Which of the following is a true statement?
A.
If one mole of 39K has a mass of 39.1 grams, the mass of one atom of 39K is 39.1x1025 grams
B. If one atom of 12C has a mass of 12.0 amu, one mole of 12C atoms has a mass of 12 x 6.02 x 1023 grams.
C. If one atom of 223Fr has a mass of 223.0 amu, one mole of 223Fr has a mass of 223.0x 1023 amu.
D.
If one atom of 1271 has a mass of 126.9 amu, one mole of 1271 has a mass of 126.9 grams

50 pts plz what is the physical state of matter of baking soda.

Darla claims that the first periodic table developed by mendeleev was not completely accurate, so it is not useful at all. harmony argues that it establish the periodic table we use today, making it more credible. who is correct and why? darla is correct, because a model that has any mistakes should be thrown out. darla is correct, because a good model would not need to change. harmony is correct, because mendeleev’s model had all of the information correct in the first version. harmony is correct, because mendeleev’s model made predictions that came true.

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