All categories

3 years ago

Help me please TwT. I really need it TwT

Chemistry

1 answer:

lbvjy [14]3 years ago

5 0

Answer:

The air moves to the low pressure system creating wind.

Hope this helps! :)

You might be interested in

Calculate hydrochloric acid (umol)in 200 ul of a<br> 0.5173Msolution of acid?

strojnjashka [21]

<u>Answer:</u> The moles of hydrochloric acid is $1.0346\times 10^{-4}\mu mol$

<u>Explanation:</u>

To calculate the molarity of solution, we use the equation:

$\text{Molarity of the solution}=\frac{\text{Moles of solute}}{\text{Volume of solution (in L)}}$

Or,

$\text{Molarity of the solution}=\frac{\text{Micro moles of solute}\times 10^6}{\text{Volume of solution (in }\mu L)}}$

We are given:

Molarity of solution = 0.5173 M

Volume of solution = $200\mu L$

Putting values in above equation, we get:

$0.5173M=\frac{\text{Micro moles of HCl}\times 10^6}{200\mu L}\\\\\text{Micro moles of HCl}=1.0346\times 10^{-4}\mu mol$

Hence, the moles of hydrochloric acid is $1.0346\times 10^{-4}\mu mol$

7 0

3 years ago

6. A solution of CuSO4 is electrolyzed for 10 minutes with a current of 1.5 amperes. What is the mass of copper deposited at the

vladimir2022 [97]

The mass of Copper deposited at the cathode : 0.296 g

<h3>Further explanation</h3>

Given

time = t = 10 min=600 s

current = i = 1.5 A

F = 96500 C

charge Cu=+2

Required

The mass of Copper

Solution

Faraday's Law

$\tt W=\dfrac{e.i.t}{96500}$

e = Ar/valence(valence Cu=2, Ar=63.5 g/mol)

Input the value :

$\tt W=\dfrac{63.5/2\times 1.5\times 600}{96500}\\\\W=0.296~g$

5 0

3 years ago

8. Which of the following are reasons why Index fossils are chosen for determining ages of rocks? Select all that apply .

igomit [66]

Answer:

B. Distributed over a very wide range

D. Limited life existence in geologic time.

Explanation:

Index fossils are very unique fossils that helps in determining the relative ages of rocks and biostratigraphic correlation. They are usually called guide fossils.

Fossils are the preserved remains of dead organisms found in rocks.
Index fossils are a special class of fossils with the following properties;

They are widely distributed.
They have a short stratigraphic range.
They show rapid evolution trends

4 0

3 years ago

Read 2 more answers

What is the predicted order of first ionization energies from highest to lowest for lithium (Li), sodium (Na), potassium (K), an

PSYCHO15rus [73]

U have it in the right order

4 0

3 years ago

Read 2 more answers

A 0.211 g sample of carbon dioxide, CO2, has a volume of 560 mL and a pressure of 429 mmHg whats the temperature of the gas in K

SCORPION-xisa [38]

The temperature of the gas sample is 813 K.

<u>Explanation:</u>

We have to use the ideal gas equation to find the temperature of the gas sample.

The ideal gas equation is PV = nRT

Pressure, P = 429 mm Hg = 0.56 atm

Volume, V = 560 mL = 0.56 L

R = gas constant = 0.08205 L atm mol⁻¹K⁻¹

Mass = 0.211 g

Molar mass of carbon di oxide = 44.01 g / mol

Moles, n = $$\frac{given mass}{molar mass} = \frac{0.211 g}{44.01 g/mol}$

= 0.0047 mol

Now, we have to plugin the above values in the above equation, we will get the temperature as,

$$T= \frac{PV}{nR}$

T = $$\frac{0.56 \times 0.56}{0.08205 \times 0.0047}$

= 813 K

So the temperature of the gas sample is 813 K.

5 0

3 years ago