Chemistry, 06.12.2019 06:31 newjersey4015
A12.0 g sample of a metal is heated to 90.0 ◦c. it is then dropped into 25.0 g of water. the temperature of the water rises from 22.5 to 25.0 ◦c. the specific heat of water is 4.18 jg−1◦c −1 . calculated the specific heat of the metal. express your answer in jg−1◦c
i know that the answer is 0.335. my question: should there be 2 sig figs (0.34) because 25-22.5=2.5? or is it three sig figs 0.335 because all the original values have 3 sig figs in the beginning.
Answers: 1
Chemistry, 22.06.2019 06:00
There are 6.022, 104 atoms of hg in 1 mole of hg the number of atoms in 45 moles of hg can be found by multiplying 4.5 by 6.022, 102 which is the number of atoms in 4.5 moles of hg, correctly written in scientific notation with the correct number of significant figures? 0 21,109 0 21,100 271, 1024 27.099, 100 mark this and retum save and exit submit
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Chemistry, 22.06.2019 19:00
Imagine that a new planet is discovered with two moons of equal mass: moon a and moon b. the mass of the new planet is greater than the combined mass of its moons. moon a is farther away from the new planet than moon b. what is the planet's gravitational pull on moon a compared to the planet's gravitational pull on moon b? the planet's gravity repels moon a with a greater force than it repels moon b, which is why moon a is farther away. the gravitational pull on moon b is greater than on moon a because moon b is closer to the new planet than moon a. the gravitational pull on moon b is greater than on moon a because moon b is farther away from the new planet than moon a. the gravitational pull on moon a is the same as the gravitational pull on moon b because distance does not affect the planet's gravity.
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A12.0 g sample of a metal is heated to 90.0 ◦c. it is then dropped into 25.0 g of water. the tempera...
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