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3 years ago

How does the state of atoms in a neon light change when light is emitted?

2 answers:

7 0

How does the state of atoms in a neon light change when light is emitted? They lose energy.-I hope this is correct!
Link: https://quizlet.com/4708128/chapter-4-flash-cards/

Blababa [14]3 years ago

5 0

The state of atoms in a neon light when light is emitted is loss of energy.

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If a stack of 1,008 alkali fuel cells in series generates 14,800 W of power, and each cell contributes equally to the power of t

USPshnik [31]

Answer:

Each cell contributes power of 14.7 Watts.

Explanation:

Total power generated by alkali furl cells = 14,800 Watts

Total number of fuel cells = 1,008

Power produced by one fuel cell = x

Total power generated = $14,800 Watts=x\times 1,008$

$x=\frac{14,800 Watts}{1,008}=14.6825 Watts\approx 14.7 Watts$

Each cell contributes power of 14.7 Watts.

6 0

3 years ago

Read 2 more answers

For the weak acid ch3cooh (acetic acid) that is titrated with a strong base (naoh), what species (ions/molecules) are present in

liq [111]

This is a strong base / week acid reaction.

NaOH + CH3COOH

The equilibrium of this reaction is very displaced to the right leading to the formation of the products

Na CH3COO + H2O

Na CH3COOH is a ionic compound which in solutionn will be as Na (+) and CH3COOH(-)

=> CH3COOH + NaOH = CH3 COO(-) + Na(+) + H2O

So, the predominant species in the solution are the ions Na(+) and CH3COO(-).

In general, in an strong base / weak acid titration, the predominant species present at the stoichiometric point will be the cation of the strong base (Na+ in this case) and the conjugate base of the weak acid (the anion of the weak acid, which is CH3COO- in this case).

The answer is predominantly Na(+) and CH3COO(-); predominantly because it is an equlibrium which means that the rectants will also br present.

3 0

3 years ago

Olive oil has a density of 0.92 g/mL. How much would 1 liter of olive oil weigh in grams?

svp [43]

Dimension analysis is to be used to solve this problem. First convert 1L to milliliters. That is equivalent to 1000 ml. Then by dimension analysis, multiply the volume ( 1000ml) to the density of oil (0.92 g/ml) resulting to the answer: 920 grams.

4 0

3 years ago

A 20.38 gram sample of cobalt is heated in the presence of excess sulfur. A metal sulfide is formed with a mass of 31.47 g. Dete

Viefleur [7K]

Answer: The empirical formula of the metal sulfide is $CoBr_{2}$ .

Explanation:

Given: Mass of metal = 20.38 g

Mass of metal sulfide = 31.47 g

Moles is the mass of a substance divided by its molar mass.

So, moles of cobalt (molar mass = 59 g/mol) are as follows.

$Moles = \frac{mass}{molarmass}\\= \frac{20.38 g}{59 g/mol}\\= 0.345 mol$

Moles of bromine (molar mass = 80 g/mol) are as follows.

$Moles = \frac{(31.47 - 20.38) g}{80 g/mol}\\= \frac{11.09 g}{80 g/mol}\\= 0.138 mol$

Now, the ratio of number of moles of cobalt and number of moles of bromine are as follows.

Moles of Co : Moles of Br = 1 : 2

Hence, the empirical formula is $CoBr_{2}$ .

Thus, we can conclude that the empirical formula of the metal sulfide is $CoBr_{2}$ .

6 0

3 years ago

Prove that the mixture of sugar and water is a solution and sand and water is not a solution

olga_2 [115]

Sugar dissolves and is spread throughout the glass of water. The sand sinks to the bottom. The sugar-water is a homogeneous mixture while the sand-water is a heterogeneous mixture. Both are mixtures, but only the sugar-water can also be called a solution. i got this from :www.chem4kids.com/files/matter_solution.html

7 0

4 years ago