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4 years ago

Ron wants to install an energy efficient and long lasting device for lighting in his new home. Which device should he use?

Chemistry

2 answers:

Vlada [557]4 years ago

5 0

He should use the long lasting one

kupik [55]4 years ago

3 0

Answer:

Light Emitting Diode (LED) lighting device.

Explanation:

Light Emitting Diode (LED) is an electrical component that produces light when a current flows through its terminals. It has a long life span and conserves energy coupled with brilliant lightning effects. Also, it is light in weight and generate no heat compared to other lighting devices. It is majorly recomended because of its diverse properties and efficient functions.

This componet can be incorporated to produce an energy efficient and long lasting lighting device. So, Ron should use a Light Emitting Diode (LED) lighting device.

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The mass number of 3 isotopes of magnesium are 24,25,26.what is the mass number of the most abundant isotope of magnesium.

Anarel [89]

Answer:

24.4 amu or g/mole

Explanation:

24 x 0.790 = 19.0 amu

25 x 0.100 = 2.50 amu

26 x 0.110 = 2.86 amu

(Because of the 19.0, the sig figs go only to the 1/10 decimal place)

19.0 + 2.5 + 2.9 = 24.4 amu or g/mole

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3 years ago

What is one reason that abiotic factors are important in an ecosystem?

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8 0

3 years ago

All the following ions have the same charge except Group of answer choices oxide. monohydrogen phosphate. peroxide. permanganate

Triss [41]

All the given species have the same charge except peroxide.

<h3>Charges on ions</h3>

The charge on monohydrogen phosphate is negative because of its formula, $[HPO4]^{2-}$ .

The charge on permanganate is negative. The formula is $MnO^-$

The charge of oxide ( $O^{2-}$ ) is negative.

The charge on peroxide is ( R−O−O−R) is neutral.

The charge on oxalate, $C2O4^{2-}$ , is negative.

Thus, only peroxide is unique.

More on charges on ions can be found here: brainly.com/question/11938054

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4 0

2 years ago

Menthol (FW = 156.3 g/mol), the strong-smelling substance in many cough drops, is a compound of carbon, hydrogen, and oxygen. Wh

Alisiya [41]

Answer: the molecular formula is C10H20O

Explanation:Please see attachment for explanation

7 0

4 years ago

A compound is analyzed and found to contain 22.10%Al, 25.40%P, and 52.50%O. What is the empirical formula of the compound?

Whitepunk [10]

Let the total mass of compound is 100g

The mass of each element will be

Al = 22.10 g

P = 25.40 g

O = 52.50 g

In order to determine the molecular formula we will calculate the molar ratio of the given elements

Atomic weight of Al : 27 g/ mol

Atomic weight of P : 3 1g /mol

Atomic weight of O : 16 g /mol

Moles of Al = mass / atomic mass = 22.10 / 27 = 0.819

Moles of P = mass / atomic mass = 25.40/ 31 = 0.819

Moles of O = mass / atomic mass = 52.50/ 16 = 3.28

Now we will divide the moles of each element with the lowest moles obtained to obtain a whole number ratio of moles of each element present

moles of Al = 0.819 / 0.819 = 1

moles of P = 0.819 / 0.819 = 1

moles of O = 3.28 / 0.819 = 4

So the empirical formula will be : AlPO4

8 0

3 years ago