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GuDViN [60]
2 years ago
15

Jennifer and Cody are mixing substances during a lab experiment. They observe the four effects listed below. Which of these effe

cts indicates that a chemical reaction has taken place between two substances?
A pink powdered substance turns water pink when they are mixed together.

A piece of shiny metal begins to bubble when placed in a clear liquid.

A white solid disappears when mixed with water.

A clear, lemon-scented liquid continues to smell like lemon when it is mixed with water.
Chemistry
1 answer:
mr_godi [17]2 years ago
4 0

Answer:

number 2

Explanation:

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Substances have more kinetic energy in the _______ state than in the _______ state.
lions [1.4K]

Answer:

Substances have more kinetic energy in the gas state than in the Solid state.

Gas have more kinetic energy as it flows from here and there.It flows really fast as it have less space between the molecules

Solids have less Kinetic energy as it is hard and can't flow so easily like gas . It has tightly packed molecules

5 0
2 years ago
What is the name of the process during which a bond between two monomers is broken?
Snezhnost [94]

Answer: D, hydrolysis

Hydrolysis is any chemical reaction in which a molecule of water ruptures one or more chemical bonds. The term is used broadly for substitution, elimination, and fragmentation reactions in which water is the nucleophile.

8 0
2 years ago
Given the following information, what is the concentration of H2O(g) at equilibrium? [H2S](eq) = 0.671 M [O2](eq) = 0.587 M Kc =
MAVERICK [17]

<u>Answer:</u> The equilibrium concentration of water is 0.597 M

<u>Explanation:</u>

Equilibrium constant in terms of concentration is defined as the ratio of concentration of products to the concentration of reactants each raised to the power their stoichiometric ratios. It is expressed as K_{c}

For a general chemical reaction:

aA+bB\rightleftharpoons cC+dD

The expression for K_{eq} is written as:

K_{c}=\frac{[C]^c[D]^d}{[A]^a[B]^b}

The concentration of pure solids and pure liquids are taken as 1 in the expression.

For the given chemical reaction:

2H_2S(g)+O_2(g)\rightleftharpoons 2S(s)+2H_2O(g)

The expression of K_c for above equation is:

K_c=\frac{[H_2O]^2}{[H_2S]^2\times [O_2]}

We are given:

[H_2S]_{eq}=0.671M

[O_2]_{eq}=0.587M

K_c=1.35

Putting values in above expression, we get:

1.35=\frac{[H_2O]^2}{(0.671)^2\times 0.587}

[H_2O]=\sqrt{(1.35\times 0.671\times 0.671\times 0.587)}=0.597M

Hence, the equilibrium concentration of water is 0.597 M

8 0
3 years ago
Chris drew a diagram to compare the ways in which
Rudik [331]

Answer:

Eat other organisms

Explanation:

7 0
2 years ago
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How does density relate to the cold and warm air masses?
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Warmer  air   is   less  dense  than  cold air.As  air  warm  it  rises  while  the  cold  air  sink. Warmer  air  masses forces the  cooler  air to  move  which  causes  wind.  These  is  illustrated  when  you  open  a hot oven the  hotter  air  inside  the  oven  rises  into  cooler  air  outside  the  oven.
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