2CO(g)+O2(g)=2CO2(g)△H=﹣566kJ/mol;
Na2O2(s)+CO2(g)=Na2CO3(s)+ 12 O2(g)△H=﹣226kJ/mol
根据以上热化学方程式判断,下列说法正确的是( )
如图所示为一物体沿南北方向(规定向北为正方向)做直线运动的速度﹣时间图象,由图可知( )
—I will visit my grandparents in Beijing next month. Could you please tell me______?
—Oh, you may take the subway there.
假如被减数和减数都增加7.8,那么差( )