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1 year ago

WILL GIVE BRAINIEST ANSWER A chemical equation has different numbers of atoms on the left and right sides.

Chemistry

1 answer:

Alinara [238K]1 year ago

4 0

Answer:

Unbalanced

Explanation:

You need to have the same number of atoms on both sides for it to be balanced

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Which of the following sentences represents a physical change? sugar dissolves in coffee iron rusts gasoline burns in an engine

MAXImum [283]

Answer:

Physical changes example is sugar dissolves in coffee
Chemical changes examples are iron rusts, gasoline burns in an engine and a candle burns.

Explanation.

Physical changes depend on only physical state, not on composition, which can be separated by physical means while chemical changes depend on composition and only separated by chemical ways.
As in case of iron rusting, gasoline and candle burn are cases chemical changes bcz they convert into another substance whose composition is different from other as compare to sugar which has same composition in coffee ,only state is changed from solid to liquid.

6 0

3 years ago

Read 2 more answers

Which type of reaction is indicated by a positive AH?

lianna [129]

Answer:

An endothermic reaction

Explanation:

A positive sign indicates that energy is absorbed. Hence it is an endothermic reaction.

A reversible reaction is indicated by a double arrow on the chemical equation.

A spontaneous is indicated by negative Gibbs Free Energy (G) value.

An exothermic reaction is indicated by a negative enthalpy change

5 0

3 years ago

What distinguishes a neutral atom from an ion

Aliun [14]

will they contain the same number of protons as electrons. By the meaning, an "ion" is an electrically charged particle produced by either removing electrons from the neutral atom to give a positive ion or adding electrons to a neutral atom to give a negative" ion".
hope i helped :)

6 0

3 years ago

Kc for the reaction of hydrogen and iodine to produce hydrogen iodide, H2(g) I2(g) ⇌ 2HI(g) is 54.3 at 430°C. Determine the init

Jlenok [28]

Answer : The initial concentration of HI and concentration of $HI$ at equilibrium is, 0.27 M and 0.386 M respectively.

Solution : Given,

Initial concentration of $H_2$ and $I_2$ = 0.11 M

Concentration of $H_2$ and $I_2$ at equilibrium = 0.052 M

Let the initial concentration of HI be, C

The given equilibrium reaction is,

$H_2(g)+I_2(g)\rightleftharpoons 2HI(g)$

Initially 0.11 0.11 C

At equilibrium (0.11-x) (0.11-x) (C+2x)

As we are given that:

Concentration of $H_2$ and $I_2$ at equilibrium = 0.052 M = (0.11-x)

0.11 - x = 0.052

x = 0.11 - 0.052

x = 0.058 M

The expression of $K_c$ will be,

$K_c=\frac{[HI]^2}{[H_2][I_2]}$

$54.3=\frac{(C+2(0.058))^2}{(0.052)\times (0.052)}$

By solving the terms, we get:

C = 0.27 M

Thus, initial concentration of HI = C = 0.27 M

Thus, the concentration of $HI$ at equilibrium = (C+2x) = 0.27 + 2(0.058) = 0.386 M

3 0

4 years ago

Which state of matter is characterized by having an indefinite shape, but a definite volume?.

harkovskaia [24]

Answer:

A liquid

Explanation:

Liquids has an indefinite shape, which means it could change from one shape to another. For example, if you pour water into a rectangular fish tank. The shape of the liquid changes into a rectangle. Definite volume means its volume is consistent and that it is unchangeable. If you fill the rectangular fish tank with water, the volume of the water stays the same even though it changes shape.

Hope this helps.

7 0

3 years ago