What is the scentific formula for Sodium Thiosulphate?
What is the mass of a 30 N rock in the school yard?
Sodium thiosulfate is Na2S2O3.
To determine the scientific formula for Sodium Thiosulphate, you can look it up in a chemistry reference book or search for it online. Sodium Thiosulphate has a chemical formula Na2S2O3, as you correctly mentioned.
Regarding the second part of your question, it seems you are asking about the mass of a rock in the school yard. In order to determine the mass of an object, you need a weighing scale or balance. Place the rock on the scale and read the measurement displayed, which will give you the mass. It's important to check the units of the scale to ensure the measurement is in kilograms (kg) or grams (g). If you are given the weight of the rock in newtons (N), you need to convert it to mass by using the formula: mass = weight / acceleration due to gravity (approximately 9.8 m/s^2).