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arsen [322]
2 years ago
14

What are some examples of physical changes?

Chemistry
2 answers:
Lorico [155]2 years ago
5 0

Answer: Melting of ice to water is a physical change. Evaporation, Freezing are also physical change. Cutting of wood, breaking of glass are also examples. Any change in size and phase but does not change its chemical composition is an example of a physical change.

Explanation:

Ludmilka [50]2 years ago
3 0

Some examples of physical changes are:

Breaking a glass

Chopping wood

Tearing paper

Mixing sand and water

Melting an ice cube

These all are physical changes because the composition of the matter does not change.

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Enter a chemical equation for NaOH(aq) showing how it is an acid or a base according to the Arrhenius definition. Consider that
yuradex [85]

Answer:

NaOH(aq) is a Base.

Explanation:

Those substances which give or release OH^{-} ions in aqueous solution are called as the Arrhenius Bases.

In the aqueous solution, NaOH dissociates as follows -

NaOH^{} ↔ Na^{+}  + OH^{-}

If it reacts with a strong acid HCl, the chemical equation for this reaction will be as follows -

HCl + NaOH = NaCl + H_{2} O

6 0
2 years ago
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professor190 [17]

Answer:

a

Explanation:

the solution is extremely acidic and will dissolve the zinc rod

3 0
3 years ago
Find the percent composition for SF6<br> S =? %<br> F =? %
goldenfox [79]

Answer:

S = 21.92 %

F = 78.08 %

Explanation:

To find the percent composition of each element in SF6, we must find the molar mass of SF6 first.

Molar mass of SF6 = 32 + 19(6)

= 32 + 114

= 146g/mol

mass of Sulphur (S) in SF6 = 32g

mass of Fluorine (F) in SF6 = 114g

Percent composition = mass of element/molar mass of compound × 100

- % composition of S = 32/146 × 100 = 21.92%.

- % composition of F = 114/146 × 100 = 78.08%.

6 0
2 years ago
1. The Lewis structure for CO2 has a central ________ atom attached to __________ atoms.
maksim [4K]
Central "carbon" atom

2 oxygen atoms

held together by "covalent" bonds

has a "1s2 2s2 2px1 2py1 2pz0" electron
geometry

carbon atom is "sp" hybridized

8 0
3 years ago
hat is the pH of a solution with a hydroxide ion concentration of 10–6M? A. pH = 12 B. pH = 8 C. pH = 6 D. pH = 7
WARRIOR [948]
C=10⁻⁶ mol/L

pH=14-pOH

pOH=-lg[OH⁻]

pH=14+lg10⁻⁶=14-6=8

B. pH = 8

8 0
3 years ago
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