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4 years ago

One of these has a negative value for (triangle) H. select the correct one

Chemistry

1 answer:

hichkok12 [17]4 years ago

8 0

Answer:

The methane gas burns

Explanation:

The burning of methane gas is a combustion reaction. Combustion is an exothermic process. For all exothermic processes, ∆H is negative.

Combustion reaction involves the evolution of heat. The energy of reactants is greater than the energy of products hence the excess energy is given off in the form of heat leading to a negative value of the enthalpy of reaction, hence the answer.

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Convert a speed of 259 cm/s to units of inches per minute. Also, show the unit analysis by dragging components into the unit‑fac

igomit [66]

Answer:

$6118.11\frac{in}{min}$

Explanation:

Hello,

In this case, by knowing that 1 inch equals 2.54 cm and 60 seconds equals 1 min, the resulting value results:

$=259\frac{cm}{s}*\frac{1in}{2.54cm}*\frac{60s}{1min}\\ \\=6118.11\frac{in}{min}$

Best regards.

5 0

3 years ago

A six-carbon organic compound containing oxygen is suspected of being either a secondary alcohol or a ketone. which chemical or

White raven [17]

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3 years ago

In the ground state, which atom has a completely filled valence electron shell?(1) C (2) V (3) Ne (4)Sb

AVprozaik [17]

The answer is (3)Ne. Usually, the elements belongs to group 18 all have completely filled valence electron shell. Among the four elements carbon, vanadium, neon and antimony, only neon belongs to group 18.

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3 years ago

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A compound of mercury and oxygen is heated in order to decompose the compound. A 4.08 grams sample of mercury oxide upon heating

arlik [135]

Answer:

HgO (empirical formula)

Explanation:

4.08 - 3.78 = 0.3g (oxygen)

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0.02 : 0.02

0.02/0.02 : 0.02/0.02

1 : 1 (ratio)

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2 years ago

How many mg of O2 will react with the TNT?

Tanzania [10]

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3 years ago

One of these has a negative value for (triangle) H. select the correct one￼

One of these has a negative value for (triangle) H. select the correct one