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poizon [28]
3 years ago
13

Why a cut apple wrapped in foil does not turn brown?

Chemistry
1 answer:
Brums [2.3K]3 years ago
6 0
Because it's protected from air because air makes it turn brown.
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Explain why most metals are malleable and ductile but ionic crystals are not
Dima020 [189]
Throughout the metallic structure allowing the atoms to slide past each other. This sliding is why metals are ductile and malleable. Ioniccompound must break bonds to slide past one another, which causes the ionic material to split and crack.
7 0
4 years ago
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Which statement about liquid state of matter is true?
serious [3.7K]
The answer is A! Let me know if I was correct
4 0
3 years ago
An atom has the following electron configuration.
vagabundo [1.1K]

<u>Answer:</u> The number of valence electron in the given atom are 5

<u>Explanation:</u>

Valence electrons are defined as the electrons which are present in the outermost shell of an atom. Outermost shell has the highest value of 'n' that is principal quantum number.

For the given electronic configuration:  1s^22s^22p^63s^23p^64s^23d^3

When an element belongs to d-block, the number of valence electrons are present in ns,np\text{ and }(n-1)d orbitals

Here, n = 4

The electrons in '4s' orbital = 2

The electrons in '3d' orbital = 3

Number of valence electrons = 2 + 3 = 5

Hence, the number of valence electron in the given atom are 5

8 0
3 years ago
Read 2 more answers
A system is in equilibrium when the rate of the forward reaction is _____ the rate of the reverse reaction.
NemiM [27]

Answer:

Option 4) equal to

Explanation

When having a reversible reaction, this reaction (or system) reaches the balnace, it is observed that relative quantitives for all compounds (this is, reactives and products), remain constant

The species concentration does not change over time, and; in the same way; there are no physical changes as time goes by

For example, for the following reaction :

aA + bB ⇔ cC + dD

Compounds A and B react to give products C and D. The two way arrows means that this systme has reached the balance (is in equilibrium)

3 0
4 years ago
How many moles of calcium chloride are needed to produce 6.50 moles of sodium chloride?
Anit [1.1K]

Answer:

This question appear incomplete

Explanation:

This question appear incomplete because an equation to show the production of sodium chloride from calcium chloride should have been illustrated. However, if the balanced chemical equation showing sodium chloride (NaCl) been a product of a reaction involving calcium chloride (CaCl₂) as a reactant (shown below) is to be used, then we start by writing a complete balanced chemical equation

CaCl₂ + Na₂CO₃  ⇒   CaCO₃ + 2NaCl

From the equation above, it can be deduced that 1 mole of CaCl₂ is required to produce 2 moles of NaCl, thus how many moles of CaCl₂ will be required to produce 6.5 moles of NaCl.

1 mole of CaCl₂ = 2 moles of NaCl

? moles of CaCl₂ = 6.5 moles of NaCl

cross multiply

? moles of CaCl₂ = 6.5 × 1/2

? moles of CaCl₂ = 3.25 moles of CaCl₂

3.25 moles of CaCl₂ will be needed to produce 6.5 moles of NaCl

8 0
3 years ago
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