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1 year ago

ANYONE PLEASE HELP ME WITH MY CHEMISTRY HOMEWORK I REALLY NEED THE ANSWER RIGHT NOW I HOPE Y’ALL CAN HELP ME:(

Chemistry

1 answer:

stealth61 [152]1 year ago

6 0

2. They all have 1 valence electron, they form ions with a +1 charge.

3. cation

4. Lithium, Li

5. Francium, Fr

6. Cesium has a melting point of 28.5 C so I’m assuming that’s the correct answer, Francium is radioactive

7. Sodium, Rubidium, Lithium, and Cesium are all soft metals that can be cut with a knife.

8. Oxygen

9. Hydrogen gas

10. Bases

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The set of chemical and physical properties of a ______ are different from those of its constituents.

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Answer:

compound

Explanation:

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2 years ago

How many moles of O2 are needed to burn 2.56 moles of CH3OH?

lukranit [14]

Answer:

$n_{O_2}=3.84molO_2$

Explanation:

Hello!

In this case, since the combustion reaction of methanol is:

$CH_3OH+\frac{3}{2} O_2\rightarrow CO_2+2H_2O$

In such a way, since there is 1:3/2 mole ratio between methanol and oxygen, we can compute the moles of oxygen that are needed to burn 2.56 moles of methanol as shown below:

$n_{O_2}=2.56molCH_3OH*\frac{\frac{3}{2}molO_2}{1molCH_3OH} \\\\n_{O_2}=3.84molO_2$

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2 years ago

Approximately how many formula units of NaCl are in 116.88g of table salt (NaCl), knowing that the molar mass of NaCl is 58.44g/

elena-14-01-66 [18.8K]

Answer:

116.88g of table salt (NaCl) contains two formula units

Explanation:

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We know that 1 formula unit of sodium chloride has a molar mass of 58.44g/mol

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Mass of 1 formula unit = 58.44g

Mass of x formula units = 116.88g

x = 116.88g * 1 formula unit/58.44g

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116.88g of table salt (NaCl) contains two formula units

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2 years ago

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2 years ago