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2 years ago

5

Fall is usually a little warmer than spring. And yet, the Sun's path is the same in both seasons. Select all that apply.PLEASE A

NSWER CORRECTLY I WILL GIVE BRAINLIEST!-THIS IS SCIENCE

1 answer:

vlada-n [284]2 years ago

7 0

I don't know the answer sorry I would answer if if I did

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I really need help with this!

Lady bird [3.3K]

Answer:

Explanation:

The answers are all written in the attachment below. Pardon the writing

8 0

3 years ago

N2 + 3H2 2NH3 How many molecules of H2 are in the reaction? molecules How many nitrogen atoms are present? atoms How many moles

tatiyna

There are two H2 .There are four nitrogen atoms present. There are two NH3 formed

7 0

2 years ago

I will give brainliest!!! What is the density of a sample of chlorine gas that exerts a pressure of 4.5 atm in a 12.6 L containe

labwork [276]

Answer : The density of a sample of chlorine gas is, 12.59 g/L

Explanation :

To calculate the density of chlorine gas we are using ideal gas equation.

$PV=nRT\\\\PV=\frac{w}{M}RT\\\\P=\frac{w}{V}\frac{RT}{M}\\\\P=\frac{\rho RT}{M}$

where,

P = pressure of chlorine gas = 4.5 atm

V = volume of chlorine gas = 12.6 L

n = number of moles of chlorine gas

w = mass of chlorine gas

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

T = temperature of chlorine gas = $36^oC=273+36=309K$

M = molar mass of chlorine gas = 71 g/mol

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

$P=\frac{\rho RT}{M}$

$4.5atm=\frac{\rho \times (0.0821L.atm/mol.K)\times (309K)}{71g/mol}$

$\rho=12.59g/L$

Therefore, the density of a sample of chlorine gas is, 12.59 g/L

7 0

3 years ago

A mixture of three noble gases has a total pressure of 1.25 atm. The individual pressures exerted by neon and argon are 0.68

Novosadov [1.4K]

Answer:

0.22 atm

Explanation:

The total pressure is the sum of the partial pressures.

P = P₁ + P₂ + P₃

1.25 atm = 0.68 atm + 0.35 atm + P

P = 0.22 atm

5 0

2 years ago

Read 2 more answers

The energy of colored light increases in the order red, yellow, green, blue, violet.List the metallic elements used in the flame

Vinil7 [7]

Answer:

Explanation:

Flame test:

The metals ions can be detected through the flame test. Different ions gives different colors when heated on flame. Tom perform the flame test following steps should follow:

1. Dip a wire loop in the solution of compound which is going to be tested.

2. After dipping put the loop of wire on bunsen burner flame.

3. Observe the color of flame.

4. Record the flame color produce by compound

Color produce by metals:

Red = Lithium, zirconium, strontium, mercury, Rubidium (red violet)

Orange-red = calcium

Yellow = sodium, iron (brownish yellow)

Green = green

Blue = cesium. arsenic, copper, tantalum, indium, lead

Violet = potassium (lilac)

3 0

3 years ago