Đốt cháy hoàn toàn m gam hợp chất hữu cơ A( A chỉ chứa C, H,N và A<50)bằng một lượng không khí vừa đủ thu được 8,96 lít CO2;12,6 gam H2O;69,44lít N2( ở đktc). Xác định m và CTPT của A, biết trong không khí N2 chiếm 80% về thể tích

How does a large body of water, such as the ocean, influence climate?

If a straight-chain hydrocarbon is a gas at room temperature, how many carbon atoms will it have? a. 6 carbon atoms b. 12 carbon atoms c. 24 carbon atoms d. 3 carbon atoms

Air pressure is measured in pascals. for a professional american football game, the ball should be inflated to about 90,000 pascals. scientists studied the effects of air temperature on the pressure inside american footballs by taking these steps: 1. prepare 100 footballs. 2. measure each football's air pressure. 3. divide footballs into 10 groups. 4. place the groups in different lockers cooled to different air temperatures. 5. after 12 hours, remove the footballs from lockers. 6. measure each football's pressure again. 7. compare the new pressures to the starting pressures. what two terms best describe the variable "air pressure inside the football" in this experiment? independent, qualitative independent, quantitative dependent, qualitative dependent, quantitative