When the following equation is balanced, the coefficients are __________. Al(NO3)3 + Na2S → Al2S3 + NaNO3答案:2, 3, 1, 6A combination of sand, salt, and water is an example of a _
1.A mixture of two gases was allowed to effuse from a container. One of the gases escaped from the container 1.43 times as fast as the other one. The two gases could have been __________.A:O2 and Cl2B:Cl2 and SF6C:CO and SF6D:CO and CO2E:
第一章测试1.Solids have a __________ shape and are not appreciably __________.A:definite, compressibleB:indefinite, compressibleC:indefinite, incompressibleD:definite, incompressibleE:sharp, convertible