Number of copper atoms = moles of copper x Avogadro's number = 5.7x6.02x10^23 = 3.43x10^24 atoms.
Answer:
The correct option is e.
Explanation:
p-value is the probability value for a given statistical model, the probability that, when the null hypothesis is true.
For two two samples the formula of test statistics is
where,
is sample mean
is population mean.
is standard deviation.
n is sample size.
Variance is the square of standard deviation.
It means variance, mean, numbers of samples is used in calculation of p-value.
Degree of freedom define the shape of the t-distribution that your t-test uses to calculate the p-value.
p-value of a statistical test depends on all of the following, except median.
Therefore the correct option is e.
The electronic configuration of thallium lll ion is 4F^14 5D^10 and it has a charge of +3.
Thallium is a chemical element with the chemical symbol TI. Its atomic number is 81 and the atomic mass is 204. The charge of +3 implies that, the element will give away three electrons during the course of chemical reaction in order to attain stability.
Answer:
Should be number 4, quartz.
Explanation:
Quartz is rougher than calcite, therefore it's able to scratch it.
Answer:
V₁ = 0.342 M
Explanation:
Given data:
Volume of HClO₄ = 15.00 mL
Volume of NaOH = 25.64 mL
Molarity of NaOH = 0.2000 M
Molarity of HClO₄ = ?
Solution:
Formula:
M₁V₁ = M₂V₂
V₁ = M₂V₂ /M₁
V₁ = 0.2000 M ×25.64 mL /15.00 mL
V₁ = 5.128 M. mL /15.00 mL
V₁ = 0.342 M
