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andrezito [222]
4 years ago
14

How many kilograms of solvent (water) must 0.71 moles of KI be dissolved in to produce a 1.93 m solution?

Chemistry
1 answer:
GalinKa [24]4 years ago
6 0

Answer: kg= 0.37

Explanation:

Use the molality formula.

M= m/kg

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Which of the following are strong electrolytes? Hcl hc2h3o2 nh3 kcl
Arturiano [62]
<h3><u>Answer;</u></h3>

HCl and KCl

<h3><u>Explanation</u>;</h3>
  • Strong electrolytes are strong bases and acids.
  • HCl is a strong acid; it dissociates completely to form H+ and Cl- ions. Thus, it is a strong, rather than weak, electrolyte.
  • CH3COOH is acetic acid, a weak acid. Only some of it will dissociate (to H+ and acetate ions), thus, it will only be a weak electrolyte.
  • NH3 will react with water as a weak base: NH3 + H2O → NH4+ + OH-. It will thus also be a weak electrolyte.  
  • KCl is a soluble ionic compound, and as such, it will be a strong electrolyte.
5 0
3 years ago
Read 2 more answers
How do we determine the number of electrons?
Umnica [9.8K]
Assuming it has no electrical charge, your electron count would be equal to the atomic number.
8 0
3 years ago
A sample of 7.34 g of solid calcium hydroxide is added to 34.5 mL of 0.380 M Aqueous hydrochloric acid.Write the balanced chemic
oksian1 [2.3K]

Answer: Ca(OH)_2(s)+2HCl(aq)\rightarrow CaCl_2(aq)+2H_2O(l)

Explanation:

A double displacement reaction is one in which exchange of ions take place. The salts which are soluble in water are designated by symbol (aq) and those which are insoluble in water and remain in solid form are represented by (s) after their chemical formulas.  

A double displacement reaction in which one of the product is formed as a solid is called as precipitation reaction.  

The balanced chemical equation is:

Ca(OH)_2(s)+2HCl(aq)\rightarrow CaCl_2(aq)+2H_2O(l)

6 0
3 years ago
Which element in Group 15 has the strongest metallic character
mihalych1998 [28]
Bi (Bismuth), will have the strongest metallic character, as it is the last element in group 15.
3 0
3 years ago
Given the following information: Mass of proton = 1.00728 amu Mass of neutron = 1.00866 amu Mass of electron = 5.486 × 10^-4 amu
lesya692 [45]

<u>Answer:</u> The nuclear binding energy of the given element is 2.938\times 10^{12}J/mol

<u>Explanation:</u>

For the given element _3^6\textrm{Li}

Number of protons = 3

Number of neutrons = (6 - 3) = 3

We are given:

m_p=1.00728amu\\m_n=1.00866amu\\A=6.015126amu

M = mass of nucleus = (n_p\times m_p)+(n_n\times m_n)

M=[(3\times 1.00728)+(3\times 1.00866)]=6.04782amu

Calculating mass defect of the nucleus:

\Delta m=M-A\\\Delta m=[6.04782-6.015126)]=0.032694amu=0.032694g/mol

Converting this quantity into kg/mol, we use the conversion factor:

1 kg = 1000 g

So,  0.032694g/mol=0.032694\times 10^{-3}kg/mol

To calculate the nuclear binding energy, we use Einstein equation, which is:

E=\Delta mc^2

where,

E = Nuclear binding energy = ? J/mol

\Delta m = Mass defect = 0.032694\times 10^{-3}kg/mol

c = Speed of light = 2.9979\times 10^8m/s

Putting values in above equation, we get:

E=0.032694\times 10^{-3}kg/mol\times (2.9979\times 10^8m/s)^2\\\\E=2.938\times 10^{12}J/mol

Hence, the nuclear binding energy of the given element is 2.938\times 10^{12}J/mol

3 0
3 years ago
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