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Levart [38]
3 years ago
14

2. If volume is increased, the number of collisions per second

Chemistry
1 answer:
Archy [21]3 years ago
4 0

Answer:

decreases

Explanation:

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What do many employers require of respiratory technician? Check all that apply.
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Answer:

1 & 4

Explanation:

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6 0
3 years ago
The enthalpy of combustion of naphthalene (MW = 128.17 g/mol) is -5139.6 kJ/mol. How much energy is produced by burning 0.8210 g
bazaltina [42]

The energy produced by burning : -32.92 kJ

<h3>Further explanation</h3>

Delta H reaction (ΔH) is the amount of heat change between the system and its environment

(ΔH) can be positive (endothermic = requires heat) or negative (exothermic = releasing heat)

The enthalpy and heat(energy) can be formulated :

\tt \Delta H=\dfrac{Q}{n}\rightarrow n=mol

The enthalpy of combustion of naphthalene (MW = 128.17 g/mol) is -5139.6 kJ/mol.

The energy released for 0.8210 g of naphthalene :

\tt Q=\Delta H\times n\\\\Q=-5139.6~kJ/mol\times \dfrac{0.8210~g}{128.17~g/mol}~\\\\Q=-32.92~kJ

3 0
3 years ago
A pure substance where atoms of two or more elements are chemically bonded to one another
inn [45]
Compound is a pure substance where atoms of two or more elements are chemically bonded togather
8 0
3 years ago
the latest weather report includes the following statement: the temperature is 78°f, barometric pressure is 29 and the relative
NeX [460]

Answer:

78

Explanation:

6 0
3 years ago
How many moles of oxygen gas are needed to produce 4 moles of carbon dioxide gas?
11111nata11111 [884]
Answer: 8 moles
Explanation:
Nc2H6= 4 mol
2C2H6 + 7O2 → 4CO2+6H2O
CO2=4/2⋅4
NCO2= 8 moles
( I write this on paper so the letters and format might be confusing) sorry!!
3 0
3 years ago
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