pilottayeng

Many metals are not found in nature in their elemental form, but inminerals which are a combination of elements. The metal isextracted by various means from these minerals. Sphene is a mineralcontaining titanium (Ti) and has the empirical formula CaTiSiO5.Calculate the proportion by mass of titanium in Sphene. Give youranswer as a percentage to 2 significant figures. You will need toconsult the Periodic Table in Book 4, page 48, to obtain therelative atomic masses of the elements in the mineral.

The proportion by mass of titanium in CaTiSiO5 is

Many metals are not found in nature in their elemental form, butin minerals which are a combination of elements. The metal isextracted by various means from these minerals.

Chromite is a mineral containing chromium (Cr) and has theempirical formula FeCr₂O₄. Calculate theproportion by mass of chromium in Chromite. Give your answer as apercentage to 2 significant figures.

The proportion by mass of chromium in FeCr₂O₄is %.

What is the reporter in film responsible for?

Checkpoint 4

• Exercise PART A. Please match each subject with the most logical form.

1 Mi madre: 2. Mis amigos:

tengo                              tengo

tienes                             tienes

tiene                              tiene

tenemos                            tenemos

tienen                             tienen

3 Yo: 4. Nuestros amigos:

tengo                              tengo

tienes                             tienes

tiene                              tiene

tenemos                            tenemos

tienen                             tienen

5 Nuestra clase: 6. Mi novia:

tengo                              tengo

tienes                             tienes

tiene                              tiene

tenemos                            tenemos

tienen                             tienen

7 Tú: 8. Tu sobrina:

tengo                              tengo

tienes                             tienes

tiene                              tiene

tenemos                            tenemos

tienen                             tienen

9 Ud.: 10. Uds.:

tengo                              tengo

tienes                             tienes

tiene                              tiene

tenemos                            tenemos

tienen                             tienen

Phases of Matter-Comic Strip

A 6.22 kg mixed-mineral sample contains chromite (FeCr2O4) as the only chromium-bearing ore. The sample is subjected to an industrial process, using a ferrosilicon alloy as a reducing agent, which quantitatively converts all of the chromium into 11.9 kg of a ferrochrome alloy (stainless steel) which is 18.9% Cr by mass.

What is the percentage of chromite (FeCr2O4) in the original sample?

Draw the Lewis structure for vinyl bromide C2H3Br. Be certain you include any lone pairs.

What is a good estimate for the mass of a goat?

Definition of territory