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34kurt
3 years ago
9

Which best explains how photosynthesis is helpful to humans? It reduces the amount of harmful rays released by the sun. It incre

ases the levels of carbon dioxide in the air. It provides oxygen for humans to breathe. It produces proteins, which humans can eat.
Chemistry
2 answers:
masya89 [10]3 years ago
8 0

Answer:I believe that the answer is c

Explanation: photosynthesis gives us oxygen to breath therefore it is helpful to humans

inysia [295]3 years ago
8 0

Answer:

c

Explanation:

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lithium reacts with water, forming lithium hydroxide and highly flammable hydrogen

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1. The attraction between the hydrogen atom in one water molecule and the oxygen molecule in another is
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3 years ago
Calculate the specific heat capacity of a piece of ice if 1.30 kg of the wood absorbs 6.75×104 joules of heat, and its temperatu
Gre4nikov [31]

Answer:

c=2.0769\  \frac{J}{g\ \textdegree C}

Explanation:

-Specific heat capacity is given by the formula:

q=mc\bigtriangleup T

Where:

q is the heat gained or loosed by the substance

m is the mass of the substance

c is the specific heat of the substance

\bigtriangleup T is the change in temperature

#We make c the subject of the formula and substitute to solve for it:

q=mc\bigtriangleup T\\\\c=\frac{q}{m\bigtriangleup T}\\\\\bigtriangleup T=(57-32)\textdegree C=25\textdegree C\\\\\therefore c=\frac{6.75\times 10^4J}{1.3\times 1000\ g\times 25\textdegree  C}\\\\=2.0769 \ \frac{J}{g\ \textdegree C}

Hence, the specific heat capacity of the ice is 2.0769 \frac{J}{g\ \textdegree C}

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3 years ago
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Convert the following to Celsius
Naya [18.7K]

9. (80-32)5/9

48×5/9

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9. (90-32)5/9

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10 (212-32)5/9

180×5/9

20×5

100°C

8 0
3 years ago
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