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nata0808 [166]
3 years ago
14

Please help me I need help with this questions I’m very confused fused as to what the answer is please

Chemistry
1 answer:
zepelin [54]3 years ago
3 0
Answer: This was because the experiment showed that a substance could emit radiation even while it was not exposed to light.
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Determine the unknown mineral using the information given below. Be sure to use significant figure rules when doing calculations
Mademuasel [1]

Answer:

Mass: 981.0 g

Density: 5.61 g/cm^3

Hardness: = 2.5 - 3

Unknown material: Chalcocite

8 0
3 years ago
Which chemical property deals with the ability of a substance being able to
Fantom [35]

\large\underline{\bf\red{Solution:-}}

The chemical property deals with the ability of a substance being able to burn is called combustibility [ option b ] .

<u>More</u><u> to</u><u> know</u><u> </u><u>:</u><u>-</u>

<em>1</em><em>)</em><em> </em><em>Combustion</em><em> </em><em>:</em><em>-</em>

Combustion is a chemical process in which a substance reacts rapidly with oxygen and gives out heat.

The fuel can be any one of the 3 states of matter that is - solid , liquid & gases .

Examples of combustible substances :-

Solid - Coal

Liquid - Petrol , Disel , etc.

Gas - Hydrogen , Oxygen , etc .

5 0
3 years ago
Read 2 more answers
The pH pH scale for acidity is defined by pH = − log 10 [ H + ] pH=-log10[H+] where [ H + ] [H+]is the concentration of hydrogen
balu736 [363]

Answer:

2 51 × 10^-5mol/L

Explanation:

The concentration of hydrogen ions can be calculated using the formula below :

pH = -log [H+]

pH = 4.6

[H+] = ?

[H+] = Antilog (-4.6)

[H+] = 2 51 × 10^-5mol/L

7 0
4 years ago
What is the difference between a homogenous and a heterogeneous?
kobusy [5.1K]

Answer:

Explanation:

A homogeneous mixture consists of one single phase while a heterogeneous mixture consists of two or more phases.

5 0
3 years ago
What is the molar mass of CH2O2?
Flauer [41]
<em>M CH₂O₂:</em>
mC + mH×2 + mO₂×2
= 12g + 1g×2 + 16g<span>×2 = <u>46g/mol</u>

:)</span>
5 0
3 years ago
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