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3 years ago

How many neutrons does the element Platinum (Pt) have?

Chemistry

1 answer:

VladimirAG [237]3 years ago

4 0

Answer:

117

Explanation:

It is classified as a transition metal. Platinum atoms have 78 electrons and 78 protons with 117 neutrons in the most abundant isotope. It is considered to be a precious metal along with silver and gold.

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How many electrons are in the 3d sublevel in the ground state configuration of copper?

iren2701 [21]

Answer:

I think it mite be 9 maybe Ok

6 0

4 years ago

If 0.905 mol Al2O3 is produced in the reaction, what mass of Fe in product's

Marrrta [24]

Answer: Amount of iron produced is 101.36 grams.

Explanation:

For the reaction of aluminium and iron oxide, the equation follows:

$2Al+Fe_2O_3\rightarrow Al_2O_3+2Fe$

By Stoichiometry of the reaction,

When 1 mole of aluminium oxide is produced, then 2 moles of iron is also produced.

So, when 0.905 moles of aluminium oxide is produced, then $\frac{ 2}{1}\times 0.905mol=1.81moles$ of iron is also produced.

Now, to calculate the amount of iron produced, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Molar mass of iron = 56 g/mol

Moles of iron = 1.81 moles

Putting values in above equation, we get:

$1.81mol=\frac{\text{Mass of iron}}{56g/mol}\\\\\text{Mass of iron produced}=101.36g$

Hence, amount of iron produced is 101.36 grams.

3 0

3 years ago

Is lysomes a plant or animals cell

sergeinik [125]

Answer:

Animal

Explanation:

8 0

3 years ago

Read 2 more answers

The following chemical reaction takes place in aqueous solution: AgF (aq)+ NH4Cl (aq) →AgCl(s)+ NH4F(aq) Write the net ionic equ

Nadusha1986 [10]

Answer:

The net ionic equation is: Ag⁺ (aq) + Cl ⁻ (aq) → AgCl (s)

Explanation:

1) Start by writing the total ionic equation:

The total ionic equation shows each aqueous substance in its ionized form, while the solid or liquid substances are shown with their chemical formula.

These are the ionic species:

AgF (aq) → Ag⁺ (aq) + F⁻ (aq)

NH₄Cl (aq) → NH₄⁺ (aq) + Cl ⁻ (aq)

NH₄F(aq) → NH₄⁺ (aq) + F⁻ (aq)

Then, replace each chemical formula in the chemical equation by those ionic forms:

Ag⁺ (aq) + F⁻ (aq) + NH₄⁺ (aq) + Cl ⁻ (aq) → AgCl (s) + NH₄⁺ (aq) + F⁻ (aq)

That is the total ionic equation.

2) Spectator ions:

The ions that appear in both the reactant side and the product side are considered spectator ions (they do not change), and so they are canceled.

In our total ionic equation they are F⁻ (aq) and NH₄⁺ (aq).

After canceling them, you get the net ionic equation:

3) Net ionic equation:

Ag⁺ (aq) + Cl ⁻ (aq) → AgCl (s) ← answer

4 0

3 years ago

What is the number of protons and electrons in a neutral atom of Lithium?

nadya68 [22]

If you look at the periodic table you will see the atomic number (the smaller number) which is 3. that identifies how many protons there are. since the lithium is neutral that means there’s a same amount of electrons.

therefore there’s 3 electrons and 3 protons

3 0

3 years ago