Chemistry

A gas at 49.3^circ C and 893 mm Hg experiences a temperature change and ends up with a pressure of 778 mm Hg. What is the new temperature of the gas in degrees Celsius? T=[?]^circ C

A reaction that can proceed in either the forward or the reverse direction as written is called a __ reaction. A) favored B) microscopic C) solid phase D) reversible E) miniscule

An acid and base react to form a salt and water in a(n) __ reaction. A) reduction B) ionization C) neutralization D) dissociation E) oxidation

Which of the following will decrease the solubility of a gas in water? Choose all that apply. decreasing the temperature increasing the temperature decreasing the pressure increasing the pressure

A balanced chemical equation indicates both the number of particles of reactants and products and the number of: orbits electrons nuclei moles

Oil does not dissolve in water because A) oil is polar. B) oil is hydrated. C) water is nonpolar. D) oil is nonpolar. E) water is saturated.

3. A 175 g piece of iron and a 175 g piece of aluminum are placed in a hot water bath so that they are warmed to 99.7^circ C The metal samples are removed and cooled to 21.5^circ C . Which sample undergoes the greater heat change? (Al;-12.3kJFe;-6.08kJ)

A student is using these conversion factors to convert from 5.0 moles of the given reactant to the moles of the other reactant.Identify any conversion factors that would NOT work. Tap to select or deselect an answer. Select all that would NOT work. 3Ti+2N_(2)arrow Ti_(3)N_(4) 5.0molTitimes (2molN_(2))/(3molTi) 2Sb+3H_(2)Oarrow Sb_(2)O_(3)+3H_(2) 3molH_(2)Otimes (2molSb)/(5.0molH_(2)O) 4P+5O_(2)arrow P_(4)O_(10) 4molPtimes (5molO_(2))/(5.0molP)

Guiding Questions mais of the original 1000.0 hg shipment was actually water? What to the carrect chemical formula of the chemical that the buyer recelved? Background look compounds that contain water molecules as integral components of their crystals are called hydrates. The name for an lonic hydrate is derived by adding a I term to the name for the antrydruce (meaning)"not hydrated") compound that Indicates the number of water molecules associated with each formula unit of the compound. The added world begins with a Greek prefis denoting the number of water molecules and ends with "hydrare." For example, washing soda It the common name for a hydrate of sodium carbonate containing 10 water molecules.the systematic name is sodium carbonate decahydrate Formulas for ionic hydrates are written by appending a vertically centered dot,a coefficient representing the number of water molecules, and the formula for water. The example mentioned in the previous paragraph is represented by the formulat Na_(2)CO_(1)cdot 10H_(2)O A shipment of anhydrous copper (II) sulfate was ordered and recelved in a crate. The buyer nodeed that the unhydrous copper (II)wulfate, which should have been whire in color, was now blue in color.This means that the compound contains water and is some type of hydrate of copper (II) sulfate. Hydrates are compounds that have a specific number of water molecules incorporated Into thelf crystal structure due to the significant polarity of water. The supplier contends that the shipment is the expensive anhydrous copper (II) xulfate and just absorbed a little moisture, giving the chemical a blue appearance. However, the buyer believes that the supplier purposefully mixed up the shipment with a common inexpensive hydrate of copper (II)sulfate that is commercially available. The buyer states that this can be demonstrated with a little chemistry and wants to determine the exact ratio of water to copper (II) sulfate that exists in this shipment. The buyer had received 1000.0 kg of this compound In order to refine It and extract the pure copper. Chemical testing must be conducted to properly identify the shipment square .

If the temperature of a liquid-vapor system at equilibrium is reduced, the percentage of liquid in the system will decrease. equilibrium is unaffected. concentration of the vapor will decrease. rate of evaporation will increase.