A)A beaker containing 50 cm3 of 0.2 mole/dm3 sodium thiosulfate was placed on the top of a black cross. Then 5 cm3 of 2 moles/dm3 hydrochloric acid was added. And the clock started which(Na2S2O3 or HCl) is limiting reagent? The chemical equation for the reaction is given below. (3)
Na2S2O3 + 2 HCl --> 2NaCl + SO2 + S + H2O
b) Write about solid, liquid and gas using property movement of particles

(04.05 hc) analyze the given diagram of the carbon cycle below. an image of carbon cycle is shown. the sun, a cloud, two trees, one on the left and the other on the right, an animal, lake, and a factory are shown in the image. an arrow is shown from the sun towards the left tree marked a. the sun is marked b. there is an arrow from the air above the clouds, marked c, towards the left tree. an arrow from a location close to the ground marked d points towards dead organisms, which is a label under the animal. an arrow marked e points from the right tree straight up to the clouds. an arrow marked f points from the animal straight up to the clouds. an arrow marked g points from the factory towards the air above the clouds, c. there is an arrow pointing from the air to the lake labeled carbonates in water, an arrow pointing down from dead organisms to fossils and fossil fuels, and an arrow from fossils to the factory. part 1: which compound does c represent? part 2: name a process that could release this compound into the air. part 3: explain how the elements that form it are conserved during the carbon cycle. use complete sentences to explain your answer.