Wood when burned in air, will ______ be part of a heterogeneous mixture be part

Question

Wood when burned in air, will ______ be part of a heterogeneous mixture be part of a homogeneous mixture be changed into other substances by chemical means interact with other elements to form compounds to be pure substance Which of the following are chemical processes? Rusting of a nail freezing of water decomposition of water into hydrogen and oxygen gases compression of oxygen gas 2, 3, 4 1, 3, 4 1, 3 1, 2 2, 4 Osmium has a mass of 24.914 lbs. What is the density of 0.1321 gallons of osmium? Express density in g/cm^3. 22.60 11, 300 2.212 221.24 2.03 times 10^3 How many cubic centimeters of air are in a room that measures 1200 in times 110 in and has 960 in ceiling: 2.49 times 10^4 92.8 24.918 2.68 times 10^7 2.49 times 10^10 ________ reside outside the atomic nucleus and have a net positive charge. Protons, neutrons Electrons, neutrons Protons, electrons none of the above Neutrons In the periodic table, the vertical columns are called ______ and the horizontal called _______ of elements. octaves, groups families, periods periods, families periods, octaves rows, groups

Explanation / Answer

9. Wood burn in air is chemical reaction

C.be changed into other substance by chemical change

10. C. 1,3

11. V = 0.1321gallon

           = 0.1321*3785.4 = 500Cm3

     1lb = 453.6g

       m   = 24.914lbs = 24.914*453.6g = 11300.9g

density   = m/v = 11300.9/500 = 22.6g/cm3

12. v = 1200in*110in*960in

         = 1200*2.54cm*110*2.54cm*960*2.54cm

         = 2076568750cm3   = 2.68*109cm3

13. A

14. B

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