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3 years ago

What block does sodium belong to

2 answers:

6 0

Sodium is a Group 1 element (or IA in older labelling styles). Group 1 elements are often referred to as the "alkali metals". The chemistry of sodium is dominated by the +1 ion Na+.

Hope this helped .

tiny-mole [99]3 years ago

6 0

Answer:

out of the 4 blocks, sodium belongs to the s-block.

Hope this helps!

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A student is trying to identify an unknown mineral sample. The sample has a mass of 150 g and displaces 30 mL of water. Which mi

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Pyrite (density=5 g/cm

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2 years ago

calculate the mass of butane needed to produce 64.1 g of carbon dioxide to three significant figures and appropriate units

cricket20 [7]

Answer:

21.2 gm

Explanation:

calculate the mass of butane needed to produce 64.1 g of carbon dioxide to three significant figures and appropriate units

butane is the hydrocarbon C4H10

in combustion, we react hydrocarbons with O2 to form CO2 and H2O

C4H10 + O2----------------> CO2 + H2O

BALANCE

2C4H10 + 1302--------> 8CO2 + 10 H2O

the molar mass of CO2 is 12 + 16X2 = 44

64.1 gm of CO2 is

64.1/44 = 1.46 MOLES OF CO2,

FOR EVERY 8 MOLES OF CO2 WE NEED 2 MOLES OF BUTANE IT IS A

8:2 OR 4:1 RATIO. THE MOLES OF C4H10 ARE 1/4 THE MOLES OF CO2

THE MOLES OF C4H10 H10 ARE 1.46/4 =0.365 MOLES

THE MOLAR MASS OF BUTANE IS 58.12

0.365 MOLES OF C4H10 HAS A MASS OF 0.365 X 58.12 = 21.2 gm

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3 years ago

What function does the central vacuole in a plant cell performs

garri49 [273]

It functions to maintain the proper pressure within the plant cells to provide structure

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3 years ago

To calculate the molarity of a solution you need to know the moles of solute and the

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Volume of solution in liters

3 0

3 years ago

Read 2 more answers

What information about a chemical solution can be inferred from knowing its pH value?

Pepsi [2]

Answer:

See the answer below

Explanation:

The information than can be inferred from knowing the pH value of a chemical solution is the hydrogen or hydroxyl ion concentration of the solution.

The pH of a solution is the degree of acidity or alkalinity of the solution. Mathematically, the pH of a solution is expressed as:

pH = $-log_{10}[H^+]$ where $[H^+]$ = hydrogen ion concentration.

Also,

pH = 14 - pOH, where pOH = $-log_{10}[OH^-]$

The more the $[H^+]$ of a solution, the lower the pH, and the more the $[OH^-]$ of a solution the higher the pH. The pH value ranges from 0 - 14 with 7 being a neutral pH.

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4 years ago