The main goal of developing technology is a) learn about the universe and the laws of nature. b) design new scientific instruments. c) make new inventions and processes to benefit humans. d) make new scientific discoveries.

Explain which group an element with the electron configuration 1s2 2s2 2p6 3s2 3p6 3d1 4s2 belongs to.

The reactions shown here can be combined to make the overall reaction c(s) + h2o(g) ⇌ co(g) + h2(g) by reversing some and/or dividing all the coefficients by a number. a. c(s) + o2(g) → co2(g) k=1.363×10^69 b. 2 h2(g) + o2(g) → 2 h2o(g) k=1.389×10^80 c. 2co(g) + o2 (g) → 2 co2(g) k=1.477×10^90

How much heat is added if 0.814g of water increase in temperature by 0.351 degree c?