Which chemical reaction below demonstrates the combustion of a hydrocarbon?

Answer:

it's d

Explanation:

I took the test and got it right

Answer:

There will not be effect on the gas

Explanation:

I'm sure that it's correct answer

Explanation:

Yes carbon dioxide found in each case

Answer:

a charge on a solar battery cell

Answer:

The 2 types of behavioral adaptation are migration, and hibernation. Explanation: Adaptation of animal is the fitness towards its environment.

Explanation:

Answer:

1. 2AgO2 --> 4 Ag + O2

2. Decomposition

3. 2NaBr + CaF2 --> 2NaF + CaBr2

Explanation:

Answer:

A number is right I think

Answer:

A.

beryllium fluoride

I hope it is helpful...

Answer:

isn't that evaporation if not you can just delete my answer-

Explanation:

Answer:

A!!!!!!!!

Explanation:

Answer:

400x

Explanation:

magnification=magnification of objective lens*magnification of eyepiece lens

m=40*10

m=400x

Answer:

6.39 × 10^23 kg (0.107 M⊕)

Explanation:

Answer:

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Answer:

open system

Explanation:

An open system is a system in which both energy and matter are exchanged with the surroundings.

Answer:

The value of the Golden Igloo is $227.4 million.

Explanation:

First, we need to find the inner and the outer volume of the half-spherical shell:

[tex] V_{i} = \frac{1}{2}*\frac{4}{3}\pi r_{i}^{3} [/tex]

[tex] V_{o} = \frac{1}{2}*\frac{4}{3}\pi r_{o}^{3} [/tex]

The total volume is given by:

[tex] V_{T} = V_{o} - V_{i} [/tex]

Where:

[tex] V_{i} [/tex]: is the inner volume

[tex]r_{i}[/tex]: is the inner radius = 1.25/2 = 0.625 m

[tex] V_{o} [/tex]: is the outer volume

[tex]r_{o}[/tex]: is the outer radius = 1.45/2 = 0.725 m

Then, the total volume of the Igloo is:

[tex] V_{T} = \frac{2}{3}\pi r_{o}^{3} - \frac{2}{3}\pi r_{i}^{3} = \frac{2}{3}\pi [(0.725 m)^{3} - (0.625 m)^{3}] = 0.29 m^{3} [/tex]

Now, by using the density we can find the mass of the Igloo:

[tex] m = 19.3 \frac{g}{cm^{3}}*0.29 m^{3}*\frac{(100 cm)^{3}}{1 m^{3}} = 5.60 \cdot 10^{6} g [/tex]

Finally, the value (V) of the antiquity is:

[tex] V = \frac{\$ 1263}{oz}*5.60 \cdot 10^{6} g*\frac{1 oz}{31.1034768 g} = \$ 227.4 \cdot 10^{6} [/tex]  

Therefore, the value of the Golden Igloo is $227.4 million.

I hope it helps you!  

Answer:

B

Explanation:

When stem cells differentiate, they are different (almost like mutation).

Answer:

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Answer:

Carbon dioxide and water.

Explanation:

If there isn't carbon dioxide, photosynthesis wouldn't happen as carbon dioxide is needed to transfer into the plant and after that the oxygen travels into the surroundings from the plant. There isn't any water, the plant wouldn't be able to make food called glucose.

Answer:

1.73 Molar

Explanation:

The formula is Molarity=moles of solute/liters of solution, which can be written in whatever way you prefer, and examples include: M=N/V or M=mol/L.

M=N/V

M= [tex]\frac{5.63}{3.25}[/tex]

Divide 5.63 by 3.25. When you calculate this, you get 1.73, therefore your answer is 1.73 molar.

Answer:

Carbon, helium, and sodium are monoatomic elements.

Hydrogen, iodine, and oxygen are diatomic elements.

Explanation:

Question 1 :

V1/T1 = V2/T2

3.0L/273K = V2/373K

To get the value of Z, cross multiply

3.0L x 373K = 273K x V2

1119 = 273V2

Divide both sides by 273

1119/273 = 273V2/273

4.10L = V2

The new volume is 4.10 liters

Question 2 :

P1/T1 = P2 /T2

P1 = 880 kPA= 880 *10^3 Pa

T1 = 250 K

T2 = 303 K

P2 =?

Substituting for P2

P2 = P1 T2/ T1

P2 = 880 kPa * 303 / 250

P2 = 266,640 kPa/ 250

P2 = 1066.56 kPa.

The new pressure of the gas is 1066.56 kPa

Question 3 :

Given that:

Volume of gas V = 4.80L

(since 1 liter = 1dm3

4.80L = 4.80dm3)

Temperature T = 62°C

Convert Celsius to Kelvin

(62°C + 273 = 335K)

Pressure P = 2.9 atm

Number of moles of gas N = ?

Apply ideal gas equation

pV = nRT

2.9atm x 4.8dm3 = n x (0.0082 atm dm3 K-1 mol-1 x 335K)

13.92 atm dm3 = nx 2.747 atm dm3 mol-1

n = 13.92/2.747

n = 5.08 moles

There are 5.08 moles of gas contained in the sample

Question 4 :

Volume of gas V = 3.47L

(since 1 liter = 1dm3

3.47L = 3.47dm3)

Temperature T = 85.0°C

Convert Celsius to Kelvin

(85.0°C + 273 = 358K)

Pressure P = ?

Number of moles of gas N = 0.100 mole

Apply ideal gas equation

pV = nRT

p x 3.47dm3 = 0.10 x (0.0082 atm dm3 K-1 mol-1 x 358K)

p x 3.47dm3 = 0.29 atm dm3

p = (0.29 atm dm3 / 3.47 dm3)

p = 0.085 atm

If 1 atm = 760 mm Hg

0.085atm = 0.085 x 760

= 64.6 mm Hg

The pressure of the gas is 64.6 mm hg

Answer:

0.1389mol

Explanation:

no of mol of Al in 7.5g=7.5g/27gmol^-1

=75/270mol

according to tge chemical equation

2mol of Al:1 mol of Al2S3

1mol of Al:0.5mol of Al2S3

therefore 75/270 mol of Al : 0.5*75/270 mol of Al2S3

=0.1389mol

Explanation:

A covalent bond can be thought of as a 'shared pair' of electrons, so there are 2 electrons in each bond. That means that a double bond will have 4 electrons in the space between the bonded nuclei, and a triple bond will have 6.

Answer:

2O is an atom while O2 Is a molecule

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Actually Welcome to the Concept of the Lens and Ray Optics.

We must understand the Concept that,

1.) When a beam of parallel light pass through a Convex lens, all the rays get deviated and converges to a special point at the axis that is a Focus.

2.) When a beam of light passes through the Concave lens,the light beams diverge from one another forming a virtual focus in the primary side of lens,

Hence the above given diagram beam rays are diverging, it is a CONCAVE LENS

answer is C.) Concave lens

Answer:

It wouldn't let me post it for some reason. Its all in the picture.

:)