The density of zinc is 7.16 g/ml.
Density can be calculated by the formula -
Density =
In the given question, the volume of given mass of mossy zinc can be found by finding change in volume of water.
Change in volume = new volume - original volume
Change in volume = 54.6 - 50.0
Performing subtraction to find the change in volume
Change in volume = 4.6 ml
Now, keeping the values in formula to find the density of given mass of mossy zinc.
Density =
Performing division to find the density of given mass of mossy zinc
Density = 7.16 g/ml
Hence, the density of mossy zinc is 7.16 g/ml.
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Temperature has to be at least below 34° for snow to fall and it has to be a day where rain would fall
((mass solute)/(mass solution)) * 100% =35%
mass CaCl2=0.35*352.5=123.4 g CaCl2
Answer:
Explanation:
Ionic compounds are formed by the positive and negative ions but over all compounds are neutral. Because total negative charges are equal to the positive charges and cancel the effect of each other.
For example:
sodium chloride is an ionic compound. It is made up of positive ion which Na⁺ and the negative ion which Cl⁻. The negative and positive charges are equal in magnitude thus cancel the effect of each other and make the compound over all neutral.
Na⁺Cl⁻ = NaCl
Another example:
Sodium carbonate: Na₂CO₃
This compound consist of cationic part which is Na⁺ and anionic part CO₃²⁻
In this compound carbonate have -2 charge while sodium have +1 charge . In order to balance the overall charges two sodium atoms are bonded with one carbonate unit. 2Na⁺ = +2 charge
thus,
Na₂²⁽⁺¹⁾CO₃²⁻ = Na₂CO₃
Answer:
mixtures
Explanation:
Mixtures contain two or more substances that are relatively easy to separate. The individual components of a mixture can be physically separated from each other.