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gladu [14]
3 years ago
14

How does coffee keep you awake?

Chemistry
2 answers:
MrRa [10]3 years ago
7 0

Answer:

Caffeine

Explanation:

Caffeine is packed with protein that provides energy

ivanzaharov [21]3 years ago
4 0

Coffee keeps you awake due to the caffeine in it. Caffeine is considered a psychoactive drug which energizes people by releasing a chemical in the body.

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At what time of the year can the sun be found at the zenith
Step2247 [10]

Answer: The Sun Could Be Seen Once during the year when north of the equator.

3 0
3 years ago
In the mathematical equation showing that volume (V) divided by temperature (T) remains equal to a constant (k), volume and temp
NARA [144]

Answer:

Directly  

Explanation:

\dfrac{V}{T} = k

If V increases, then T must also increase to keep the same ratio.

If V decreases, then T must also decrease to keep the same ratio.

V and T are directly proportional, because a change in one always causes a change in the other and the changes are in the same ratio. The constant k is called the proportionality constant.

7 0
4 years ago
7. Which of the following best describes vinegar?
stepladder [879]
I think the answer is c
6 0
3 years ago
Escribe aquí algo que consideres que requiere un balance para que se lleve a cabo correctamente​
Solnce55 [7]

Answer:

Algo importante sobre el balance de una reacción química es la ley de la conservación de la masa que establece que la masa no se crea ni se destruye sólo se transforma de modo que en una reacción química la suma de la masa de los reactivos debe ser igual a la suma de la masa de los productos.

Por ejemplo: La fermentación de la glucosa es una reacción química balanceada que da como resultado etanol y dióxido de carbono.

C₆H₁₂O₆ → 2C₂H₆O +2CO₂

Calculando la masa de los reactivos y productos, se debe cumplir la ley de la conservación de la masa:

C₆H₁₂O₆= 6*12+12*1+6*16=180 g/mol

C₂H₆O= 2*12+6*1+16=46 g/mol

CO₂=12+2*16=44 g/mol

C₆H₁₂O₆ → 2C₂H₆O + 2CO₂

180 g/mol = 2*46 g/mol + 2*44 g/mol

180 g/mol = 92 g/mol + 88 g/mol

180 g/mol = 180 g/mol

8 0
3 years ago
True or False? Changes in temperature, pressure and volume affect the behavior of gases more than they affect solids and liquids
Flauer [41]

Answer:

True

Explanation:

3 0
4 years ago
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