Respond to this Question
Similar Questions

chemistry
Criticize the following statements. 1. In an ionic compound, the number of cations is always equal to the number of anions. [Is it ok to say 'not always'? 
Calculas
In the early 1960s, radioactive strontium90 was released during atmospheric testing of nuclear weapons and got into the bones of people alive at the time. If the halflife of strontium90 is 32 years, what fraction of the strontium90 … 
chemistry
Determine the number of bromide ions in solution when 4.23 g of magnesium bromide and 1.21 g of potassium bromide are dissolved in 120mL of water. Please explain not sure how to even start this problem, thanks! 
chemistry
Strontium has density of 2.64 and crystallizes with the facecentered cubic unit cell. Find the radius of the strontium atom 
Chemistry
The halflife for beta decay of strontium90 is 28.8 years. A milk sample is found to contain 10.3 ppm strontium90. How many years would pass before the strontium90 concentration would drop to 1.0 ppm? 
calculus
In the early 1960s, radioactive strontium90 was released during atmospheric testing of nuclear weapons and got into the bones of people alive at the time. If the halflife of strontium90 is 27 years, what fraction of the strontium90 … 
chemistry
If 50.0 mL of 0.150 M magnesium bromide is combined with 200 mL of 0.110 M sodium bromide what is the molarity of the bromide ion in the resulting solution? 
Chemistry
How many grams of a solid mixture containing strontium chloride would one need to make 558 mL of a 0.100 M strontium chloride solution, if the solid mixture contains 58.6% strontium chloride by weight 
Math
The element strontium90 is radioactive. The percent of strontium 90, A(t), left in a sample can be modelled by the halflife function A(t) = A0 (1/2)^t/29, where t represents the time, in years, after the initial time, and A0 represents … 
math
Suppose strontium90 decays at a rate of 2 percent per year. (a) Write the fraction P of strontium remaining, as function of t, measured in years. (Assume that at time t=0 there is 100 % remaining.) Answer: P(t)=(.98)^t (b) Estimate …