200mL of 400M ammonium sulfide would require how many mL of 300M gallium nitrite to react completely?

Explanation for basic character?

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.

Pastoral farming is best described as a. a method of raising livestock and moving herds b. an african method of agriculture c. a method of cultivating crops on poor soils d. a common method of desert farming select the best answer from the choices provided a b c d