• Determine moles of HCL that react given the following:?

    Your Answer: 
    Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g) You are given 1.80 grams of Mg(s) ribbon and told to use 200.0 mL of 0.900 M HCl(aq). Determine the moles of HCl(aq) that react.
    3 mins ago
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  • Half Life Equation?

    Your Answer: 
    A group of scientists have discovered a box of elements placed in a safe environment by Marie Curie. These elements were found to be radioactive. These elements were discovered and placed in the safe environment in 1915 Dotium 500g(stored:weight) 333g(weight today) build a model for each element and predict how much will be left of the element in... show more
    5 mins ago
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  • What mass of potassium chloride forms when 5.11 L of chlorine gas at 0.943 atm and 286 K reacts with 29.0 g potassium?

    Your Answer: 
    The alkali metals react with the halogens to form ionic metal halides
    7 mins ago
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  • Calculate the percent by mass of sulfur in the ore?

    Your Answer: 
    Heating a 6.599 g sample of an ore containing a metal sulfide, in the presence of excess oxygen, produces 1.462 L of dry SO2, measured at 47.4 °C and 753.5 torr. . Assume that all sulfur in the sample was converted to SO2. S(s) + O2(g) → SO2(g)
    8 mins ago
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  • What is the difference between Ca and Ca2+?

    Your Answer: 
    34 mins ago
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  • I need help with thermochemistry! If someone could please show me how to do these problems. I will award a best answer as well. Thank you!?

    Your Answer: 
    A 0.550 gram chunk of sodium metal is cautiously dropped into 50.0 grams of water at 25 degree C in a vessel with an external pressure of 2 atm. a.) Has any work been done? If so what sign and magnitude of the work. b.) has there been an enthalpy change? If so what is the sign and magnitude of the enthalpy change is the reaction endothermic or... show more
    40 mins ago
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  • HELP WITH MIDTERM REVIEW?

    Your Answer: 
    A gas is heated by an electrical coil, and expands from 1.41 L to 2.10 L against an opposing pressure of 2.50 atm. What is w for the system in Joules? (1.00 L∙atm = 101.3J)
    42 mins ago
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  • Chemistry help please! thank you :)?

    Your Answer: 
    1 hour ago
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  • Calculate the mass in grams of 2.60 x 10^24 molecules of propylamine.?

    Your Answer: 
    The chemical formula for propylamine is C3H9N. I'm a bit stuck on this one. I used Avagadro's constant, but it says it's incorrect. I'd appreciate an explanation on how you got your answer, so I can see what I did wrong in my own process. Thank you!
    1 hour ago
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  • URGENT I HAVE A MIDTERM ON THIS TOMORROW MORNING.?

    Your Answer: 
    Find the concentration of iodide ions in a solution of 4.13g of BaI2 in 110. mL of water.
    2 hours ago
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