Air pollution may have a greater effect on health than on atmospheric temperature.

1 answer:

8 0

Yes it is true, Because we are breath in air in the form of smoke and very small practical plagued our lungs, Which are very danger for our body. Computerized tomography imaging studies on the bodies of ancient mummies have detected evidence of pneumonia, emphysema and many types of asthma problem occur in our body .

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How much energy is required to heat 40g of water from -7 degrees Celsius to 108 degrees Celsius (Lf= 335,000J/Kg for ice)

solniwko [45]

The energy required to heat 40g of water from -7 c to 108 c is
1541000 joules

calculation

Q(heat)= M( mass) x c(specific heat capacity) xdelta t( change in temperature)

M= 40g= 40/1000= 0.04 Kg
C= 335,000 j/kg/c
delta T ( 108 --7= 115 c)

Q is therefore = 0.04 g x 335000 j/kg/c x 115 c = 1541,000 joules

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3 years ago

Which of the following is a reactant in photosynthesis?

svet-max [94.6K]

Answer:

This would be Water

Explanation:

The reactants for photosynthesis is light or energy from the sun, carbon dioxide which is what plants breath, and chlorophyll for channeling the energy of the sun into chemical energy.

the rest of the answers is the products of photosynthesis not the reactants.

If you have any questions feel free to ask in the comments - Mark

ALSO Happy Valentines Day ❤

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3 years ago

HELP HELP HELP!! Explain the various factors that impact the solubility of substances in water.

Agata [3.3K]

Explanation:

There are two direct factors that affect solubility: temperature and pressure. Temperature affects the solubility of both solids and gases, but pressure only affects the solubility of gases.

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3 years ago

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Mountain-building is a ________ process on Earth. A. destructive B. constructive

serg [7]

I'm pretty sure it's B)constructive

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3 years ago

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? Answer the question below. Type your response in the space provided. What volume of a 2.5 M stock solution of acetic acid (HC2

Novay_Z [31]

Data:
$M_{concentrated} = 2.5\:mol$
$V_{concentrated} = ?$
$M_{dilute} = 0.50\:mol$
$V_{dilute} = 100\:mL\to0.100\:L$

Formula: Dilution Calculations

 $M_{concentrated} * V_{concentrated} = M_{dilute} * V_{dilute}$

Solving:


$M_{concentrated} * V_{concentrated} = M_{dilute} * V_{dilute}$
$2.5 * V_{concentrated} = 0.50 * 0.100$
$2.5V_{concentrated} = 0.05$
$V_{concentrated} = \frac{0.05}{2.5}$
$\boxed{\boxed{V_{concentrated} = 0.02\:L\:or\:20\:mL}} \end{array}}\qquad\quad\checkmark$

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3 years ago