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labwork [276]
2 years ago
15

A) State and explain three ways by which plants protect themselves from danger.

Chemistry
2 answers:
Slav-nsk [51]2 years ago
3 0

Answer:

a) Secretion of unpleasant liquids which make them distasteful.

Possession of spines or thorns or irritating hairs which cause pain or irritation on contact.

Possession of poisonous parts which cause pain or itching or death or swelling on contact.

b) An anion is a negatively charged atom (or group of atoms).

OR

An anion is an ion formed when an atom (or group of atoms) gain electrons.

c) i. NH4OH and dilute HCL.

= Ammonium chloride, water

ii. CACO3 and dilute HCL.

= Calcium chloride, water, carbon dioxide or carbon (IV) oxide.

Hope it helps. Please mark as brainliest.

Marrrta [24]2 years ago
3 0

Explanation:

Same as cherishdisah's answer. Thanks.

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Read 2 more answers
The volume of a given mass of agas is 360cm cubic at 50 degrees and 700 milimetres Hg .find it's volume at s.t.p​
saveliy_v [14]

Answer:

V₂  =279.9 cm³

Explanation:

Given data:

Initial volume = 360 cm³

Initial temperature = 50°C

Initial pressure = 700 mmHg

Final volume = ?

Final temperature = 273 k

Final pressure = 1 atm

Solution:

According to general gas equation:

P₁V₁/T₁ = P₂V₂/T₂

Solution:

<em>We will convert the mmHg to atm.</em>

700/760 = 0.92 atm

<em>and °C to kelvin.</em>

50+273 = 323 K

P₁V₁/T₁ = P₂V₂/T₂

V₂ = P₁V₁ T₂/ T₁ P₂

V₂ = 0.92 atm × 360 cm³ × 273 K / 323 K ×1 atm

V₂  =  290417.6 atm .cm³.  K  / 323 k. atm

V₂  =279.9 cm³

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