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3 years ago

14

Elements whose names end with âium are usually metals; sodium is one example. Identify a nonmetal whose name also ends with âium

.

1 answer:

Makovka662 [10]3 years ago

8 0

Answer: Helium (He) and Selenium (Se) both are non metals ends with ium sound

Explanation:

He is a inert gas and Se belongs to oxygen family (VI A group)

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The atomic number tells the number of positively charged __________ in the nucleus of an atom. the atom is __________ because th

zimovet [89]

Protons, neutral, negatively, electrons

5 0

3 years ago

The net ionic equation for formation of an aqueous solution of nii2 accompanied by evolution of co2 gas via mixing solid nico3 a

Ann [662]

Answer:

NiCO3 (s) + 2H+ (aq) → H2O (l) + CO2 (g) + Ni2+ (aq)

Explanation:

To write the complete ionic equation:

1. Start with a balanced molecular equation.

2. Break all soluble strong electrolytes (compounds with (aq) beside them) into their ions

3. indicate the correct formula and charge of each ion

4. indicate the correct number of each ion

5. write (aq) after each ion

6. Bring down all compounds with (s), (l), or (g) unchanged.

8 0

3 years ago

solution is 2.41 molal toluene (C 7H 8, 92 g/mol) in benzene (C 6H 6, 78 g/mol); i.e. consider toluene the solute, benzene the s

inn [45]

Answer : The molarity of solution is, 1.73 mole/L

Explanation :

The relation between the molarity, molality and the density of the solution is,

where,

$d=M[\frac{1}{m}+\frac{M_b}{1000}]$

d = density of solution = $0.876g/cm^3=0.876g/mL$

m = molality of solution = 2.41 mol/kg

M = molarity of solution = ?

$M_b$ = molar mass of solute (toluene) = 92 g/mole

Now put all the given values in the above formula, we get the molality of the solution.

$0.876g/ml=M\times [\frac{1}{2.41mol/kg}+\frac{92g/mole}{1000}]$

$M=1.73mol/L$

Therefore, the molarity of solution is, 1.73 mole/L

7 0

3 years ago

Most warm-water ocean currents move away from the equator and toward the poles because warm water is driven by ______ from _____

aksik [14]

convection; hot; cold

Hope This Work

6 0

4 years ago

5 x 10^25 atoms of nickel equal how many moles

Rom4ik [11]

1 mole Ni ------------- 6.02x10²³ atoms
?? moles Ni ----------- 5x10²⁵ atoms

1 x ( 5x10²⁵ ) / 6.02x10²³ =

=> 83.05 moles

3 0

3 years ago