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Sveta_85 [38]
4 years ago
6

Define the terms chemistry and matter.

Chemistry
1 answer:
DanielleElmas [232]4 years ago
6 0
Chemistry is the branch of science that deals with the composition and properties of matter and substances.

Matter is anything that has mass and takes up space.
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What is a segment of dna that contains a single unit of information?
pav-90 [236]
This segment is called a gene
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What are the products of a neutralization reaction?
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In an acid and base neutralization reaction, the products are salt and water.
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3 years ago
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Find the heat produced from an 8.00 L cylinder of propane gas under 5.00 atm at 25.0 oC, if one mole of propane can produce 2220
Andrei [34K]

Answer:  3597 kJ of heat

Explanation:

According to ideal gas equation:

PV=nRT

P = pressure of gas = 5.00 atm

V = Volume of gas = 8.00 L

n = number of moles = ?

R = gas constant =0.0821Latm/Kmol

T =temperature =25.0^0C=(25.0+273)K=298K

n=\frac{PV}{RT}

n=\frac{5.00atm\times 8.00L}{0.0821 L atm/K mol\times 298K}=1.63moles

As it is given :

1 mole of propane produces = 2220 kJ of heat

Thus 1.63 moles of propane produces = \frac{2200}{1}\times 1.63=3597kJ

Thus 3597 kJ of heat is produced

4 0
3 years ago
Read 2 more answers
Classify each of the following properties of a cake as qualitative or quantitative. Give reasons for your answers
VashaNatasha [74]

Answer:

The answer to your question is below

Explanation:

A qualitative property of matter is a property characteristic of a substance like color and flavor.

A quantitative property of matter is a property when we get a number.

A) it's a circular shape  is a qualitative property because the shape is a qualitative property and shape is not represented by a number.

B) its mass is 1.5 kg  is a quantitative property because we know a number of this mass.

C) it tastes like chocolate  is a qualitative property because the flavor is characteristic of a substance and flavor is not measured in numbers.

D) it is 30 cm in diameter  it is a quantitative property, we know the exact dimension of it.

E) its icing is melting is a qualitative property, melting is a property of ice, it just happens.

4 0
4 years ago
Use the equation editor or "Insert Chemistry - WIRIS editor" to write the balanced molecular chemical equation for the reaction
11Alexandr11 [23.1K]

Answer:

<u>Balanced equation:</u>

Pb(NO_{3})_{2}(aq)+K_{2}CO_{3}(aq)\rightarrow PbCO_{3}(s)+2KNO_{3}(aq)

Explanation:

The chemical reaction between Lead(II) Nitrate and potassium carbonate is as follows.

Lead(II)Nitrate+Potassium\,carbonate \rightarrow Lead(III)\,\,carbonate+Potassium\,nitrate

Pb(NO_{3})_{2}(aq)+K_{2}CO_{3}(aq)\rightarrow PbCO_{3}(s)+2KNO_{3}(aq)

<u>Ionic equation:</u>

Pb^{2+}(aq)+2NO_{3}^{-}(aq)+2K^{+}(aq)+CO_{3}^{2-}(aq)\Leftrightarrow PbCO_{3}(s)+K^{+}(aq)+2NO_{3}^{-}

Cancel the same ions on the both sides of the reaction.

The net ionic equation is as follows.

Pb^{2+}(aq)+CO_{3}^{2-}(aq)\Leftrightarrow PbCO_{3}(s)

4 0
3 years ago
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