Tungsten trioxide (wo3) has a rich yellow color and is often used as a pigment in ceramics and paints. in order to test a ceramic vase for its wo3 content, a 10.22 g sample of the vase was ground and reduced with pb(hg) to convert any wo3 to w3 . the resulting w3 was transferred to 500.0 ml of 1.00 m hcl. a 100.00 ml aliquot of the hcl solution required 14.66 ml of 0.08808 m potassium permanganate (kmno4) to reach the purple endpoint. a blank required 0.26 ml. balance the reaction below and determine the percent wo3 in the ceramic sample. mno4 + w + h > mn + wo2 + h2o

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? a. the balloons both rise. the cold balloon is larger than the warm balloon. b. the balloons rise at the same rate. both balloons are the same size. c. the warm balloon expands and rises. the cold balloon shrinks and sinks. d. the cold balloon expands and rises. the warm balloon shrinks and sinks.

In pea plants, the allele for tallness (t) is dominant to the allele for shortness (t). in the cross between a tall pea plant and a short pea plant shown below, what is the probability that the resulting offspring will be tall? whats the percent

Ethanol (c2h5oh) is produced from the fermentation of sucrose in the presence of enzymes. c12h22o11(aq) + h2o(g) 4 c2h5oh(l) + 4 co2(g) determine the theoretical yield and the percent yields of ethanol if 680. g sucrose undergoes fermentation and 326.5 g ethanol is obtained. theoretical _ g _ percent %