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Black_prince [1.1K]
3 years ago
15

PLEASE HELP 8TH GRADE SCIENCE. which of the following is the correct Lee abbreviated SI unit describing the mass of an object

Chemistry
2 answers:
Licemer1 [7]3 years ago
6 0
Lucky guess dont put as a answer c.m
melamori03 [73]3 years ago
3 0
D. kg b/c to know the mass of an object you must measure it in grams
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Each element within a group has similar physical or chemical properties because of its atom's outermost electron shell (most chemical properties are dominated by the orbital location of the outermost electron).

Explanation:

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What is the correct formula and charge for the polyatomic ion called acetate
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A ground state hydrogen atom absorbs a photon of light having a wavelength of 92.05 nm. It then gives off a photon having a wave
vodka [1.7K]
Absorbed photon energy
Ea = hc/λ.. (Planck's equation)
Ea = hc / 92.05^-9m 

<span>Energy emitted
Ee = hc/ 1736^-9m </span>

Energy retained ..
∆E = Ea - Ee = hc(1/92.05<span>^-9 - 1/1736^-9) </span>
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 ∆E = 2.04^-18 / 1.60^-19
∆E = 12.70 eV </span>

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<span>New energy state = (-13.60 + 12.70)eV = -0.85 eV </span>

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4 0
3 years ago
How many moles of FeCl3 could be produced from 6.1 moles of Cly?<br> 2 Fe + 3Cl2 —&gt; 2 FeCl2
Black_prince [1.1K]

Answer:

4.1 moles of FeCl₃

Explanation:

The reaction expression is given as shown below:

         2Fe    +       3Cl₂   →    2FeCl₃

Number of moles of Cl₂  = 6.1moles

So;

  We know that from the balanced reaction expression:

                       3 moles of Cl₂ will produce 2 moles of FeCl₃

Therefore    6.1moles of Cl₂ will produce \frac{6.1 x 2}{3}   = 4.1 moles of FeCl₃

The number of moles is 4.1 moles of FeCl₃

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Answer:

C

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