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3 years ago

What kind of matter is smoke? A. solution B. suspension C. colloid D. compound E. molecule

Chemistry

2 answers:

aivan3 [116]3 years ago

5 0

Answer:

Explanation:

SVETLANKA909090 [29]3 years ago

5 0

Answer:

C. colloid

Explanation:

Smoke is a collection of tiny solid, liquid and gas particles. Although smoke can contain hundreds of different chemicals and fumes, visible smoke is mostly carbon (soot), tar, oils and ash. Smoke is a collection of tiny solid, liquid and gas particles.

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Why leaves often contain starch

Anastasy [175]

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7 0

4 years ago

A Rectangular Prism has a height of 4cm, a width of 5cm, a length of 1.2 cm, and a mass of 85,000 g. What is it's density?

wolverine [178]

Answer:

The answer is D.

Explanation:

Volume (V) = l x w x h

V = 4 x 5 x 1.2

V = 20 x 1.2

V = 24

Density = Mass/Volume or D = M/V

D = 85,000/24

D = 3541.66666666

4 0

3 years ago

The first five questions refer to the following problem:

MariettaO [177]

The Acceleration of a model rocket = 4 m/s²

<h3>Further explanation </h3>

Newton's 2nd law explains that the acceleration produced by the resultant force on an object is proportional and in line with the resultant force and inversely proportional to the mass of the object

∑F = m. a

$\large{\boxed{\bold{a=\frac{\sum F}{m}}}$

F = force, N

m = mass = kg

a = acceleration due to gravity, m / s²

An upward thrust of 35 N

A model rocket has a mass of 2.5 kg(weight = 25 N)

so resultant force :

$\tt \sum F=F~upward~thrust-F~weight\\\\\sum F=35-25\\\\\sum F=10~N$

The acceleration :

$\tt a=\dfrac{\sum F}{m}\\\\a=\dfrac{10}{2.5}\\\\a=4~m/s^2$

3 0

3 years ago

HELP IM AB TO CRY

Lemur [1.5K]

Answer:

1.23 × 10³ N

Explanation:

Step 1: Given and required data

Mass of the person (m): 125 kg

Acceleration due to the gravitational force (g): 9.81 m/s²

Step 2: Calculate the force acting between the Earth and a 125-kg person standing on the surface of the Earth

We will use Newton's second law of motion.

F = m × g

F = 125 kg × 9.81 m/s²

F = 1.23 × 10³ N

8 0

3 years ago

What is the molarity 8.1 moles of CaCO3 in 143 liters of solution?

BigorU [14]

Answer:

0.0566 moles/liter

Explanation:

molarity= moles/liter of solution

molarity=8.1mole/143 liter = 0.0566

3 0

3 years ago