1. Calculate the value of AH•/kJ for the following reaction using the listed thermochemical equations: P.O.le) + 6 PCI,(g) 10 CI,PO(g) 1/4 P.(s) + 3/2 Cl(8) →PCh(8) P.(s) + 5 0,(g) → P,O,o[g) PCI,(8) + Cl,(g) → PCI,(g) PCI,(8) + 1/2 O,(g) Cl,PO(g) AH•/kJ = -306.4 AHo/kJ = -2967.3 AHo/kJ = -84.2 AHo/kJ = -285.7

Consider the following operations on the number 8.83 x 10-². Without using a calculator, decide which would give a significantly smaller value than 8.83 x 10-2, which would give a significantly larger value, or which would give essentially the same value. 8.83 x 10-2 +3.23 x 105 (same 8.83 x 10-2-3.23 x 105 smaller 8.83 x 10 2 x 3.23 x 105 larger v 8.83 x 10-2/3.23 x 105 smaller

What is 302 x 4903

Calculate the electrostatic force of repulsion for two protons separated by 93.0 pm. The charge of a proton is q = 1.6 x 10-1⁹ C. Express your answer to two significant figures and include the appropriate units. Fel = μA 2.7.10 6 Submit N Previous Answers Request Answer ? X Incorrect; Try Again; 5 attempts remaining Use the equation Fel = K(Q₁ Q₂/d²) to find the electrostatic force between the two particles. Q₁ and Q2 are the charges on the particles (charge of a proton here), and d is the distance of separation. The constant is given in the introduction and has the units Nm²/C². This means that the distance must be converted from picometers to meters using the relation 1 pm = 1 × 10¯ m. -12

a) An acetaminophen suspension for infants contains 80 mg/ 0.80 mL suspension. The recommended dosage is 15 mg/kg body weight. How many mL of this suspension should be given to an infant weighing 6.5 kg? b) A runner wants to run 10.0 km. She knows that her running pace is 3.5 m s- 1. How many minutes must she run?

(7.211*10^5)*(5.3413*10^4)/4.09*10^-7

2. Lead metal can be extracted from a mineral called galena, which contains 86.6% lead by mass. A particular ore contains 68.5% galena by mass. A particular ore contains 68.5% galena by mass. If the lead can be extracted with 92.5% efficiency, what mass of ore is required to make a lead sphere with a 5.00 cm radius?

Every year Every second (1 year 365 days).

hboard My Home C OWLV2 | Online teaching and learning resource from Cengage Lear. [References] INTERACTIVE EXAMPLE Converting Units: Any Unit to Another Unit Gasoline at a gas station in Canada costs 1.13 Canadian dollars (CAD) per liter. If the exchange rate between US and Canadian dollars is 1 US dollar (USD) = 1.15 CAD, what is the cost of the gasoline in US dollars per gallon? 1 gallon = 3.78 L. USD/gal Show Tutor Stene

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