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4 years ago

What does the atomic number represent?

Chemistry

2 answers:

Mrrafil [7]4 years ago

8 0

Answer:

Explanation:

saw5 [17]4 years ago

3 0

C. The number of protons in the atoms nucleus.

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PLEASE HELP!! How could using either more or less of a chemical in a scientific experiment cause a change in results?

charle [14.2K]

The chemical could have more or less of a reaction to the other chemicals in the experiment

4 0

3 years ago

How many liters of carbon dioxide will 0.5 moles of lithium hydroxide (LiOH) absorb?

Elden [556K]

Answer : The volume of carbon dioxide will be, 5.6122 L

Solution : Given,

Moles of LiOH = 0.5 moles

Molar mass of carbon dioxide = 44 g/mole

Density of carbon dioxide = 0.00196 g/ml

First we have to calculate the mass of carbon dioxide.

The balanced reaction will be,

$2LiOH+CO_2\rightarrow Li_2CO_3+H_2O$

From the reaction we conclude that

As, 2 moles of LiOH absorbs 44 grams of carbon dioxide

So, 0.5 moles of LiOH absorbs $\frac{0.5moles}{2moles}\times 44g=11$ grams of carbon dioxide

Mass of carbon dioxide = 11 g

Density of carbon dioxide = 0.00196 g/ml

Now we have to calculate the volume of carbon dioxide.

$Density=\frac{Mass}{volume}$

$0.00196g/ml=\frac{11g}{volume}$

Volume of carbon dioxide = 5612.24 ml = 5.6122 L (1 L = 1000 ml)

Therefore, the volume of carbon dioxide will be, 5.6122 L

5 0

3 years ago

Two different samples of solid iron are shiny, can be made into wire, and can rust when exposed to water. Why do the two samples

Montano1993 [528]

Answer:

The two samples have identical properties because they are the samples of the same element. Intensive properties are properties of matter that do not change depending on the amount of matter. Luster, reactivity, and ductility are all intensive properties. That is why the two samples can be different sizes or shapes, but have identical properties.

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3 years ago

What is conditional reflexes??

SIZIF [17.4K]

Answer:

Actions that you have trained yourself to perform.

they are obtained by experience. they are not passed from generation. they can be learnt or abolished. Higher center's of brain is responsible for conditional reflexes

Explanation:

example riding a bike, swimming, typing

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4 years ago

Help me please <br> Look at the picture linked

____ [38]

Halogen--Florine

Chalogen-- Oxygen

Alkali Metal-- Sodium

Boron -- Metalloid (atomic symbol B)

Lanthanide series-- (Number 57-71 on periodic Table) Example: Cerium #58

Alkaline Earth Metal--Magnesium

Transition Metal-- Gold, Iron, Silver. Etc... (Middle section of a period table)

Nobel Gas--Helium

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3 years ago