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3 years ago

Which information is sufficient to differentiate a

Chemistry

2 answers:

blagie [28]3 years ago

8 0

Answer: (3) The reactivity of each sample with water

Explanation: Since sodium dissolves in water, you could place the two elements in water and see which of the two dissolve

Novay_Z [31]3 years ago

3 0

"The reactivity of each sample with water" is sufficient to differentiate the sample of sodium from a sample of silver.

Explanation :

Silver does not undergo any reaction with water. Also, silver is insoluble in water under normal conditions. Thus it remains in its metallic state when it comes in contact with water.

On the other hand, sodium is highly reactive in water. It forms a colorless solution in water, which is basic. This basic solution is sodium hydroxide and hydrogen gas. The reaction of sodium and water is exothermic.

$2 N a(s)+2 H_{2} O \rightarrow 2 N a O H(a q)+H_{2}(g)$

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What is equal to the number of particles in 36 grams of carbon-12?

HACTEHA [7]

Answer:

3 moles

Explanation:

To solve this problem we will use the Avogadro numbers.

The number 6.022×10²³ is called Avogadro number and it is the number of atoms, ions or molecules in one mole of substance. According to this,

1.008 g of hydrogen = 1 mole = 6.022×10²³ atoms.

18 g water = 1 mole = 6.022×10²³ molecules

we are given 36 g of C-12. So,

12 g of C-12 = 1 mole

24 g of C-12 = 2 mole

36 g of C-12 = 3 mole

So 3 moles of C-12 equals to the number of particles in 36 g of C-12.

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3 years ago

PLEASE HELP ME! THANK YOU IF YOU DO!!! ^^

frozen [14]

Answer:

oceanic formation is the right answer.

Explanation:

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2 years ago

Which procedure could a student use to examine an intensive property of a rectangular block of wood

kirill [66]

An intensive property does not change when you take change when you take away some of the sample the producers that a student could use to examine the intensive property of a rectangular block of wood

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3 years ago

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Why do heart diseas patient's eat oil instead of fat?

7nadin3 [17]

Answer:

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3 years ago

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Boron has two naturally-ocurring isotopes. Boron-10 has an abundance of 19.8% and actual mass of 10.013 amu, and boron-11 has an

aniked [119]

Answer:

Average atomic mass = 10.812 amu

Explanation:

The formula for the calculation of the average atomic mass is:

$Average\ atomic\ mass=(\frac {\%\ of\ the\ first\ isotope}{100}\times {Mass\ of\ the\ first\ isotope})+(\frac {\%\ of\ the\ second\ isotope}{100}\times {Mass\ of\ the\ second\ isotope})$