A:时条件改变引起的变化是平衡向正反应方向移动
B:若改变的条件是压强,则W、Z均为气体,X、Y中只有一种为气体
C:若改变的条件是温度,则该反应的正反应是吸热反应
D:若改变的条件是浓度,改变的方法是减小X、Y的浓度
物质的用途和性质密切相关。下列用途主要是利用其化学性质的是()
Sam's parents took her to the World Park last week. He saw Big Ben, the Tower Bridge, Disneyland in America, the CN Tower, Niagara Falls and the Sydney Opera House. His father told her Big Ben and the Tower Bridge are in London. Her mother told her Niagara Falls is in Canada and the Sydney Opera House is in Australia. He learnt about many things of the famous places around the world.