The independent variables, the ones that are intentionally manipulated, are a. temperature, acidity, surface area, and percentage of mass remaining. b. temperature, acidity, mineral composition and surface area c. acidity, mineral composition, percentage of mass remaining and temperature d. acidity, mineral composition, temperature, and percentage of mass remaining. 15 points! i have until 4: 00 pm

Iknow #2 is d. i just need to know why

Find the mass in grams of 1.37x1020 particles of h3po4

Plz me ! 1 which of earths spheres contains most of its mass? a atmosphere b hydrosphere c geosphere* d biosphere 2 erosion and weathering are examples of which types of forces? a constructive forces b destructive forces* c gravitational forces d inertia-related forces 3 which of the following statements about earths atmosphere is true? a earths atmosphere contains 78% water vapor which is essentail to life b earths atmosphere contains 21% oxygen c earths atmosphere contains carbon dioxide which all life forms require d earths atmosphere allows radiation from the sun to pass through it and warm earths surface* 4 the strenght of the force of gravity between two objects is determined by which of the following factors? select all that apply a the messes of the objects* b the distance between the objects* c the volumes of the objects d the surface area of the objects 5 earth and moon are kept in there respective orbits due to the influence of a inertia b gravity c gravity and inertia* d neither gravity or inertia if you answer all questions right i will give