Một hỗn hợp gồm MgO và Al2O3 có tổng khối lượng là 19,88g -Lấy hỗn hợp trên cho tác dụng với 200ml dd HCl. Sau phản ứng làm bay hơi thu được 47,38g chất rắn.
-Lấy hỗn hợp trên cho tác dụng với 400ml dd HCl có cùng nồng độ. làm bay hơi dd thu được 50,68g chất rắn
Tính nồng độ mol của dd HCl đã dùng

Microtubular fibers that assist in the movement of chromosomes during nuclear division in conjunction with proteins, makes up the small and large organelle pieces that assemble prior to translation three-base nucleotide sequence that can complementarily pair with the functional transcript, allowing a particular material to be brought to a ribosome particular time in the cell cycle when the cell’s systems determine if the cellular conditions are appropriate to continue through the cycle time in the cell’s cycle when proteins are made and organelles are duplicated enzyme that allows proper nucleotide bonding during transcription specific dna sequence which will initiate gene transcription division of the cell’s cytoplasm specific bond that forms between two amino acids when a carboxyl group binds to a amino group three-base sequence that does not code for a particular amino acid a paired organelle which facilitates the formation of movement microtubules time in the cell’s cycle when the microtubular structures exert an equal pressure on the cell’s genetic material

About 70 percent of the earth's surface is water-covered, and about 96.5 percent of all earth's water is salt water. identify the watery feature on earth that is made of freshwater rather than salt water. a) bay b) glacier c) ocean d) sea it is not incomplete this is the true question

Can someone me with questions 15 to 17 plz.