What mass of water amount of energy raise to boiling point
When metabolized, an orange provides 445 kJ of energy. What mass of water could this amount of energy raise from 25.0 degrees calcius to the boiling point?
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A 27.0 g sample of an unknown carbon-hydrogen compound was burned in excess oxygen to form 88.0 g of CO2. What is a possible molecular formula of the hydrocarbon?
Calculate the pH of the final solution. A solution is made by dissolving 25.6 g of NaOH in approximately 450 mL of water in a volumetric flask. The solution becomes quite warm, but after it is allowed to return to room temperature, water is added
What do you understand by the term durability? Compared to other considerations, how much importance should be given to durability in the design and construction of concrete structures?
1. How could you separate barium sulfate, BaSO4, from (NH4)2CO3? 2. How could you separate zinc chloride, ZnCl2, from zinc sulfide,ZnS?
When 2.45 g of an unknown weak acid (HA) with a molar mass of 85.0 g/mol is dissolved in 250.0 g of water, the freezing point of the resulting solution is -0.255 C. Calculate Ka for the unknown weak acid.
A rectangular beam made using concrete with f'c = 6000 psi and steel with fy=60000 psi has a width b= 20 in. The concrete modulus of rupture fr=530 psi.
Calculate the concentration of bicarbonate ion, HCO3 -, in a 0.010 M H2CO3 solution that has the stepwise dissociation constants Ka1 = 4.3 × 10-7 and Ka2 = 5.6 × 10-11.
When balancing the equation using half reactions why is the half reaction of the reduction of the chromate ion written Cr2O7---->Cr3+ instead of Cr2O7---->Cr2O4 How would I write the final balanced equation including the spectator ions?
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A 22-year-old woman is seen in the emergency department (ED) with a 1-day history of lower abdominal pain and vaginal spotting.
Question: Which of the following is true regarding newborn's perceptions of color?
Martin is a 45-year-old mail carrier who lives with his wife. Martin is the sole breadwinner of the family and works five days a week for eight hours each day
Question: Why are small children at greater risk for iron toxicity? a. They are smaller in size. b. They are more likely to think iron pills are candy.
A client with tuberculosis is on respiratory precautions. The charge nurse notes that several people have entered the room without appropriate
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Important biological and behavioral differences between males and females that is crucial to providing adequate care by physicians.