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3 years ago

Is dynamite an atom or a molecule?

Chemistry

2 answers:

kkurt [141]3 years ago

4 0

Answer:

TNT is a molecule

Explanation:

777dan777 [17]3 years ago

4 0

Neither? TNT is a molecule

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The entropy of a system at 337 K increases by 221.7 J/mol•K. The free energy value is found to be –717.5 kJ/mol. Calculate the c

OlgaM077 [116]

Answer: The change in enthalpy for the given system is -642.8 kJ/mol

Explanation:

To calculate the change in enthalpy for given Gibbs free energy, we use the equation:

$\Delta G=\Delta H-T\Delta S$

where,

$\Delta G$ = Gibbs free energy = -717.5 kJ/mol = -717500 J/mol (Conversion factor: 1 kJ = 1000 J)

$\Delta H$ = change in enthalpy = ?

T = temperature = 337 K

$\Delta S$ = change in entropy = 221.7 J/mol.K

Putting values in above equation, we get:

$-717500J/mol=\Delta H-(337K\times 221.7J/mol.K)\\\\\Delta H=-642787J/mol=-642.8kJ/mol$

Hence, the change in enthalpy for the given system is -642.8 kJ/mol

4 0

4 years ago

A compound needed for photosynthesis

Pavel [41]

Answer:

Carbon dioxide as well as water are needed for photosynthesis.

Explanation:

8 0

3 years ago

A hypothetical element x has 3 naturally occurring isotopes: 41.20% of 21x, with an atomic weight of 21.016 amu, 50.12% of 22x,

iogann1982 [59]

The average atomic weight is calculated by adding up the products of the percentage abundance and atomic weight. In this item, we have the equation,

A = (0.412)(21.016 amu) + (0.5012)(21.942 amu) + (0.0868)(23.974 amu)

Simplifying the operation will give us the answer of 21.74 amu.

Answer: 21.74 amu

4 0

4 years ago

3. You measure a cube and determine that its sides are 0.65m. You place the cube on a mass scale and determine that this cube ha

amid [387]

The density of the cube in-

Kg/m³= 38.234 kg/m³

g/mL= 0.038234 g/mL

Explanation:

We know that volume of the cube equals m ³

Where “m” equals side of the cube

Given data-

Side of the cube=0.65m

mass of the cube= 10,500 gm

We know that 1000gm= 1 kg

Hence, 10,500 gm= 10.5 kg

Volume of the cube= (0.65)³

∴ Volume= 0.274625 m ³

We know that density = mass/volume

⇒Substituting the value of mass and volume, we get-

⇒Density= 10.5/0.274625= 38.234 kg/m³

We know that 1 kg/m³= 0.001 g/mL

Hence 38.234 kg/m³ would equal 0.038234 g/mL

Hence the density of the cube is 38.234 kg/m³ and 0.038234 g/mL

7 0

3 years ago

A solution's hydrogen ion concentration is 1 x 10-5M. What is the pH?

Nastasia [14]

Answer:

pH=5

Explanation:

-log(1 x 10-5)=5

4 0

3 years ago