Cho m gam hỗn hợp Na và Al có tỉ lệ mol 4:3 vào nước được dung dịch X và 29,12 lit H2 đkc. Giá trị của m là A. 17,3g.
B. 34,6g.
C. 8,65g.
D. 5,0g.

Solar energy is energy from the sun that is converted into thermal or energy. a. nuclear b. mechanical c. electrical d. chemical

Select the correct answer how does the heat content of the reaction change in the process of photosynthesis when a glucose molecule is formed? ca the value of is negative the value of qis positive the value of a remains constant the value of a decreases the value of equals zero e

What is the molar mass of a gas that has density of 2.054 g/l