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Aleks04 [339]
3 years ago
7

Mixtures can be separated by physical changes. Please select the best answer from the choices provided T F

Chemistry
1 answer:
AfilCa [17]3 years ago
8 0

Answer: Given statement is true.

Explanation:

When two or more substances mixed together then it results in the formation of mixture.  

For example, a mixture of sand and water.

Mixtures are not chemically combined species because they can be separated by physical methods like filtration, distillation etc.

Hence, we can conclude that the given statement, mixtures can be separated by physical changes is true.

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Draw it draw lewis dot structures for each hypothetical molecule shown below, using the correct number of valence electrons for
soldi70 [24.7K]

The first molecule is a sensible molecule having complete octet of each atom such as C, H and O whereas the second molecule having hydrogen present between the aldehyde and methyl group and thus showing hydrogen is making bond with aldehyde and methyl as well which is not possible because hydrogen only having one electron in its octet due to which it can only form a single bond by sharing its valence electron.

6 0
3 years ago
2 bromocyclopentanamine structural formula
Elis [28]

Answer:

The structure is given in attached file.

Explanation:

Explanation

2-bromocyclopentamine (Figure attached) is a synthetic compound which is synthesized by substitution reaction of cyclopentamine and hydrobromide. Its molecular formula and molecular mass are C5H10NBr and 164.05 mol/g respectively.  It is a very reactive compound so it doesn’t available in pure form, it is present in market as a mixture of 2-bromocyclopentamine and Hydrobromide.

Properties :

Its boiling point is 115 0C

Its melting point is – 75 oC

It is highly flammable

It is highly toxic

It is irritant

It is corrosive in nature

5 0
3 years ago
‘By using displacement reactions it is possible to deduce the order of reactivity of the halogens.’
Rashid [163]

Answer:

Explanation:

The halogens have seven electrons in their outermost shell. Each halogen atom lacks a single electron to make their octet a complete one. Elements in the halogen group are univalent and also acceptors of electrons. They are all non-metals and oxidizing agents. The oxidizing power of the halogens decreases from top to down the group. This is why the more powerful halogens displaces a less powerful one from simple salts.

         Cl₂ + 2KBr → 2KCl + Br₂

         Cl₂ + 2KI → 2KCl + I₂

          Br₂ + 2KI → 2KBr + I₂

          I₂ + 2KCl → No reaction

           

7 0
3 years ago
For the following reaction, predict whether the equilibrium lies predominantly to the left or to the right. Explain.
Likurg_2 [28]

Answer:

Lies predominantly to the left.

Explanation:

In the reaction:

NH4⁺(aq) + Br-(aq) ⇄ NH3(aq) + HBr(aq)

Conjugate acid + Ion ⇄ weak base + strong acid

HBr is a strong acid whereas NH3/NH4⁺ are the weak base and its conjugate base. A strong acid as HBr dissociates completely in solution as H⁺ and Br⁻. That means in solution you will never have HBr without dissociation doing the reaction:

<h3>lies predominantly to the left.</h3>
6 0
3 years ago
Which element on the periodic table has the highest electronegativity
marusya05 [52]

Answer:

fluorine

Explanation:

Electronegativity varies in a predictable way across the periodic table. Electronegativity increases from bottom to top in groups, and increases from left to right across periods. Thus, fluorine is the most electronegative element, while francium is one of the least electronegative

5 0
2 years ago
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