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Two different substances at different temperatures are allowed to come in contact and thermally equilibrate. The mass of the first substance "A" is 31.00 g and its inital temperature is 21.4 degree cellsius. Substance "A" is allowed to come into contact with substance "B". Substance "B" has a mass of 46.28 g and its inital temperature is 86.5 degrees celsius. These two substances reach thermal equilibrium at a temperature of 64.2 degree celsius. If the specific heat capacity of substance "B" is 1.17 J / g-C, what is the specific heat of substance "A". (assume no heat is lost to the surroundings)
Ethane C2H6 burns in oxygen a.) what are the products of reaction b.)write the balanced equation for the reaction
A 2.01 g sample of a salt dissolves in 9.10 g of water to give a saturated solution at 25°C. What is the solubility (in g salt/100 g of H2O) of the salt?
Water dissolves table salt (NaCl) because: A. NaCl is hydrophobic. B. NaCl has a polar covalent bond. C. water molecules surround the Na and Cl ions due to electric attraction.
Is it possible for an atom to absorb a photon of red light and reemit a photon of violet light
what is the flow of the gulf stream in milliters per minute (b) what mass of water in the gulf stream flows past a given point in 24 hours? the density of seawater is 1.025 g/ml
choose from among the following: disulfide bond, salt bridge, hydrogen bonding or dispersion forces. A) glutamic acid and lysine B) tyrosine and lysine C) Ile and Ala D) two cysteines
Which of the following compounds will produce an acidic solution when dissolved in water? What is the OH- (hydroxide ion) concentration in a solution with pOH = 2.45.
What was the composition of the mixture of Mg and Zn expressed as percent by mass? If the volume of acid used was 100 mL, what were the final molar concentrations of MgSO4 and ZnSO4?
Predicting the Polarizability of a Molecule. Consider the following set of data for polarizability. From what I have learned, the simplest model for predicting the polarizability of a molecule is to assume that polarizability scales with the type.
Assume that the H2O2 solution has a density of 1.0g/cm3. What would the mass of 35cm3 of the H2O2 solution be?
AgBr is the light-sensitive compound in most photographic films. Assume, when film is exposed, that the light energy absorbed dissociates the molecule into atoms.
A green leaf has surface area 2.05 cm^2. If solar radiation is 1190 W/(m^2) , how many photons strike the leaf every second? Assume three significant figures and an average wavelength of 504 nm for solar radiation.
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