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eduard
3 years ago
6

An unknown Element X is discovered. Element X is found to have varying numbers

Chemistry
1 answer:
Genrish500 [490]3 years ago
7 0
I think transition metals
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Of the following which element is the heaviest? helium argon lithium aluminum
Georgia [21]

Answer:

Lithium

Explanation:

it is the only metal listed.

5 0
3 years ago
If you have a heartburn, how you could you safely help the situation
Ket [755]
The answer is:

:Avoid lying down after eating

That should help
7 0
3 years ago
So I saw this question: If 28.0 grams of Pb(NO3)2 react with 18.0 grams of NaI, what mass of PbI2 can be produced? Pb(NO3)2 + Na
Nataly_w [17]

mass of PbI₂ = 27.6606 g

<h3>Further explanation</h3>

Given

Pb(NO₃)₂ + NaI → PbI₂ + NaNO₃

28.0 grams of Pb(NO₃)₂ react with 18.0 grams of NaI

Required

mass of PbI₂

Solution

Balanced equation

Pb(NO₃)₂ + 2NaI → PbI₂ + 2NaNO₃

The principle of a balanced reaction is the number of atoms in the reactants = the number of atoms in the product

mol Pb(NO₃)₂ :

= 28 : 331,2 g/mol

= 0.0845

mol NaI :

= 18 : 149,89 g/mol

= 0.12

Limiting reactant : mol : coefficient

Pb(NO₃)₂ : 0.0845 : 1 = 0.0845

NaI : 0.12 : 2 = 0.06

NaI limiting reactant (smaller ratio)

mol PbI₂ based on NaI

= 1/2 x 0.12 = 0.06

Mass PbI₂ :

= 0.06 x 461,01 g/mol

= 27.6606 g

4 0
3 years ago
An adiabatic throttling valve expands an ideal gas. The internal energy of the ideal gas?
just olya [345]

The internal energy of the ideal gas is zero

The change in internal energy  for an isothermal process is zero.

An ideal gas has no interactions between particles, therefore no intermolecular forces.

pressure change at constant temperature does not change the internal energy.

Adiabatic throttling expansion has less work done and lower heat flow.

That lower the internal energy.

The temperature decreases during the adiabatic expansion

Hence the internal energy of the ideal gas is zero

Learn more about the ideal gas on

brainly.com/question/17136449

#SPJ4

3 0
1 year ago
Which type of molecule is shown below?
denis-greek [22]
The answer is A. It is an alkyn. There is a triple bond
3 0
3 years ago
Read 2 more answers
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