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Rufina [12.5K]
3 years ago
12

The elements on the Periodic Table of the Elements are arranged in order of increasing

Chemistry
2 answers:
Alex787 [66]3 years ago
7 0

Answer:

The Atomic number increases....

Explanation:

Duh

Valentin [98]3 years ago
4 0

Answer: The Atomic Number increases. Hope this helps!!!

Explanation:

Elements are arranged from left to right and top to bottom in order of increasing atomic number. Order generally coincides with increasing atomic mass.

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please help me with Chem I ONLY HAVE 5 MINUTES if methane gas (CH4) flows at a rate of 0.25L/s, how many grams of methane gas wi
Nookie1986 [14]

Answer:

643g of methane will there be in the room

Explanation:

To solve this question we must, as first, find the volume of methane after 1h = 3600s. With the volume we can find the moles of methane using PV = nRT -<em>Assuming STP-</em>. With the moles and the molar mass of methane (16g/mol) we can find the mass of methane gas after 1 hour as follows:

<em>Volume Methane:</em>

3600s * (0.25L / s) = 900L Methane

<em>Moles methane:</em>

PV = nRT; PV / RT = n

<em>Where P = 1atm at STP, V is volume = 900L; R is gas constant = 0.082atmL/molK; T is absolute temperature = 273.15K at sTP</em>

Replacing:

PV / RT = n

1atm*900L / 0.082atmL/molK*273.15 = n

n = 40.18mol methane

<em>Mass methane:</em>

40.18 moles * (16g/mol) =

<h3>643g of methane will there be in the room</h3>
5 0
3 years ago
Which following statements is true?
Aleksandr-060686 [28]

Answer:

first one

Explanation:

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8 0
3 years ago
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(?)H2 + (?)O2 -----&gt; (?)H2O
kkurt [141]

Answer:

2 H2 +O2 = 2H2O

Explanation:

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What is hydrogenation
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