_Na2S + _HCl -> NaCl + H2S which of the following coefficients would balance this equation?

a. 2, 1, 2, 1
b. 1, 2, 1, 2
c. 1, 2, 2, 1
d. 2, 1, 1, 2

Which of the following methods uses the decay of atomic particles in an object to find its exact age? a. fossil dating b. geologic dating c. radioactive dating d. relative dating

1) these are barrel shaped microtubules in most animal cells, that organize the spindles during cell division

24. a sports ball is inflated to an internal pressure of 1.85 atm at room temperature (25 °c). if the ball is then played with outside where the temperature is 7.5 °c, what will be the new pressure of the ball? assume the ball does not change in volume nor does any air leak from the ball a) 0.555 atm b) 1.74 atm c) 1.85 atm d) 1.97 atm