Roberto lives inland in North America. He measured the temperature and precipitation during one winter month and calculated the average daily temperature and precipitation amount for each week. He recorded his results in a chart. Week Temperature Precipitation 1 0 degrees C 0 cm 2 4 degrees C 0 cm 3 7 degrees C 0 cm 4 15 degrees C 5.00 cm The front that moved over Roberto's area the last week of the month was humid. Based on the chart and your knowledge of fronts, what kind of front would this most likely be?

For each of the following types of reactions, write a general reaction formula in the symbolic form—for example, a + b → ab. single-displacement double-displacement synthesis decomposition

One does not belong why? ice, gold ,wood ,diamond and table salt

For a research project, a student decided to test the effect of the lead(ii) ion (pb2+) on the ability of salmon eggs to hatch. this ion was obtainable from the water‐soluble salt, lead(ii) nitrate, which the student decided to make by the following reaction. pbo(s) + 2 hno3(aq) → pb(no3)2(aq) + h2o losses of product for various reasons were expected, and a yield of 86.0% was expected. in order to have 5.00 g of product at this yield, how many grams of pbo should be reacted? (assume that sufficient nitric acid, hno3, would be used.)