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trapecia [35]
3 years ago
6

What is the ph of a solution with a hydroxide ion, oh−, concentration of 5.4 x 10−4 m?

Chemistry
1 answer:
DIA [1.3K]3 years ago
7 0
POH = -log[OH-]
pH + pOH = 14 (at 25 degrees celsius)

pOH = -log(5.4*10^-4) = 3.27 

pH = 14 - 3.27 = 10.73

The pH of a solution with a hydroxide ion concentration of 5.4*10^-4 M is 10.73.
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An element has an atomic number of 29. The number of protons and electrons in a neutral atom of the element are *
nasty-shy [4]

<em>The number of protons and electrons in a neutral atom of the element are;</em>

D. 29 protons and 29 electrons

<u>The atomic number of an element is equal to the number of protons in the nucleus of each atom of that element.</u>

<u>Thus copper has an atomic number of 29, all atoms of copper will have 29 protons.</u>

8 0
3 years ago
Cora, an electrician, wraps a copper wire with a thick plastic coating. What is she most likely trying to do? keep the electric
Alekssandra [29.7K]

Answer: keep a current from passing out of the wire

Explanation: plastic is an insulator and will not conduct electricity

3 0
4 years ago
Read 2 more answers
Calculate the number of atoms of copper represented by 127.08 g of copper.
frosja888 [35]
The molar mass of copper is 63.55 g/mol. So, you convert grams to moles 127.08/63.55 =1.999 moles copper. Now, 1 mole = 6.022e23 atoms, so multiply # of moles by 6.022e23. 1.999 x 6.022e23= # of atoms of copper.
7 0
4 years ago
Write a c++ program that prints the intial letter of any name​
Masteriza [31]

Answer:

please mark as brainliest!!

Explanation:

// C++ program to print initials of a name  

#include <bits/stdc++.h>  

using namespace std;  

 

void printInitials(const string& name)  

{  

   if (name.length() == 0)  

       return;  

 

   // Since touuper() returns int, we do typecasting  

   cout << (char)toupper(name[0]);  

 

   // Traverse rest of the string and print the  

   // characters after spaces.  

   for (int i = 1; i < name.length() - 1; i++)  

       if (name[i] == ' ')  

           cout << " " << (char)toupper(name[i + 1]);  

}  

 

// Driver code  

int main()  

{  

   string name = "prabhat kumar singh";  

   printInitials(name);  

   return 0;  

}

6 0
3 years ago
Read 2 more answers
ANSWER QUICK PLEASE AND THANK YOU
madreJ [45]

One oxygen atom shares two electron with two hydrogen atoms in this way water molecules are formed. The bond between oxygen and hydrogen is covalent bond.

<h3>What is covalent bond ?</h3>

An electron exchange that results in the formation of electron pairs between atoms is known as a covalent bond. Bonding pairs or sharing pairs are the names given to these electron pairs.

Covalent bonding is the stable equilibrium of the attractive and repulsive forces between atoms when they share electrons.

According to the amount of shared electron pairs, there are three different forms of covalent bonds. single covalent bond is one type of covalent bond. covalent double bond and covalent triple bond.

Thus, option B is correct .

To learn more about covalent bond follow the link ?

brainly.com/question/10777799

#SPJ1

8 0
1 year ago
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