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3 years ago

Why is it necessary for us to keep our sence organ clean and healthy.

Chemistry

1 answer:

Feliz [49]3 years ago

5 0

Answer:

it is necessary to keep our sense organ clean and healthy for if don't clean our sense organ clean we may suffer from many disease like if we don't clean eyes we can't see anything, if we don't clean ear we can't listen anything, and if we don't clean nose it hard for breathing, and if we don't cleanour tounge should be dry and become our breathe smell is very bad, and if we don't clean skin we may suffer from many disease and that may we get cancer also.

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A hot air balloon is filled with 15 moles helium gas and 5 moles nitrogen gas. What is the volume of the balloon at 1.01 atm and

kvasek [131]

Given:

Moles of He = 15

Moles of N2 = 5

Pressure (P) = 1.01 atm

Temperature (T) = 300 K

To determine:

The volume (V) of the balloon

Explanation:

From the ideal gas law:

PV = nRT

where P = pressure of the gas

V = volume

n = number of moles of the gas

T = temperature

R = gas constant = 0.0821 L-atm/mol-K

In this case we have:-

n(total) = 15 + 5 = 20 moles

P = 1.01 atm and T = 300K

V = nRT/P = 20 moles * 0.0821 L-atm/mol-K * 300 K/1.01 atm = 487.7 L

Ans: Volume of the balloon is around 488 L

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3 years ago

What volume of 0.128 M HCl is needed to neutralize 2.87 G of Mg(OH)2?

qaws [65]

V= .768L= 76.8ml HCL

4 0

3 years ago

Which of these space missions visited the moon several times?

sesenic [268]

Answer:

Voyager 1

Explanation:

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3 0

2 years ago

Read 2 more answers

Can someone help me on this

xz_007 [3.2K]

155,500

I did this to the best of my ability. I have a hard time comprehending things sometimes so I’m so so so sorry if it’s wrong

8 0

2 years ago

How many 20.0-g ice cubes are required to absorb 47.0 kJ from a glass of water upon melting?

Sati [7]

Hello!

The number of 20-g ice cubes required to absorb 47 kJ from a glass of water upon melting is 7 icecubes

Why?

We are going to clear from the equation of the released heat, the mass of ice (m). The specific latent heat of fusion of ice is 336 kJ/kg:

$Q=m*L\\ \\ m=\frac{Q}{L}=\frac{47 kJ}{336 kJ/kg}=0,1399 kg=139,88 g\\ \\ 139,88g*\frac{1 icecube}{20g}=6,99=7icecubes$

So, 7 ice cubes are required to absorb that amount of heat from the glass of water.

Have a nice day!

3 0

3 years ago

Why is it necessary for us to keep our sence organ clean and healthy.​

Why is it necessary for us to keep our sence organ clean and healthy.