Question

Solve (2−7)(4+5)

(1−5)(3+7)

= 1​

Answer 1

Step-by-step explanation:

Molar mass of = 1(S) + 2(O) = 1 (32) + 2 (16) = 32+32 = 64g. 1 mole of substance = Molar mass of the substance. Conclusion: 0.75 moles of have same mass as 3 moles of oxygen.

mark me as brainliest

Answer 2

Step-by-step explanation:

(-5)9

-5×9

-45

-4×10

-40