust are feldspars, and sanidine (KAISI,Og) is a typical feldspar. Let's assume the entire crust is made of sanidine, with a density of 2.5 g/cm°. • The radius of the Earth is 6371. km and let's say the crust is the upper 75.0 km of it. olo 3 • Let's model the Earth's atmosphere as a layer on top of the Earth about 100. km thick with an average density of 0.99 g/m", and which is 23.1% oxygen Ar by mass. Use this information to calculate the ratio of the mass of oxygen in the Earth's atmosphere to the mass of oxygen in the Earth's crust. Round your answer to 2 significant digits.
Describe the bonding in calcium oxide, CaO, in terms of bands composed of Ca and O atomic orbitals. How does this model justify the ionic model of this compound?
Silicon carbide (SiC) is made by the high-temperature reaction of silica sand (quartz) with coke; the byproduct is carbon monoxide.(a) Write a balanced chemical equation for this reaction.(b) Calculate the standard enthalpy change per mole of SiC produced.(c) Predict (qualitatively) the following physical properties of silicon carbide: conductivity, melting point, and hardness.
Provide the chemical equations given the following conditions.Calculate the weights of Fe2O3 and Fe3O4.