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mrs_skeptik [129]
4 years ago
13

Help!! 29 pointss

Chemistry
1 answer:
yaroslaw [1]4 years ago
3 0
10 is mixture of elements and compounds
11 is compound
12-15 are mixture of compounds
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Which of these is not a structural adaptation? A) Horns B) Thick white fur C) Seasonal migration D) A long beak
Snezhnost [94]

Answer:

c) Seasonal migration

Explanation:

Because A, B and C are all examples of structural adaptations. And seasonal migration is not something that is in an animals structure but is instinct.

Have a great day!

6 0
3 years ago
5/10
julsineya [31]

Answer:

B.

Explanation:

This is physical change as the popcorn has expanded in size.

4 0
3 years ago
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If you have a 550-gram sample of carbon-14 how much remains after 7 half-lives.
Shtirlitz [24]
Idk but you can try to look it up. On google or somewhere else but yea idk about that one
5 0
4 years ago
A student has a mixture of salt (NaCl) and sugar (C12H22O11). To determine the percentage, the student measures out 5.84 grams o
julsineya [31]

Answer:

The volume of 1.0 AgNO₃ that would be required to precipitate 5.84 grams of NaCl is 99.93 ml

Explanation:

Here we have the reaction of AgNO₃ and NaCl as follows;

AgNO₃(aq) + NaCl(aq)→ AgCl(s) + NaNO₃(aq)

Therefore, one mole of silver nitrate, AgNO₃, reacts with one mole of sodium chloride, NaCl, to produce one mole of silver choride, AgCl, and one mole of sodium nitrate, NaNO₃,

Therefore, since 5.84 grams of NaCl which is 58.44 g/mol, contains

Number \, of \, moles, n  = \frac{Mass}{Molar \ mass} =  \frac{5.84}{58.44} = 0.09993 \ moles \ of \ NaCl

0.09993 moles of NaCl will react with 0.09993 moles of AgNO₃

Also, as 1.0 M solution of AgNO₃ contains 1 mole per 1 liter or 1000 mL, therefore, the volume of AgNO₃ that will contain 0.09993 moles is given as follows;

0.09993 × 1 Liter/mole= 0.09993 L = 99.93 mL

Therefore, the volume of 1.0 AgNO₃ that would be required to precipitate 5.84 grams of NaCl is 99.93 ml.

3 0
4 years ago
In addition to the two types of motion found in liquids, gases have <br> What kind of motion
makvit [3.9K]

Answer:

In liquids, particles are quite close together and move with random motion throughout the container. Particles move rapidly in all directions but collide with each other more frequently than in gases due to shorter distances between particles.

3 0
3 years ago
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