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Lelu [443]
3 years ago
13

Erosion occurs when natural forces alter a landscape. What does it mean to alter a landscape?

Chemistry
1 answer:
lidiya [134]3 years ago
7 0
Alter means change. So when a wave hits a big rock, the rock sheds a tiny bit, creating sand.

hope this helped! Please put this as a brainliest answer
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Why the statement all atoms of one element have the same mass is false
White raven [17]
Some elements have isotopes which have a different number of neutrons, and this means they have different masses.
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3 years ago
The constant
Zigmanuir [339]

Answer:

75 kJ/mol

Explanation:

The reactions occur at a rate, which means that the concentration of the reagents decays at a time. The rate law is a function of the concentrations and of the rate constant (k) which depends on the temperature of the reaction.

The activation energy (Ea) is the minimum energy that the reagents must have so the reaction will happen. The rate constant is related to the activation energy by the Arrhenius equation:

ln(k) = ln(A) -Ea/RT

Where A is a constant of the reaction, which doesn't depend on the temperature, R is the gas constant (8.314 J/mol.K), and T is the temperature. So, for two different temperatures, if we make the difference between the two equations:

ln(k1) - ln(k2) = ln(A) - Ea/RT1 - ln(A) + Ea/RT2

ln (k1/k2) = (Ea/R)*(1/T2 - 1/T1)

k1 = 8.3x10⁸, T1 = 142.0°C = 415 K

k2 = 6.9x10⁶, T2 = 67.0°C = 340 K

ln(8.3x10⁸/6.9x10⁶) = (Ea/8.314)*(1/340 - 1/415)

4.8 = 6.39x10⁻⁵Ea

Ea = 75078 J/mol

Ea = 75 kJ/mol

4 0
3 years ago
PLZ ANSWER FOR BRAINLIEST
soldi70 [24.7K]

Answer:

C

Explanation:

The ozone layer absorbs ultraviolet rays from the sun.

5 0
3 years ago
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The columns in the periodic table are called groups. What do the elements in group 17 have in common?
natita [175]

Answer:

All of the elements in group 17 all have 7 valence electrons. This is one thing they all share in common.

Explanation:

7 0
3 years ago
How many valence electrons does aluminum have.
Marysya12 [62]

Answer:

3 valence electrons

Explanation:

Aluminum has three valence electrons. Valence electrons are found in the outermost shell of an element and are responsible for its valence.

4 0
3 years ago
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