Which coefficients balance this equation? _CH4 + _O2 -> _CO2 + _H2O A. 1, 1, 1, 1 B. 1, 1, 2, 1 C. 1, 2, 1, 2 D. 2, 1, 2, 1
ICE Princess25 [194]
C. 1,2,1,2
1 CH4+ 2 O2= 1 CO2+ 2 H20.
when balancing, you need to make sure that each side has the same number of each atom. The reason for this is to abide by the law of conservation of mass; essentially you can't have more or less than you put in the equation.
When you put the coefficients of C. into the equation you have a total of 2 carbon atoms on each side, 4 hydrogen atoms, and 4 oxygen atoms.
They are markers because their blood level can tell about the human's metabolism, and can predict diseases.
Cholesterol is a natural fat essential to the body. It allows, among other things, the synthesis of vitamin D or bile. It is a constituent of the wall of our cells. Finally, it is part of many hormones, such as sex hormones.Cholesterol has been identified as responsible for certain cardiovascular diseases such as myocardial infarction and stroke.
Insulin is a hormone naturally produced by the pancreas in response to an increase in the level of sugar (glucose) in the blood.Insulin synthesis failure or insulin resistance leads to diabetes, a disease that affects the quality of life of the patient as it will be dependent on daily intake of antidiabetic and insulin, and will be required to adapt a diet. dietetic
Umbilical vein transports blood rich in oxygen and nutrients from the placenta to the fetus. The unpaired umbilical vein is a vein present during fetal development and it transports the nutrient- and oxygen-rich blood from the placental villi via the umbilical cord to the embryo. The umbilical vein is connected to the two intraembryonic umbilical veins.
<u>ANSWER:</u>
Scientists are now of the opinion that life originated from inorganic molecules.
<u>EXPLANATION:</u>
- Scientists now think that "life on earth" originated around 3.5 to 3.9 million years ago.
- According to scientists, "building blocks of life"(amino acids) were first formed and these combined to form the compounds essentially needed for life on earth.
- There are many scientists who also think that the first organic molecules on earth came from meteorites.
- There are however many scientists who also think that some of the "building blocks of life" may have been formed abiotically on earth.
