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3 years ago

How much silver is produced is 15.00 grams of cu is added to the solution of excess silver nitrate?

1 answer:

6 0

First write out the balanced equation. 3Cu+2Ag(NO3)3=2Ag+3Cu(NO3)2
Then convert copper from grams to moles
15 g*1 mol cu/63.54 g= 15/63.54 mol cu
Then use the mole ratio to convert Moles Cu to Moles Ag
15/63.54 moles Cu* 2 moles Ag/3 moles Cu
The final awnser is (15*2)/(63.54*3) moles Ag =0.157 moles Ag. If the question wants the answer in grams, convert from moles Ag to grams Ag.
0.157 moles Ag*107.87 g Ag/ mol Ag=16.98 g Ag

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13. What is the photon energy associated with visible light with a wavelength of 4.25x10^-7 m?

4vir4ik [10]

$\\ \sf\bull\longmapsto E=hv$

$\\ \sf\bull\longmapsto E=\dfrac{hc}{\lambda}$

$\\ \sf\bull\longmapsto E=\dfrac{6.626\times 10^{-34}Js\times 3\times 10^8ms^{-1}}{4.25\times 10^{-7}m}$

$\\ \sf\bull\longmapsto E=\dfrac{19.878\times 10^{-26}Jm}{4.25\times 10^{-7}m}$

$\\ \sf\bull\longmapsto E=4.677\times 10^{-19}J$

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2 years ago

What is the coefficient of diphosphorus trioxide? (p2o3)

denis-greek [22]

The cofficent is 2 for diphosphorus trioxide

7 0

3 years ago

BRAINIEST TO THE ONE WHO ANSWER THIS

alexandr1967 [171]

Answer:

The statement that best describes the trend in first ionization enery of elements on the periodic table is:

It generally decreases down a group because valence electrons are farther from the nucleus.

The first ionization energy measures how difficult is to release an electron from the outermost shell. The higher the ionization energy the more difficult it is to release an electron, the lower the ionication energy the easier to release an electron.

As the atomic number of the atom increases (which is what happens when you go down a group) the furthest the outermost shell of electrons will be (the size of the atoms increases) and so those electrons require less energy to be released, which means that the ionization energy decreases.

Hope it helps!

4 0

2 years ago

Read 2 more answers

An analytical chemist has determined by measurements that there are 8.5 moles of magnesium in a sample of talc. How many moles o

MrRissso [65]

There are 5.66 moles of hydrogen in the sample of talc(hydrated magnesium silicate).

Given,

Talc formula is $Mg_{3} Si_4O_{10} (OH)_2$

moles of magnesium = 8.5 moles

The stoichiometry of magnesium and hydrogen is 3 : 2,

So 3 moles of magnesium is equivalent to 2 moles of hydrogen.

Then 8.5 moles of magnesium is equivalent to $\frac{2}{3} *8.5$ =5.6666 moles

Talc(hydrated magnesium silicate), often known as talcum, is a type of clay mineral made up of hydrated magnesium silicate, having the formula Mg3Si4O10(OH)2. Baby powder is made of powdered talc, frequently mixed with corn starch. This mineral serves as a lubricant and thickening agent. It serves as a component in paint, pottery, and roofing materials. It serves as a key component in many cosmetics. It can be found as foliated to fibrous aggregates and in a remarkably uncommon crystal form. It is foliated with a two-dimensional platy form, has a flawless basal cleavage, and an irregular flat fracture.

Talc(hydrated magnesium silicate), the softest mineral, is assigned a value of 1 on the Mohs scale of mineral hardness, which is based on scratch hardness comparisons.

Learn more about Talc here:

brainly.com/question/24082743

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4 0

2 years ago

How much of a 10 M solution is needed to make 1 liter of a 1 M solution

mylen [45]

Answer:

0.1 L

Explanation:

M₁ × V₁ = M₂ × V₂

10M × V₁ = 1M × 1L

V₁ = 0.1 L

I hope this helps :)

5 0

3 years ago