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hodyreva [135]
3 years ago
6

How do you know when writing out equations the state of the element or compound

Chemistry
1 answer:
erica [24]3 years ago
7 0

Answer:

The state of matter is usually written in parentheses as a subscript directly after the element or compound.

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A space probe identifies a new element in a sample collected from an asteroid. Successive ionization energies (in attojoules per
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<span>Ionization energy (IE) is the amount of energy required to remove an electron.
 
If you observe the IEs sequentially, there is a large gap between the 2nd and 3rd. This suggests it is difficult to remove more than 2 two electrons. Elements that lose two electrons to become more stable are found in the Group 2A (2 representing the number of electrons in the outermost valence shell).</span>
6 0
3 years ago
Read 2 more answers
A chemist mixes 1.00 g CuCl2 with an excess of (NH4)2HPO4 in dilute aqueous solution . He measures the evolution of 670 J of hea
kaheart [24]

Answer:

\Delta H will be 90054 J

Explanation:

Number of moles = (mass)/(molar mass)

Molar mass of CuCl_{2} = 134.45 g/mol

So, 1.00 g of CuCl_{2} = \frac{1.00}{134.45}mol of CuCl_{2} = 0.00744 mol of CuCl_{2}

0.00744 mol of CuCl_{2} produces 670 J of heat

So, 1 mol of CuCl_{2} produces \frac{670}{0.00744}J of heat or 90054 J of heat

4 0
4 years ago
Which is true of a molecule?
rusak2 [61]

Answer:

All molecules of a compound have the same properties. The chemical properties of any individual compound would not change. The molecule is one of the smallest particles in any element that has the chemical properties of that element. Molecules are made of atoms.

4 0
4 years ago
What uses lines of bubbles in a superheated liquid to track particles?
Dmitry [639]
Is bubble chamber one of your choices?  Bubble chamber sounds like a good fit for the question.
7 0
3 years ago
What mass of oxygen is needed to burn 54.0 grams of butane c4h10
Jobisdone [24]

The moles of oxygen required to burn Butane is 6 moles.

<h3>What is a Combustion Reaction?</h3>

A reaction in which fuel gets oxidised by an oxidising agent producing a large amount of heat is called a combustion reaction.

In this question

Butane is burnt with oxygen

Molar mass of C₄H₁₀ = (12.0×4 + 1.0×10) g/mol = 58.0 g/mol

Molar mass of O₂ = 16.0×2 g/mol = 32.0 g/mol

Balanced equation for the reaction:

2C₄H₁₀ + 13O₂ → 8CO₂ + 10H₂O

Mole ratio C₄H₁₀ : O₂ = 2 : 13

The given mass = 54grams

moles = 54/58 = 0.93 moles

The mole of oxygen required =

0.93/ x = 2/13

0.93*13/2 = x

x = 6.045 moles

Therefore 6 moles of oxygen are required to burn Butane.

To know more about Combustion Reaction

brainly.com/question/12172040

#SPJ1

6 0
2 years ago
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