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3 years ago

HELPPPPPPPPPPPPPPPPPPPPPPPP MEEHHHHHHHHHHHHHH

Chemistry

1 answer:

AnnZ [28]3 years ago

4 0

Here you are looking on the Free Body diagram of a net force of 0N in both the x and y-directions. the only ones that has that condition met is A and C.

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n the diagram shown, when an object ‘X’ is brought near the ring shaped magnet, the magnet moves away from it. Four friends are

kati45 [8]

Answer:

Akash

Explanation:

it could be a magnet with the same poles facing eachoher

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2 years ago

How many electrons in a ground-state As atom in the gas

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One electron is the answer if you need work i can show

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3 years ago

Ants live in the hollow thorns of an acacia tree. The tree provides food and shelter for the ants. The ants protect the tree fro

AfilCa [17]

A. Mutualism

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2 years ago

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The rate constant k for a certain reaction is measured at two different temperatures:

bogdanovich [222]

Answer:

Ea=5.5 Kcal/mole

Explanation:

Let rate constant are $K_1$ and $K_2$ at temperature $T_1$ and $T_2$

By using Arrhenius equation at two different two different temperature,

$Log K_1/K_2 =E_a/2.303R*(1/T_2 -1/T_2 );T_1=273+376=649K ;K_1=4.8*10^8;T_2=273+280=553K ;K_2=2.3*10^8;R=2 cal/(mole.K);Log (4.8*10^8)/(2.3*10^8 )=E_a/2.303R*(1/553K-1/649); Log 4.8/2.3=E_a/2.303R*96/358897 ;0.32=E_a/2.303R*96/358897;E_a=(0.32*2.303R*358897)/96;$

By putting value of R=2 cal/mole.K

$E_a=5510.265cal/mole;$

By rounding off upto 2 significant figure;

$E_a=5.5Kcal/mole;$

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3 years ago

if a substance is melted from a solid into a liquid, what property of the substance would also be effected? select all that appl

katen-ka-za [31]

Answer is: density of the substance, energy of the substance, intermolecular bonds between particles.

Melting is a physical change (process), the same substance is present before and after the change, so chemical bonds and melting point of the substance are not changed.

Density of liquids are usually less than in solids, because atoms are further apart.

Liquids have higher energy and atoms or molecules move faster.

Intermolecular bonds are weaker in liquids.

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3 years ago

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