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Allushta [10]
4 years ago
13

Which three elements have the most similar chemical properties

Chemistry
2 answers:
ahrayia [7]4 years ago
8 0

Answer:

K, Rb and Cs

Explanation:

Fittoniya [83]4 years ago
7 0

Answer:

krypton, bromine, and argon

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Compare the type of bonds in metalloids to metal (delocalized) and nonmetal (localized).
expeople1 [14]

1) The type of bond in metalloids to metal is metallic bond.

Metallic bond is a type of chemical bond.  

Metallic bond is formed between electrons and positively charged metal ions.

Metallic radius is defined as one-half of the distance between the two adjacent metal ions.  

Metallic bond increace electrical and thermal conductivity.  

Metals conduct heat, because when free moving electrons gain energy (heat) they vibrate more quickly and can move around.  

2) The type of bond in nonmetal is covalent bond.

Nonmetals have low electrical and thermal conductivity.


6 0
3 years ago
A chemist prepares a solution of magnesium chloride MgCl2 by measuring out 49.mg of MgCl2 into a 100.mL volumetric flask and fil
Flura [38]

Answer:  Molarity of Cl^- anions in the chemist's solution is 0.0104 M

Explanation:

Molarity : It is defined as the number of moles of solute present per liter of the solution.

Formula used :

Molarity=\frac{n\times 1000}{V_s}

where,

n= moles of solute

Moles=\frac{\text{Given mass}}{\text{Molar mass}}=\frac{0.049g}{95g/mol}=5.2\times 10^{-4}moles  

V_s = volume of solution in ml = 100 ml

Now put all the given values in the formula of molarity, we get

Molarity=\frac{5.2\times 10^{-4}moles\times 1000}{100ml}=5.2\times 10^{-3}mole/L

Therefore, the molarity of solution will be 5.2\times 10^{-3}mole/L

MgCl_2\rightarrow Mg^{2+}+2Cl^-

As 1 mole of MgCl_2 gives 2 moles of Cl^-

Thus 5.2\times 10^{-3}  moles of MgCl_2 gives =\frac{2}{1}\times 5.2\times 10^{-3}=0.0104

Thus the molarity of Cl^- anions in the chemist's solution is 0.0104 M

6 0
3 years ago
I will give thanks, profile thanks, brainliest and 5 star
liubo4ka [24]

Answer: E.) C2N2H8

Explanation:

4 0
3 years ago
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Equal volumes of H2 and O2 are placed in a balloon and then ignited. Assuming that the reaction goes to completion, which gas wi
Sonbull [250]

Answer: Oxygen

Explanation:

2H_2+O_2\rightarrow 2H_2O

As seen from the balanced equation:

2 moles of hydrogen combine with 1 mole of oxygen or 1 mole of hydrogen combine with 1/2 mole of oxygen.

According to Avogadro's law, equal volumes of gases contain equal number of molecules and hence equal number of moles.

Thus if x moles of both gases are present, x moles of hydrogen will combine with \frac{x}{2} moles of oxygen and  x-\frac{x}{2}=\frac{x}{2} moles of oxygen will be left used and will be in excess.

7 0
3 years ago
If 123 ml of a 1. 1 m glucose solution is diluted to 500. 0 ml, what is the molarity of the diluted solution?
Ludmilka [50]

The molarity of the diluted solution is 0.2706 M.

Given,

M₁ = 1.1 M

V₁ = 123 mL

V₂ = 500.0 mL

The dilution law formula is M₁V₁ = M₂V₂

1.1*123=M₂*500

M₂=0.2706 M

<h3 /><h3>Molarity </h3>

Molarity, a concentration unit used in chemistry, is determined by dividing the number of moles of a solute by the number of liters of solution. The phrase "molar concentration" (also known as "molarity," "amount concentration," or "substance concentration") refers to the amount of a substance per unit volume of solution and is used to describe the concentration of a chemical species, specifically a solute, in a solution. The most frequent measure of molarity in chemistry is the number of moles per liter, denoted by the unit symbol mol/L or mol/dm3 in SI units. A solution with a concentration of 1 mol/L is referred to as 1 molar, or 1 M.

Learn more about Molarity here:

brainly.com/question/2817451

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6 0
2 years ago
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