Answer:
Angiosperms are vascular plants. ... Unlike gymnosperms such as conifers and cycads, angiosperm's seeds are found in a flower. Angiosperm eggs are fertilized and develop into a seed in an ovary that is usually in a flower. The flowers of angiosperms have male or female reproductive organs.
Answer:
In the 1920s, Hubble was among the first to recognize that there is a universe of galaxies located beyond the boundaries of our Milky Way. During the 1920s, Edwin Hubble observed stars that vary in brightness in a patch of light known at the time as the Andromeda nebula.
Answer:
table A
Explanation:
its table A because it requires less force push. the less force used the less friction there is.
the less friction there is the more smooth a surface is.
Answer: increase number of collisions
Explanation:
Decreasing the volume increases the likelihood of particles interacting more often.
<h3><u>Answer;</u></h3>
B: The volume of hydrogen produced would be the same.
<h3><u>Explanation;</u></h3>
Ca(s) + 2 H2O(l) → Ca(OH)2(aq) + H2 (g)
- From the reaction;<u><em> the mole ratio of calcium to water is 1 : 2; which means 1 mole of calcium requires 2 moles of water to produce 1 mole of hydrogen gas. </em></u>
- Therefore; <em><u>changing the mass of water used will not affect the amount of hydrogen gas produced since the amount of hydrogen gas produced depends on the amount of calcium used. In this case, water is in excess, because 0.1 moles of calcium requires only 0.2 moles of water which is 3.6 g.</u></em>
- Hence; <em>since the amount of calcium remains the same the amount of hydrogen gas produced will remain the same.</em>