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katen-ka-za [31]
3 years ago
6

Why does the moon appear to move across the sky

Chemistry
1 answer:
arsen [322]3 years ago
3 0
Hello the moon is not moving but it is going through the lunar cycle. The picture is a blood moon

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During the water cycle, water is evaporated from the Earth and becomes water vapor. Water vapor then condenses in the air to
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D. What do all of the molecules in the table have in common?
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A student heats 2.796g of zinc powder with 2.414g of sulphur.He reported that he obtained 4.169g of zinc sulfide and recover 1.0
Sati [7]

Answer:

The mass of reactants and products are equal hence the reaction obeys law of conservation of mass

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The law of mass conservation states that for a closed system to all transfer of mass, the mass of system must remain constant over time. This means for a chemical reaction, the mass of reactants must equal the mass of products.

if 2.796g of Zn reacts with 2.414g of sulphur to produce 4.169g of ZnS ad 1.041g of unreacted sulphur, then it means that accorfing to the law of mass conservation, the mass of reactants (zinc and sulphur), must be equal to mass of products (zinc sulfide and unreacted sulphur)

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Mass of products = 4.169g + 1.041g=5.21g

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3 years ago
what Is the number of photons in one J of red light (650 nm) greater than, equal to, or less than the number of photons in one J
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