Presumably, the first Abacus appeared in ancient Babylon about 3 thousand years BC. Abacus was a grooved board with movable counting labels (stones or bones). The ancestor of the modern calculator is Abacus, which means "board" in Latin. Mera Calculator Polyatomic Ion - Simple yet effective, this calculator allows you to input the positive and negative ions from an empirical formula and it then spits out the molecule's name. You can see the current math calculations in a smaller display that is below the main display of the calculator.Ĭalculations order for this given example is the following: 2+2=4, subtotal - 4. Why do we get 8 when trying to calculate 2+2x2 with a calculator?Ĭalculator performs mathematical operations in accordance with the order they are entered. įrequently asked questions about the calculator To enter (divide) - key on the numeric keypad on the right or a combination of keys and.
To enter (multiplication) - key on the numeric keypad on the right or a combination of keys and. To enter - key at the top or key on the right. To enter - key at the top or key on the numeric keypad on the right. Compute NPV, IIR, break-even calculations, interest conversions, delta percent, profit and loss, cost, selling price, margin and markup. To erase the last character - (arrow keys). Easy-to-use Financial Calculator solves time-value-of-money calculations such as annuities, mortgages, leases, savings, and more.
#Best chemistry calculator online free#
To use free online calculator you can use both ordinary numeric buttons at the top of a keyboard and numeric buttons on the right of a keyboard. The result is equal to 625.ĭeduction percentage of the number: 500 25. These are apps to help students with learning chemistry from understanding the elements, molecules and atoms to solving chemical equations, formulas and. The result is equal to 5(%).Īdding percentage to the number: 500 25. The result is equal to 125.Ĭalculating what percent is one number of another number: 25 500. The result is equal to 81.Ĭalculation of percentage of the number of: 500 25. resets the calculator without resetting the memory.Įxamples of calculations on the online calculatorĬalculate the square root of 529: 529. reset the calculator and reset the memory addition, - subtraction, - multiplication, - division remove the last character on the display Instructions for using the online calculator Keys function Detailed instructions for using the calculator, see below. You can make not only simple math calculations and calculation of interest on the loan and bank lending rates, the calculation of the cost of works and utilities.Ĭommands for the online calculator you can enter not only the mouse, but with a digital computer keyboard. Use for work, school or personal calculations. As such, no matter your calculation needs, you should be able to find one that's right for you.įor more great back-to-school supplies, check out our picks for the best graphing calculators, laptop backpacks, and smart notebooks.Large, easy and convenient online calculator We also made sure that the models we chose were well-regarded by customers, and all of the models you'll find below have average customer ratings of at least four out of five stars or higher.
#Best chemistry calculator online professional#
We also kept different coursework requirements, professional duties, and price points in mind, ensuring that our selections would be useful to the widest range of customers possible. We read through a wide breadth of professional reviews to find consensus on the best calculators in a number of different categories. Whatever type you choose, make sure you can rely on the model you've selected to stay charged for long stretches of time. Calculators can be battery-powered, solar-powered, or a hybrid of both. This calculator is an approximation for calculating the hydrogen peroxide in a condensed. This calculator is for calculating the pH of a solution of poly-acrylic acid. Speaking of college entrance exams, nothing could be worse than having your calculator run out of power on you before you finish. This calculator is used to calculate the pH obtained when dilutions a strong acids such as sulphuric acid, nitric acid, hydrochloric acid etc in an aqueous buffered solution. Additionally, if you plan to use it for college entrance exams, make sure the model you are going to purchase is approved for use during testing. Be sure to choose one that will serve your particular needs. Capabilitiesįrom graphing to scientific to more basic models, there are different types of calculators with different capabilities. While calculators have all sorts of bells and whistles these days, there are really only two things (aside from price) with which you need to be concerned when shopping for one.
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