grade k science

SI unit of energy is Joule. Commercial unit of energy is kWh. 1 kWh = 1 kW x 1 h = 1000 W x 3600 s 1 watt - second = 1 joule 1 kWh = 3600000..

The SI unit joule is too small to express very large quantities of energy. Hence we use a bigger unit called kilowatt hour (kWh) to express energy. 1 kWh is the amount of energy consumed by an electrical gadget in one hour at the rate of 1000 J/s or 1kW. The energy use..

Some Important Carbon Compounds - Ethanoic Acid - Acetic acid is one of the commonest organic acids and has been known for quite a long time in the form of vinegar. It is also present free in a number of fruit juices. In the combined state it occurs in many oils and essential oils. Formula: CH 3 CO..

The SI unit joule is too small to express very large quantities of energy. Hence we use a bigger unit called kilowatt hour (kWh) to express energ..

In certain pairs of elements like, Ar (40) and K (39); Co (58.9) and Ni (58.6); Te (127.6) and I (126.9) the arrangement was not justified. For example, argon was placed before potassium whereas its atomic mass is more than potassiu..

Question: Which of the following is not a mixed salt? 1. K.Ca.PO 4 2. Ca(OCl)Cl 3. Na.K.CO 3 4. KCl Answer: ..

Commercial Unit of Electrical Energy - The unit 'watt' is very small. Therefore, in actual practice we use a much larger unit called 'kilowatt'. It is equal to 1000 watts. Since electrical energy is the product of power and time, watt hour (W h) can also be considered as unit of electric energy. On..

Question: On what basis is Potassium (z = 19) placed in 4 th period and 1 st group? Answer: The electronic configuration of potassium is 2, 8, 8, 1. It has four shells so it belongs to the 4 th period. The 4 th period has elements with the 4 th shell being filled. K has 1 ..

Potassium dichromate = K 2 Cr 2 O 7 GMM = (2 x 39) + (2 x 52) + (7 x 16)= 78 + 104 + 112 g = 294..