# Posts by Haile

Total # Posts: 14

**chemistry**

the concetration of HCl in a commercial concetrated HCl solution is given as 37%(W/W). calculate the molarity

**che**

the concetration of HCl in a commercial concetrated HCl solution is given as 37%(W/W). calculate the molarity., normality of HCl in the solution . prepare 100.ml of 1N solution of HCl

**maths**

solve 2cos(2theta-pi)= -2 , -2 pi less or equal to theta less than 2 pi

**math**

solve for theta:2cos(2theta-pi)= -2 ,for -2pi less or equal to theta less than 2pi

**social studiesw**

how can objects we find today tell us about people who lived before written history

**Physics**

nfttttttfg

**Physics**

Two men pushing a stalled car generate a net force of +655 N for 8.3 s. What is the final momentum of the car?

**Chemistry**

Write the correct symbol in standard form for the isotope of platinum that contains 118 neutrons.

**Chemistry**

Write the correct symbol in standard form for the isotope of platinum that contains 118 neutrons.

**Math**

Express the repeating decimal 0.513 (the 13 is repeating so the decimal is 0.5131313131313...) as a fraction in lowest terms using the infinite geometric series method.

**Math**

the 1 and the there are repeating so it's .513131313131313... and 489/900 isn't giving me that. could you explain it again?

**Math**

Express the repeating decimal 0.513 (the 13 is repeating) as a fraction in lowest terms using the infinite geometric series method.

**chemistry**

if there are 8.0 mg of Na+ contaminant per liter of water sample, calculate the number of moles of Na+ per liter. Calculate the weight of Na+ in a 1L sample of water that contains 1.00 x 10^2 umol Na+/L

**D M U**

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