Dãy các chất được sử dụng với dung dịch HCl loãng tạo thành sản phẩm có chất khí A. BảO, FE, CaCO3 B. Al, MgO, KOH

C. Na2SO3,CaCO3,Zn D. Zn, Fe2O3,Na2So3

Asap! will give brainiest when a heat wave strikes a region causing more people to run air-conditioning units, electrical demand increases. what needs to be done to meet this increased demand? raising the control rodslowering the control rodsremoving the control rods

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space

Which fossil fuel is mainly used for heating and cooking? a. electricity b. coal c. petroleum d. natural gas