In the given question we need to convert 0.075 meter into centimeter. For this purpose we need to know the relation between meter and centimeter. Then only this problem can be solved and the correct answer reached.
Now we know that
1 meter = 100 centimeter
Then
0.075 meter = [(100/1) * 0.075] centimeter
We know that any number when divided by 1 gives the same number.
So
0.075 meter = (100 * 0.075) centimeter
= (100 * 75/1000) centimeter
= (7500/1000) centimeter
= (75/10) centimeter
= 7.5 centimeter.
So from all the given options the correct answer to the question is 7.5 centimeter.
Energy is directly proportional to frequency and energy inversely proportional to wavelength. Wavelength is inversely proportional to frequency.
You can use the periodic table to help you determine the charge of an element when it becomes an ion. You base this on the group 8 elements called the noble gases. You can determine the charge by finding the difference of the atomic numbers of the given element to their nearest noble gas. It is made easier for elements on the left side. You can take their charge to be their group number. Since calcium is in group 2A, it will have a charge of 2+. Since Na is in group 1A, it will have a charge of 1+. Since Phosphorus is a nonmetal, it will have a negative charge because it needs to gain electrons to achieve their nearest noble gas. Since the nearest noble gas is Argon having an atomic number of 18, while Phosphorus has an atomic number of 15:
Charge = 15 - 18 = -3
The charge of Phosphorus is -3.
Answer:
V₁ = 208.3 mL
Explanation:
Given data:
Initial molarity of HCl = 6.0 M
Final volume = 500 mL
Final molarity = 2.5 M
Volume of initial solution required = ?
Solution:
Formula:
M₁V₁ = M₂V₂
Now we will put the values in formula.
6.0 M × V₁ = 2.5 M ×500 mL
6.0 M × V₁ = 1250 M.mL
V₁ = 1250 M.mL / 6.0 M
V₁ = 208.3 mL