Aluminium has a density of 2.70 g/cm3. How many moles of aluminum are in a 13.2 | cm block of the metal substance?

Elemental phosphorus is used in the semiconductor industry. It can be obtained from an ore called fluoroapatite via reaction with SiO2 and C: 4 Cas (PO4)3 F + 18 SiO2 + 30 C --› 3 PA + 30 CO + 18 CaSiO3+ 2 CaF2 Suppose a particular semiconductor production plant requires 1300 kg of P4. If the recovery of P4 from this reaction is 78% efficient, what mass of fluoroapatite is needed?

Elemental phosphorus is used in the semiconductor industry. It can be obtained from an ore called fluoroapatite via reaction with SiO2 and C: 4 Cas (PO4)3F + 18 SiO2 + 30 C → 3 P4 + 30 CO + 18 CaSiO3 + 2 CaF2 Suppose a particular semiconductor production plant requires 2100 kg of P4. If the recovery of P, from this reaction is 79% efficient, what mass of fluoroapatite is needed? Mass = kg Submit Answer Try Another Version 10 item attempts remaining

5. Why is t2 a canman CXidcition Stete For the transition elements" Ction Stete 7or the

OWLV2 Online teachin X Cthe Deep Blue Compound ( + https://cvg.cengagenow.com/ilm/takeAssignment/takeCovalentActivity.do?locator%=Dassignment-take&takeAssignmentS [References] The deep blue compound Cu(NH3)4SO4 is made by the reaction of copper(II) sulfate and ammonia. CUSO4 (aq) +4 NH, (aq) → Cu(NH3)4SO4 (aq) If you use 27.0 g of CuSO4 and excess NH3, what is the theoretical yield of Cu(NH3),SO, ? g Cu(NH3)4SO4 If you isolate 22.0 g of Cu(NH3)4SO4, what is the percent yield of Cu(NH3)4SO4? Submit Answer Try Another Version 8 item attempts remaining Show Hint search

Use the reaction below to calculate the number of Al₂ Os that could be formed if 12.5 g 02 with aluminum grams of Feuct completies GAL + 30₂ 72A12 03

Q3c(i) & c(ii)

What is the percentage of chromium in the compound,potassium dichromate, K2Cr2O7?(At. Wt. K=39, Cr=52, O=16)

10 (c) An element T has a melting point of 30°C and a boiling point of 2440 °C. It conducts electricity at room temperature. It burns in oxygen to form an oxide with formula T₂O₂ which can react with both acids and bases. T also forms a compound with fluorine, which has a high melting point and conducts electricity in molten form. The approximate relative atomic mass of T is 70. (1) What type of oxide is T,O,? (i) Give two properties that indicate that T is probably a metal. 1. 2 (iii) Predict the formula for the fluoride of T E [1] [2] N [1] (iv) What are the products of the electrolysis of the molten fluoride of using inert electrodes? and (v) In which group and period of the Periodic Table will T be placed? group period 21 2) (vi) Write the symbol of the element in the Periodic Table which most closely resembles T.

A sample of 0.2500 g of an antimony alloy is taken and converted into Sb2O4 by appropriate processes. Since the product brought to constant weight is 0.1305 g, calculate the percentage of antimony in the alloy (Sb = 121g / mol, 0 = 16 g / mol).