Answer:
the United States and the Soviet Union.
Explanation:
Basically we were in toe to toe with the russians for space explorations like who's gonna get to space first or moon or do such explorations
Answer: Chlorophyll is a green photosynthetic pigment found in plants, algae, and cyanobacteria.
Chlorophyll absorbs mostly in the blue and to a lesser extent red portions of the electromagnetic spectrum, hence its intense green color.
Green substance in producers that traps light energy from the sun, which is then used to combine carbon dioxide and water into sugars in the process of photosynthesis Chlorophyll is vital for photosynthesis, which helps plants get energy from light.
Chlorophyll molecules are specifically arranged in and around pigment protein complexes called photosystems, which are embedded in the thylakoid membranes of chloroplasts.
Request: It would really help if you could make me brainliest
Answer: whole number ratios
Explanation:
Element is a pure substance which is composed of atoms of similar elements.It can not be decomposed into simpler constituents using chemical reactions.Example: Copper 
Compound is a pure substance which is made from atoms of different elements combined together in a fixed ratio by mass. It can be decomposed into simpler constituents using chemical reactions. Example: water 
Thus the ratio of hydrogen and oxygen is 2: 1 and is a whole number ratio.
<span>Converting from mass (grams) to moles: Divide your initial mass by the molar mass of the compound as determined by the periodic table.<span>Converting from moles to mass (grams): </span>Multiply your initial mole value by the molar mass of the compound as determined by the periodic table.<span>Converting from volume (liters) to moles: </span>Divide your initial volume by the molar volume constant, 22.4 L.<span>Converting from moles to volume (liters): </span>Multiply your mole value by the molar volume constant, 22.4L.<span>Converting from particles (atoms, molecules, or formula units) to moles: </span>Divide your particle value by Avogadro’s number, 6.02×1023. Remember to use parentheses on your calculator!<span>Converting from moles to particles (atoms, molecules, or formula units): </span>Multiply your mole value by Avogadro’s number, 6.02×1023.<span>Mole-to-mole conversions: </span>Use the coefficients from your balanced equation to determine your conversion factor. Be sure your units cancel out so you end up with the correct mole value.</span>
Answer:
A compound is a pure substance.
