2 years ago

Some of the physical changes

1 answer:

6 0

when liquid is cooled it gets converted into its solid form. so,in this the condition is being reversed.so it is reversible change. Similarly,liquid when heated it gets converted into its gaseous form. when,gas is cooled,it gets converted into its liquid form

I think answer is B

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Look at the element in group 12, period 4. Hover your mouse over the element to see more about it. Then fill in the following in

Svetlanka [38]

Answer:

name: zinc

symbol: Zn

atomic number: 30

number of protons: 30

atomic weight: 65.38 atomic mass units

I hope this helps!

4 0

3 years ago

A beaker contains 175.32g of salt, NaCl(58.44g/mol). Water is added until the final volume is 2 liters. The solution should be d

cricket20 [7]

Answer:

E. 1.5M

Explanation:

because there is total 175.32 g of NaCl dissolved in 2 liter of water, and 58.44 g = 1 mol

so total miles = 175.32/58.32 = 3 moles

now 3 moles are in 2 liter of water, hence one liter contains 3/2= 1.5

Therefore answer is E. 1.5M

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3 years ago

The ionization potential of Be atom is more than expected because it has -

Gre4nikov [31]

Answer:

(b) fully filled valence s orbitals

Explanation:

Electron configuration of Be: 1s22s2

2s2 is fully filled

6 0

2 years ago

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Neporo4naja [7]

Black hole is likely to spin

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3 years ago

An element has a half-life of 30 years. if 1.0 mg of this element decays over a period of 90 years, how many mg of this element

labwork [276]

Answer:

144.6

Explanation:

6 0

2 years ago