If 77.32 grams of S are used, how many moles of Al are used? Equation: 2 Al + 3 S -> Al2S3

2.2°  

step-by-step explanation:

let θ = the angle of elevation.

tanθ =77/2020

tanθ = 0.038 12

      θ = tan⁻¹0.038 12

      θ = 2.2°

x = -4

step-by-step explanation:

- 20 - 4(x + 3) = 4x

=> -20 - 4x - 12 = 4x

=> - 32 -4x = 4x

=> -32 = 4x + 4x

=> - 32 = 8x

=> -32/8 = x

=> -4 = x

80x^8−68x^6+16^5−20x^4−4x^3+8x^2

hope i'm right lol