Es
10 ml of a 3% hydrogen peroxide solution is added to five test tubes. as the hydrogen peroxide decomposes to produce
oxygen gas, the rate of oxygen production is rated on a scale of 0 - 5,0 meaning "no oxygen" and 5 meaning 'fast
to the other four test tubes of hydrogen peroxide, five drops of additional solutions are added. the solutions are indicated in the
data table as well as the rate of oxygen production for each
based on the data, what is the most appropriate conclusion for this experiment?
iron compounds are always used as catalysts,
reaction rate is always increased by iron compounds.
increasing the temperature increases the rate of decomposition
d)
iron compounds are a catalyst for the decomposition of hydrogen peroxide.

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.

in a chemical reaction, the atoms and molecules produced by the reaction are called products. no new atoms are created, and no atoms are destroyed. in a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.