2 years ago

Does Moseley's assertions about the arrangement of elements _________ Mendeleev's earlier work on the periodic table?

1 answer:

7 0

I believe it’s discarded because Moseley rearranged the elements by the number of protons is instead of atomic weight like Mendeleev did

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A carbon atom with 6 protons, 6 electrons, and 6 neutrons would have a mass number of

Nata [24]

12, electrons dont have mass. only protons and neutrons do

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3 years ago

A 17.4 L sample of oxygen gas (O2) was collected at a temperature of 23.0°C and a pressure of 2.18 atmospheres. What volume woul

timofeeve [1]

The volume of the gas at STP = 35.01 L

<h3>Further explanation</h3>

Conditions at T 0 ° C and P 1 atm are stated by STP (Standard Temperature and Pressure).

In general, the gas equation can be written

$\large {\boxed {\bold {PV = nRT}}}$

where

P = pressure, atm

V = volume, liter

n = number of moles

R = gas constant = 0.08206 L.atm / mol K

T = temperature, Kelvin

V=17.4 L

T = 23 + 273 = 296 K

P = 2.18 atm

$\tt mol=n=\dfrac{PV}{RT}\\\\n=\dfrac{2.18\times 17.4}{0.082\times 296}\\\\n=1.563$

The volume of the gas occupy at STP :

$\tt 1.563\times 22.4=35.01~L$

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2 years ago

Besides two molecules of pyruvate, what are the net products of glycolysis?

navik [9.2K]

The answer is 2 ATP and 2 NADH.

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2 years ago

name a household substance that could lower the pH of water leaving your home? increase the pH of water leaging your home? and w

Lady_Fox [76]

Bleach would increase the pH because Bleach is a basic substance with a pH of about 12

Soda would lower the pH because the pH of sodas is somewhere around 2.5 (this is for coke, other sodas are a bit different)

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2 years ago

3. Which of the following phase changes requires energy to happen?

nydimaria [60]

Answer:

??i do know may i ask some questions?

3 0

2 years ago

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