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3 years ago

What are the enviromental factors of cornavirus

Chemistry

1 answer:

maksim [4K]3 years ago

4 0

Well, I know one. A positive: decreasing pollution because most people are in quarantine and not outside.

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Can someone help me understand what 1b is asking and how to answer it?

icang [17]

The question is basically asking what is happening to the energy (that is in the form of heat) when it is being absorbed by an object. The energy being absorbed from the heat source is being turned into kinetic energy. This can be explained by temperature change. As you add more heat to an object, the temperature rises. Since temperature is the average kinetic energy of all of the molecules in an object, we can say that as temperature rises so does the kinetic energy of the molecules in the object. Due to the fact that heat is causing the temperature to increase, we can say that the energy from the heat is being turned into kinetic energy.

I hope this helps. Let me know in the comments if anything is unclear.

5 0

3 years ago

How many moles of calcium (Ca) atoms are there in 77.4 g of Ca?

Vinvika [58]

Lar mass of Ca = 40.08 grams/mole 77.4 g Ca * ( 1 mole Ca/ 40.08 ... n = m / M 1mol Caweights 40 gmol-1 n = 77,4 / 40 = 1.93 mol.

8 0

3 years ago

Read 2 more answers

2. A sample of neon gas has a volume of 87.6 L at STP. How many moles are present?

PSYCHO15rus [73]

Answer:

3.91 moles of Neon

Explanation:

According to Avogadro's Law, same volume of any gas at standard temperature (273.15 K or O °C) and pressure (1 atm) will occupy same volume. And one mole of any Ideal gas occupies 22.4 dm³ (1 dm³ = 1 L).

Data Given:

n = moles = ???

V = Volume = 87.6 L

Solution:

As 22.4 L volume is occupied by one mole of gas then the 16.8 L of this gas will contain....

= ( 1 mole × 87.6 L) ÷ 22.4 L

= 3.91 moles

<h3>2nd Method:</h3>

Assuming that the gas is acting ideally, hence, applying ideal gas equation.

P V = n R T ∴ R = 0.08205 L⋅atm⋅K⁻¹⋅mol⁻¹

Solving for n,

n = P V / R T

Putting values,

n = (1 atm × 87.6 L)/(0.08205 L⋅atm⋅K⁻¹⋅mol⁻¹ × 273.15K)

n = 3.91 moles

Result:

87.6 L of Neon gas will contain 3.91 moles at standard temperature and pressure.

7 0

3 years ago

Everything in outer space including stars, planets, and galaxies

slega [8]

Answer:

Universe.

Explanation:

Biosphere is just a planet. Solar system contains planets and star. Galaxy holds multiple solar systems only. Universe hold everything, biospheres, solar systems, and galaxies. I hope this helps :D

5 0

3 years ago

Read 2 more answers

How many grams of chlorine gas are present in a 150. liter cylinder of chlorine held at a pressure of 1.00 atm and 0. °C? Group

OlgaM077 [116]

Answer:

474 grams of chlorine gas are present in a 150 liter cylinder of chlorine held at a pressure of 1.00 atm and 0 °C

Explanation:

An ideal gas is a theoretical gas that is considered to be composed of randomly moving point particles that do not interact with each other. Gases in general are ideal when they are at high temperatures and low pressures.

The pressure, P, the temperature, T, and the volume, V, of an ideal gas, are related by a simple formula called the ideal gas law:

P*V = n*R*T

where P is the gas pressure, V is the volume that occupies, T is its temperature, R is the ideal gas constant, and n is the number of moles of the gas.

In this case:

P= 1.00 atm
V= 150 L
n= ?
R= 0.082 $\frac{atm*L}{mol*K}$
T= 0 C= 273 K

Replacing:

1.00 atm* 150 L= n*0.08206 $\frac{atm*L}{mol*K}$ *273 K

Solving:

$n=\frac{1.00 atm* 150 L}{0.08206 \frac{atm*L}{mol*K}*273 K}$

n= 6.69 moles

Being Cl= 35.45 g/mole, the molar mass of chlorine gas is:

Cl₂=2*35.45 g/mole= 70.9 g/mole

So if 1 mole has 70.9 grams, 6.69 moles of the gas, how much mass does it have?

$mass=\frac{6.69 moles*70.9 grams}{1 mole}$

mass= 474.321 grams ≅ 474 grams

474 grams of chlorine gas are present in a 150 liter cylinder of chlorine held at a pressure of 1.00 atm and 0 °C

4 0

3 years ago