3 years ago

A ___________________ is a combination of two or more atoms that are held together by covalent bonds.

Chemistry

2 answers:

Andre45 [30]3 years ago

3 0

The answer is Molecule

frosja888 [35]3 years ago

3 0

The answer is molecules.

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The rate constant for the first-order decomposition of n2o is 3.40 s-1. what is the half-life of the decomposition?

stiks02 [169]

Hey There:

First order half life equation :

T 1/2 = ln ( 2 ) /K

T 1/2 = 0.693 / 3.40

T 1/2 = 0.204 s

Answer B

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3 years ago

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How does the rate of reaction proceed with time

Studentka2010 [4]

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3 years ago

State and Explain the trend in the atomic radius down a group

balu736 [363]

Explanation:

<h2>The number of energy levels (n) increases, so there is a greater distance between the nucleus and the outermost orbital.</h2>

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1 year ago

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kkurt [141]

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3 years ago

A 32.5 g iron rod, initially at 22.4 ∘C, is submerged into an unknown mass of water at 63.0 ∘C, in an insulated container. The f

a_sh-v [17]

Answer:

$m_{H_2O}=39.0g$

Explanation:

Hello,

In this case, is possible to infer that the thermal equilibrium is governed by the following relationship:

$\Delta H_{iron}=-\Delta H_{H_2O}\\m_{iron}Cp_{iron}(T_{eq}-T_{iron})=-m_{H_2O}Cp_{H_2O}(T_{eq}-T_{H_2O})$

Thus, both iron's and water's heat capacities are: 0.444 and 4.18 J/g°C respectively, so one solves for the mass of water as shown below:

$m_{H_2O}=\frac{m_{iron}Cp_{iron}(T_{eq}-T_{iron})}{-Cp_{H_2O}(T_{eq}-T_{H_2O}} \\\\m_{H_2O}=\frac{32.5g*0.444\frac{J}{g^0C}*(59.7-22.4)^0C}{-4.18\frac{J}{g^0C}*(59.7-63.0)^0C} \\\\m_{H_2O}=39.0g$

Best regards.

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3 years ago