Which of the following will have same number of molecules at STP. a)280cm3 of CO2 and 280cm3 of N2O. B)44g of CO2 and 11.2dm3 CO c)11.2dm3 of O2 and 32g of O2 d)28g of N2 and 5.6dm3 of oxygen PLEASE EXPLAIN IN DETAIL :))

Consider three unlabeled bottles, each contain small pieces of one of the following metals. - magnesium - sodium - silver the following reagents are used for identifying the metals. - pure water - a solution of 1.0 molar hcl - a solution of concentrated hno3 (a) which metal can be easily identified because it is much softer than the other two? describe a chemical test that distinguishes this metal from the other two, using only one of the reagents above. write a balanced chemical equation for the reaction that occurs. (b) one of the other two metals reacts readily with the hcl solution. identify the metal and write the balanced chemical equation for the reaction that occurs when this metal is added to the hcl solution. use the table of standard reduction potentials (attached) to account for the fact that this metal reacts with hcl while the other does not. (c) the one remaining metal reacts with the concentrated hno3 solution. write a balanced chemical equation for the reaction that occurs. (d) the solution obtained in (c) is diluted and a few drops of 1 m hcl is added. describe what would be observed. write a balanced chemical equation for the reaction that occurs.

How have the greenhouse gasses increased from the year 2000 to 2018

If 22.5 liters of oxygen reacted with excess of hydrogen, how many liters of water vapor could be produced?