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3 years ago

9

A book rests on a table. The book pushes downward on the table with a force of 8N. According to Newton's 3rd Law of Motion, what

prevents the book from accelerating downward?

1 answer:

Tems11 [23]3 years ago

7 0

Answer:

The table is preventing the book from accelerating downwards.

Explanation:

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Is there a way of knowing the charges of transitional elements other than to memorize them?

romanna [79]

Explanation:

To determine the charge on a given transition metal atom, you have to consider what element it is, the charges on the other atoms in the molecule, and the net charge on the molecule itself. The charges are always whole numbers, and the sum of all the atomic charges equals the charge on the molecule

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2 years ago

Which statement is not true regarding nuclear reactions? Alpha, beta, and gamma are types of radiation. Nuclear reactions involv

svet-max [94.6K]

Alpha I believe not sure

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3 years ago

NItrogen in air reacts at high temperature to form NO2 according to the reaction:

Rina8888 [55]

Answer:

The correct answer is option E.

Explanation:

Structures for the reactants and products are given in an aimage ;

Number of double bonds in oxygen gas molecule = 1

Number of double bonds in nitro dioxide gas molecule = 1

Number of single bond in in nitro dioxide gas molecule = 1

Number of triple bonds in nitrogen gas molecule = 1

$N_2+2O_2\rightarrow 2NO_2,\Delta H=?$

$\Delta H=[2 mol\times \Delta H_{f,NO_2}]-[1 mol\times \Delta H_{f,N_2}-2 mol\times \Delta H_{f,O_2}]$

$\Delta H_{f,NO_2}=33.18 kJ/mol$

$\Delta H_{f,N_2}=0$ (pure element)

$\Delta H_{f,O_2}=0$ (pure element )

$\Delta H=2 mol\times 33.18 kJ/mol=66.36kJ=15.86 kcal$

The enthalpy of the given reaction is 15.86 kcal.

6 0

4 years ago

Wich scientist is credited with developing the first scientific atomic theory

Fantom [35]

Answer:

john dalton

Explanation:

8 0

3 years ago

Which statement explains the process of a chemical reaction? A. Substances are mixed together, producing a homogeneous mixture.

ololo11 [35]

The answer is D: Products combine to produce new reactants... Hope this helps! :)

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3 years ago

Read 2 more answers