words problems that leads to simultaneous equations

The ores of lead are: (i) Galena, PbS (ii) Cerussite, PbCO 3 (iii) Anglesite, PbSO 4 . In India, small quantities of lead ores are found in Rajasthan. The chief ore of lead is galena. In order to extract lead from galena, the ore is first concentrated by frot..

Solving two equations simultaneously means to find the common solution of both the equations, i.e., a solution which satisfies both the equations. (Such a common solution, if it exists, can be shown to be unique..

Simultaneous Equations - A linear equations in two variables x and y is of the form ax + by + c = 0 ( ) where a, b, c are real numbers. To find a solution for this equation, we can assign any value for one of the variables and find the value of the other vari..

Consider a linear equations in two variables , say, 3x - 2y = 5. It has an infinite number of solutions, some of these are x = 0, Consider a linear equations in two variables , say, 3x - 2y = 5. It has an infinite number of solutions, some of these are x = 0, y = 0. Similarly, i..

1) - Graph the followin..

Lead and zinc are mainly located in Rajastan, Gujarat, Maharastra, West Bengal, Orisaa, Uttar Pradesh, Madhya Pradesh and Tamil Nadu. Total recoverable reserves of lead and zinc ores are 177 million tons, which can yield 23.80 lakh tons of lead and 9.7 million tons of..

Lead nitrate is prepared by dissolving lead, or its oxide or carbonate salt in dilute nitric acid. Lead nitrate is a colorless crystalline solid, soluble in water. It decrepitates when heated and decomposes as follows:..

This can be recharged by passing a current through it in the reverse direction. The chemical processes that occur at the electrodes during discharge are reversed by this. Thus the cell recovers its original state, except for some energy loss. Such cells are called secondary cells or accumulators. T..

Leading Strand - The enzyme forms one new strand in a continuous stretch in the 5'-3' direction and is called leading strand. On the other parent strand, the enzyme forms short stretches of DNA once again in the 5'-3' direction starting from an RNA primer. These short DNA fragme..

Lead tetrafluoride is an ionic so1id whereas Lead tetrachloride, PbCl 4 , is a covalent liquid. PbCl 4 is formed when PbO 2 is dissolved in concentrated HCl at 273 K. PbBr 4 and PbI 4 are unkno..