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A sample of strontium has a relative atomic mass of 87.7 and consists of three isotopes, 86Sr, 87Sr and 88Sr. In this sample, the ratio of abundances of the isotopes 86Sr: 87Sr is 1:1. Calculate the percentage abundance of the 88Sr isotope in this sample

Q. A sample of strontium has a relative atomic mass of 87.7 and consists of three isotopes, ⁸⁶Sr, ⁸⁷Sr and ⁸⁸Sr. In this sample, the ratio of abundances o...

Answered by Mohammed Burhan A. • Chemistry tutor

18873 Views

y = (x + 2)(x + 5)

steps as follows:x times x = x²2 times 5 = 102 times x = 2xx times 5 = 5xthen add these together:y = x²+ 7x +10x = -2, -5; y = 0, 10

Answered by Georgie L. • Maths tutor

2486 Views

Identify some features from Debussy's Claire de Lune that are associated with the Romantic era.

Use of dissonant and crushed harmonies.Varied rhythm and rubato.No clear melody line.

Answered by Georgie L. • Music tutor

4340 Views

Explain the differences between enzyme inhibitors

There are two types of inhibitors. Competitive inhibitors have a similar tertiary structure to the substrate and so can bind temporarily to the enzyme’s active site. This blocks the active site meaning th...

Answered by Laura N. • Biology tutor

2458 Views

A curve has the equation, 6x^2 +3xy−y^2 +6=0 and passes through the point A (-5, 10). Find the equation of the normal to the curve at A.

Use implicit differentiation on original equation-
12x + 3x(dy/dx) + 3y - 2y(dy/dx) = 0
dy/dx= -12x -3y/(3x-2y) at A, x= -5 and y= 10 therefore, dy/dx=-6/7

To find the normal of t...

Answered by Chantal G. • Maths tutor

6128 Views