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iragen [17]
2 years ago
5

PLEASE HELP ASAP!!! I REALLY NEED HELP ON THIS TEST!!!

Chemistry
1 answer:
Oksana_A [137]2 years ago
5 0

Answer:

1. Hyphothesis 2.Theory 3. law

Explanation:

not sure, but law is observation, theory is based on knowledge things before.

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Answer:

glucose and oxygen

Explanation:

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The charge of single electron
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The answer is B.

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3 years ago
The density of octane is 0.700 g/cm3.  What is the mass of one liter of octane?
Gelneren [198K]

Answer:

m = 700 g

Explanation:

Density:

Density is equal to the mass of substance divided by its volume.

Units:

SI unit of density is Kg/m3.

Other units are given below,

g/cm3, g/mL , kg/L

Formula:

D=m/v

D= density

m=mass

V=volume

Symbol:

The symbol used for density is called rho. It is represented by ρ. However letter D can also be used to represent the density.

Given data:

Density of octane = 0.700 g/cm³

Volume = 1 L

Mass = ?

Formula:

D=m/v

D= density

m=mass

V=volume

First of all we will convert the volume in cm³ because density is given in g/cm³ unit.

1 L = 1000 cm³

Now we will put the values in formula:

d= m/v

m = v × d

m = 1000 cm³ × 0.700 g/cm³

m = 700 g

5 0
3 years ago
Carbonic acid reacts with water to yield bicarbonate ions and hydronium ions: h2co3+h2o?hco3?+h3o+ identify the conjugate acid-b
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HCO3^- ion is an intermediate molecule of CO2 and CO3^2-. When we add OH- to HCO3^-, we produce CO3^2-. And when we add H+ to HCO3, we produce CO2. </span>
7 0
3 years ago
Which is a characteristic of all ions?
Brut [27]

Answer:

I guess B They have a charge

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