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3 years ago

What type of heat is transferred from hot water to metal and plastic forks?

Chemistry

2 answers:

nexus9112 [7]3 years ago

8 0

Kinetic energy, hope that helps

patriot [66]3 years ago

7 0

Answer:

Kinetic energy is an energy that can be applied to another object, often considered the energy of motion.

Explanation:

Metals are generally good conductors of heat.

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Isotopes that decay with a nuclear break-up and emit a significant amount of energy are said to be ________.

podryga [215]

Answer to this is Radioactive isotopes.

Isotopes are the species of the same element having different atomic masses that means the number of protons remains the same but number of neutrons do differ. For example $_{1}^{2}\textrm{H}$ and $_{1}^{3}\textrm{H}$ are the two isotopes of Hydrogen ( $_{1}^{1}\textrm{H}$ ).

Radioactive isotopes are the isotopes which release some kind of energy in the form of alpha particles, beta particles or gamma radiation. Examples of each of the decay processes are :

Alpha Decay: In this decay one alpha particle having atomic mass 4 and atomic number 2 or we can say a He molecule will come out. $_{Z}^{A}\textrm{X}\rightarrow _{Z-2}^{A-4}\textrm{Y}+_{2}^{4}\alpha$

Beta Decay: In this decay a $\beta$ particle is emitted increasing the atomic number of the reactant by 1 unit.

$_{Z}^{A}\textrm{X}\rightarrow _{Z+1}^{A}\textrm{Y}+_{-1}^{0}\beta$

Gamma Radiation: In this type of reaction only radiation is emitted out which does not change the original molecule.

$_{Z}^{A}\textrm{X}\rightarrow _{Z}^{A}\textrm{X}+\gamma\text{ radiation}$

3 0

3 years ago

A 3.3 g sample of sodium hydrogen carbonate is added to a solution of acetic acid weighing 10.3 g. The two substances react, rel

Zanzabum

Answer:

1.73g of CO2.

Explanation:

We'll begin by writing the balanced equation for the reaction. This is given below:

NaHCO3 + CH3COOH → CH3COONa + H2O + CO2

Next we shall determine the masses of NaHCO3 and CH3COOH that reacted and the mass of CO2 produced from the balanced equation. This is illustrated below:

Molar mass of NaHCO3 = 23 + 1 + 12 + (16x3) = 84g/mol

Mass of NaHCO3 from the balanced equation = 1 x 84 = 84g

Molar mass of CH3COOH = 12 + (3x1) + 12 + 16 + 16 + 1 = 60g/mol

Mass of CH3COOH from the balanced equation = 1 x 60 = 60g

Molar mass of CO3 = 12 + (2x16) = 44g/mol

Mass of CO2 from the balanced equation = 1 x 44 = 44g

From the balanced equation above,

84g of NaHCO3 reacted with 60g of CH3COOH to produce 44g of CO2.

Next, we shall determine the limiting reactant of the reaction. This is illustrated below:

From the balanced equation above,

84g of NaHCO3 reacted with 60g of CH3COOH.

Therefore, 3.3g of NaHCO3 will react with = (3.3 x 60)/84 = 2.36g of CH3COOH.

From the above illustration, we can see that only 2.36g of CH3COOH out of 10.3g given reacted completely with 3.3g of NaHCO3. Therefore, NaHCO3 is the limiting reactant while CH3COOH is the excess reactant.

Finally, can determine the mass of CO2 produced during the reaction.

In this case the limiting reactant will be used because it will produce the mass yield of CO2 as all of it were used up in the reaction. The limiting reactant is NaHCO3 and the mass of CO2 produced is obtained as shown below:

From the balanced equation above,

84g of NaHCO3 reacted to produce 44g of CO2.

Therefore, 3.3g of NaHCO3 will react to produce = (3.3 x 44)/84 = 1.73g of CO2.

Therefore, 1.73g of CO2 is released during the reaction.

7 0

3 years ago

What will be the observations for the reaction: CuSO4(aq) + NaOH(aq)? Its a two mark question so two observations at least.

julia-pushkina [17]

The chemical reaction would be:

CuSO4(aq) + NaOH(aq) = Cu(OH)2(s) + Na2SO4(aq)

One observation would be the formation of a precipitate since one of the products is not readily soluble to aqueous solution. A formation of a blue precipitate will be observed.

6 0

3 years ago

Sort these elements into pairs that would most likely exhibit similar chemical properties. It doesn't matter which pair goes in

nikklg [1K]

Answer:

Na = Rb
Ne = Kr
O = Se

Explanation:

According to modern periodic table, the elements present in same group have same chemical properties , because they same valence shell electrons.

Na and Rb:

As these both elements are present in group one, so these are called Alkali metals. Almost all alkali metal have same chemical properties.

Ne and Kr:

Both these elements are present in group 18, called as noble gases.
They have same chemical properties like both are stable and are inert.

O and Se:

Both elements are present in group 16.
Both have same chemical properties.
Both have same valence shell electrons.

4 0

3 years ago

Sulfur oxidation Choose one: A. contributes to global warming due to CO2 production. B. contributes to global warming due to met

iren2701 [21]

Answer:

C . causes environmental acidification due to production of sulfuric acid.

3 0

3 years ago