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3 years ago

8

What does a biochemical solar panel have

1 answer:

Viktor [21]3 years ago

4 0

I agree with the person on top have a beautiful day:)

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Advertising claims sometimes state that adding something mechanical to a car's engine will allow it to recover 100 percent of th

Elan Coil [88]

Answer:

second law of thermodynamics.

Explanation:

The second law of thermodynamics deals with interconversion of energy from one form to another. Although energy can be converted from one form to another, this conversion is never 100% efficient because energy is lost in certain ways such as through heat. In a combustion engine, it is not possible to recover the energy from the gasoline 100% since energy must be lost along the way via such means as heat losses. Hence I will be skeptical about such an advert.

4 0

3 years ago

How many dimes could you trade for 360 pesos? $1 = 1500 pesos.

sveta [45]

Answer:

The correct option is (d).

Explanation:

It is given that,

1$ = 1500 pesos

We need to convert 360 pesos into dimes

We can convert 360 pesos to dollars as follows:

$360\ \text{pesos}=\$\dfrac{1}{1500}\times 360\\\\=$0.24$

360 pesos is equal to $0.24

Also, 1 dollar = 10 dimes

We can covert 0.24 dollar to dimes as follows :

0.24 dollar = 10 × 0.24 dimes

0.24 dollar = 2.4 dimes

or

360 pesos = 2.4 dimes

7 0

3 years ago

If element A is in Group 2 and element B is in Group 17, what will be the formula if they bond together?

Anit [1.1K]

Answer:

AB

Explanation:

When combining two elements in different groups, you would just put them together unless you have two or more of each element

4 0

3 years ago

The photos show the AWNSER choices and the question <br> Plz hrlp asap

adell [148]

Answer:

Hydrogen (H) Sulfur(S) and Oxygen(O)

Explanation:

4 0

3 years ago

Read 2 more answers

What is the pH of a buffer that consists of 0.254 M CH3CH2COONa and 0.329 M CH3CH2COOH? Ka of propanoic acid, CH3CH2COOH is 1.3

Shtirlitz [24]

Answer:

4.77 is the pH of the given buffer .

Explanation:

To calculate the pH of acidic buffer, we use the equation given by Henderson Hasselbalch:

$pH=pK_a+\log(\frac{[salt]}{[acid]})$

$pH=-\log[K_a]+\log(\frac{[salt]}{[acid]})$

$pH=-\log[K_a]+\log(\frac{[CH_3CH_2COONa]}{[CH_3CH_2COOH]})$

We are given:

$K_a$ = Dissociation constant of propanoic acid = $1.3\times 10^{-5}$

$[CH_3CH_2COONa]=0.254 M$

$[CH_3CH_2COOH]=0.329 M$

pH = ?

Putting values in above equation, we get:

$pH=-\log[1.3\times 10^{-5}]+\log(\frac{[0.254 M]}{[0.329]})$

pH = 4.77

4.77 is the pH of the given buffer .

7 0

3 years ago