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3 years ago

Do you think the ingredients changing into a cake

Chemistry

1 answer:

Nata [24]3 years ago

7 0

It is a chemical reaction because the baking soda or powder undergoes a chemical reaction

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Which of the following is the poorest conductor electricity

mojhsa [17]

Answer:

Fluorine

Explanation:

It is a non-metal does not conduct electricity

5 0

2 years ago

Carbon dioxide is a colorless odorless gas why is it considered a pollutant?

WARRIOR [948]

Carbon dioxide is a gas having chemical formula $CO_{2}$ , a gas which exhaled by humans and inhaled by plants. It is also emitted from the sources such as cement production and combustion of fossil fuels. It is also known as greenhouse gas associated with acidification of ocean.

Carbon dioxide with other gases acts like a blanket of Earth which absorbs infrared radiations emitted from the sun and thus, preventing the escaping of these rays into the outer space which results in the gradual heating of Earth's surface and atmosphere i.e. increase in temperature of Earth. This process is known as Global Warming.

Hence, carbon dioxide is responsible for the increase in warming of the atmosphere i.e. option (D).

7 0

3 years ago

Read 2 more answers

Th e molar absorption coeffi cient of a substance dissolved in water is known to be 855 dm3 mol−1 cm−1 at 270 nm. To determine t

Olegator [25]

Answer : The percentage reduction in intensity is 79.80 %

Explanation :

Using Beer-Lambert's law :

$A=\epsilon \times C\times l$

$A=\log \frac{I_o}{I}$

$\log \frac{I_o}{I}=\epsilon \times C\times l$

where,

A = absorbance of solution

C = concentration of solution = $3.25mmol.dm^{3-}=3.25\times 10^{-3}mol.dm^{-3}$

l = path length = 2.5 mm = 0.25 cm

$I_o$ = incident light

$I$ = transmitted light

$\epsilon$ = molar absorptivity coefficient = $855dm^3mol^{-1}cm^{-1}$

Now put all the given values in the above formula, we get:

$\log \frac{I_o}{I}=(855dm^3mol^{-1}cm^{-1})\times (3.25\times 10^{-3}mol.dm^{-3})\times (0.25cm)$

$\log \frac{I_o}{I}=0.6947$

$\frac{I_o}{I}=10^{0.6947}=4.951$

If we consider $I_o$ = 100

then, $I=\frac{100}{4.951}=20.198$

Here 'I' intensity of transmitted light = 20.198

Thus, the intensity of absorbed light $I_A$ = 100 - 20.198 = 79.80

Now we have to calculate the percentage reduction in intensity.

$\% \text{reduction in intensity}=\frac{I_A}{I_o}\times 100$

$\% \text{reduction in intensity}=\frac{79.80}{100}\times 100=79.80\%$

Therefore, the percentage reduction in intensity is 79.80 %

3 0

3 years ago

Write down the needed and important water in our life?

gizmo_the_mogwai [7]

Answer:

Because 60 percent of our body weight is made up of water. Our bodies use water in all the cells, organs, and tissues, to help regulate body temperature and maintain other bodily functions.

Explanation:

3 0

2 years ago

Read 2 more answers

Calculate the hydroxide ion concentration of a 0.200 M solution of HCIO4

Aleksandr [31]

The concentration of hydroxide ion is 5 $\times$ 10^ − 14 M.

<u>Explanation:</u>

Consider the equilibrium of this acid's dissociation,

H C l O 4 ⇌ H + + C l O 4 -

Moreover, let's assume that H C l O 4 is a strong acid and will fully dissociate.

Hence,

[ H + ] = 0.20 M

Now, recall,

K w = [ H + ] [ O H − ] = 1.0 $\times$ 10 ^− 14

Hence,

⇒ [ O H − ] = K w / [ H + ] = 5 $\times$ 10^ − 14 M.

7 0

3 years ago