- How many hydrogen atoms are in 6.10 mol of ammonium sulfide?

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Metal and water? Determine o cosseno do ângulo da reta (r): X=(2,0,1) + t (-1,-2,-2) com a reta definida pelos pontos A(4,0,-1) e B(-2,-3,1).? Subtract 4 from both sides.? The density of a gas is 1.16 g/l at STP. What is the molar mass of this gas? Assume that the average person consumes 20 meals per week? (u=20) what is the most logical standard deviation?