- How many moles are in 6.2E24 atoms of Ca?

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I have a roads that s 6,718 ft long and 20 pavement marks every 15 how many marks do I have? show work thank you!? I thought there was no difference in races. Yet black people cant wash their hair everyday, their skin is different and sickle cell? What is the average (arithmetic mean) of x^2+2x-3, 3x^2-2x-3 ,and 30-4x^2? If a point P (–2, 1) is reflected across the line x = –1, what are the coordinates of its reflection image? What is 2/3 of 7.0?