Life-cycle assessment (LCA) is defined as the study of resource consumption, emissions, and their impacts on the environment. During which of the following stages LCA examines the energy and material flow? * Raw material production, processing, and manufacturing

Q: The radius of a strontium atom is 215 pm. How many strontium atoms would have to be laid side by…

A: Given that Radius of strontium atom = 215 pm . Since we know that Diameter = 2 × Radius =2 × 215 pm…

Q: 7. F2 (g) NacI (s) +

A: Balance chemical equation, balance chemical equation can be define as the reaction in which number…

Q: C) Eto. ال meo. + + Co₂ Et [11 CHO I 7 CHO 7 e) Mod +- -

A: Use cycloaddition reaction in presence of heat Stereochemistry keep in mind of each reaction.

Q: This question is complete.... is it 1,2,3 or 4?

A: This question not complete. It should be and instead or . Now This question is complete 1,2,3 and 4

Q: Which of the following elements is a metal? O о As I Sn Se

A: To solve this problem we have to identify the given elements as metals

Q: A student is given five metals, labelled A, B, C, D, and E. The student is also given 1.0 mol/L…

A: The solution is as follows:

Q: . Zn(s) + O2(g)

A: ZnO is formed .

Q: Calculate mass recovered.  Calculate percent recovery.  initial mass: 2.09 g watch glass + filter…

A: The question is based on the concept of experimental calculations. we have to calculate mass…

Q: In the blanks below, write two properties of lead: Property 1 Property 2 =

A:

Q: 1 CI 2 F 3 ||| 4 5

A:

Q: 19 Which of the following most accurately models the relationship between compounds and elements? A…

A: Given: 19. Models to determine the relationship between elements and compounds.

Q: d) The atomic mass of silver is 107.8682 u. Determine the mass density of Ag in g/cm.

A: Given, Atomic mass of silver is 1o7.8682 u Lattice constant = 4.09 Ao  Mass density = ?

Q: The radius of a tantalum atom is 142 pm. How many tantalum atoms would have to be laid side by side…

A: Given: Radius of tantalum atom = 142 pm And total distance given = 2.85 mm.

Q: Q21. Compare graphite and diamond

A: Graphite and diamond are allotropic forms of carbon that exist in nature.

Q: BA =0 H₂ Pd/C 1. NaBH4 2. H₂O+

A:

Q: Calculate the amount of material remaining for each of the following substances. 5.25 g Rn-222 (t ½…

A:

Q: The two compounds in A ar The two compounds in Bar the same molecule skeletal isomers functional…

A:

Q: Aluminum alloys are the most used metal alloys by weight. Group of answer choices True False

A: Alluminium alloy most importantly is Al-Si . alluminium alloys widely used in engineering structures…

Q: what are refractory materials?

A: Materials that are inorganic non-metallic materials are called refractories.  They can withstand…

Q: What is the estimated average atomic mass for this element? A. less than 86 amu C. exactly 88 amu…

A: The instrumental method that is used to determine the structure of the chemical compound by…

Q: Given the following data 2 CIF(g) + O2(g) Cl2 O(g) + F20(g) 2 CIF, (9) + 202 (g) C, O(g) + 3F20(g)…

A: Interpretation: From the given reaction, the ∆H of the given equation is to be calculated.

Q: Cl CI

A: The longest chain of carbon atoms is first selected. It is considered as the parent chain. The…

Q: + NaH DMSO Drawing + OH Br

A:

Environmental Pollution

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