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2 years ago

Pls help me before my mother takes away my phone

Chemistry

1 answer:

kifflom [539]2 years ago

4 0

Answer:

sorry man i cant help you i tried my best im so so so sorry

Explanation:

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The tendency to combust is a chemical property. O True O False

erastova [34]

Answer:

The correct option is;

True

Explanation:

Combustion is a chemical reaction between components of a combustion reaction which are;

1) A fuel

2) An oxidizing agent

The oxidizing agent or oxidant in a combustion reaction consist mainly of oxygen.

A combustion reaction is an oxidation and reduction (redox) heat evolving (exothermic) reaction that takes place at high temperatures and produces smoke which consists of gaseous mixture of chemicals and sometimes very small solid particles

An exothermic reaction can be classed either as rapid, spontaneous, or explosive

A spontaneous exothermic reaction is one that begins on its own in atmospheric conditions and room temperature as the heat required to begin the reaction is produced by the initial oxidation of the reacting fuel

Example of a substance that undergoes spontaneous oxidation reaction is white phosphorus.

4 0

3 years ago

What are the characteristics of solution,colloids,and susensions?

Viefleur [7K]

AppearanceClear, transparent and homogeneousCloudy, heterogeneous, at least two substances visibleParticle Sizemolecule in sizelarger than 10,000 AngstromsEffect of Light Tyndall Effectnone -- light passes through, particles do not reflect lightvariableEffect of Sedimentationnoneparticles will eventually settle ou

5 0

2 years ago

Read 2 more answers

Calculate the concentration of OH- in a solution that contains 3.9 x 10-4 M H3O+ at 25°C. Identify the solution as acidic, basic

aalyn [17]

Answer:

[OH⁻] = 2,6x10⁻¹¹

Acidic

Explanation:

The kw in water is:

2 H₂O(l) ⇄ OH⁻(aq) + H₃O⁺(aq)

kw = [OH⁻] [H₃O⁺] = 1,00x10⁻¹⁴

If concentracion of H₃O⁺ is 3,9x10⁻⁴M:

[OH⁻] [3,9x10⁻⁴M] = 1,00x10⁻¹⁴

[OH⁻] = 2,6x10⁻¹¹

pH is defined as - log[H₃O⁺]. If pH>7,0 the solution is basic, if pH<7,0 solution is acidic, if pH=7,0 solution is neutral.

In this problem,

pH = - log [3,9x10⁻⁴M] = 3,4

As pH is < 7.0, the solution is acidic

I hope it helps!

8 0

3 years ago

Compound B, C6H12O2, was found to be optically active, and it was oxidized to an optically active carboxylic acid A, by Ag (aka,

Daniel [21]

Answer:

Check the explanation

Explanation:

Acidipic Acid (which is an essential dicarboxylic acid for manufacturing purposes with about 2. 5 billion kilograms produced per year. It is mainly used for the production of nylon and its related materials.)

Going by the question, since the $H_{2} CrO_{4}$ is comparatively mild oxidizing agent than the $CrO_{3}$ , it only oxidizes the carbon group

Kindly check the attached image below for the full explanation to the question above.

8 0

3 years ago

How would you prepare 175 mL of a 0.350kmol/m^3 calcium nitrate solution

SVEN [57.7K]

0,35 kmol/m³ = 0,35 mol/dm³ = 0,35 mol/L
175 mL = 0,175 L
*-*-*-*-*-*-*-*-*-*-*-*
C = n/V
n = 0,35×0,175
n = 0,06125 mol

mCa(NO₃)₂: 40+(14×2)+(16×6) = 164 g/mol

1 mol --------- 164g
0,06125 ---- X
X = 10,045g

To prepare 175 mL of 0,35M solution, add 10,045g of calcium nitrate and add water to a volume of 175ml.

3 0

3 years ago