At what temperature (in degrees Celsius) will xenon atoms have the same average speed that Br_(2) molecules have at 17^circ C Express the temperature in degrees Celsius to two significant digits. T_(Xe)=square ^circ C

Show your work, using Hess's Law to solve for Delta H for the combustion of Magnesium. Mg(s)+1/2O_(2)(g)arrow MgO(s) square

Which statement describing atoms is FALSE? Multiple Choice The number of protons in an atom is referred to as the atomic number of the atom. The total number of protons, neutrons, and electrons in an atom is referred to as the mass number of the atom. Protons and neutrons are located in the nucleus of an atom. Electrons are located in the space outside the nucleus called the electron cloud. The number of protons is equal to the number of electrons.

Consider the following equation. P_(4)(s)+F_(2)(g)arrow PF_(3)(g) Calculate the moles of F_(2) that will be required to produce 27.5 grams of PF_(3)

Aluminum is a reactive metal. It reacts with oxygen to form aluminum oxide as shown below. 4Al(s)+3O_(2)(g)arrow 2Al_(2)O_(3)(s) I. When one mole of aluminum reacts with excess oxygen how many moles of aluminum oxide will be produced? II. When one mole of oxygen reacts with excess aluminum how many moles of aluminum oxide will be produced? III. When one mole of aluminum reacts with one mole of oxygen how many moles of aluminum oxide will be produced?

In the reaction 2Ag^++Cuarrow Cu^2++2Ag which half-reaction represents oxidation? A) Ag^++e^-arrow Ag B) Cuarrow Cu^2++2e^- C) Cu^2++2e^-arrow Cu D) Agarrow Ag^++e^- A B C D

How much methanol (CH_(3)OH, in grams) can be formed from 43.2 g of hydrogen? Assume excess CO. CO(g)+2H_(2)(g)arrow CH_(3)OH(g) square gCH_(3)OH

True or false Elements on the left side of a period are metals because of the tendency to want to gain electrons. (Do not consider hydrogen.) True False

Chemical services should not be performed on hair that has been colored with any of the following products EXCEPT Select one a. henna b. metallic dyes c. compound dyes d. weekly rinses

2A reaction with ammonium sulfate. molecular equation complete ionic equation net ionic equation

Hot Questions

How many protons does an element have if it has an atomic number of 12? $\square 6$ 12 25

How many moles are there in 3.50 g of ethanol, $CH_{3}CH_{2}OH$ 161 mol 0.00621 mol 13.1 mol 0.0761 mol

The addition of an acid to water increases the $[H_{3}O^{+}]$ of the solution and increases the solution pH. True or False True False

A graduated cylinder is filled with water to the 25.0 mL mark. After 27.5 g of titanium dioxide $(TiO_{2})$ is added, the volume is 31.5 mL. Calculate the density of the $TiO_{2}$ to the correct number of significant figures. $0.873g/cm^{3}$ $0.87g/cm^{3}$ $4.2g/cm^{3}$ $4.23g/cm^{3}$ $3.1g/cm^{3}$

Chice's teacher gives her and her lab partner soil samples from different parts of the city:the park, the area next to a pond, the school, and a neighborhood. Chloe's teacher also gives her a soil tester kit, which determines the pH of the soil. Chloe and her lab partner need to determine the pH of each soil sample and then compare them. Fill in the blank with the word that best completes the statement. This investigation is a(an) $\square $ investigation.

Which one of the following is most soluble in hexane $(C_{6}H_{14})$ $CH_{3}CH_{2}OH$ $CH_{3}CH_{2}CH_{2}CH_{2}CH_{2}OH$ $CH_{3}CH_{2}CH_{2}CH_{2}OH$ $CH_{3}CH_{2}CH_{2}OH$ $CH_{3}OH$

How many mmHg are in 1.6320 atm? 12.241 mmHg 165.36 mmHg 465.69 mmHg 1.240.3 mmHg

What is the maximum number of moles of glycine $(C_{2}H_{5}NO_{2})$ that could be made in the flask if no other molecules were made? 1 mole of glycine 2 moles of glycine 5 moles of glycine 120 moles of glycine

What is the conjugate base of the hydronium ion. $H_{3}O^{+}$ i Multiple Choice $OH^{-}$ $H_{2}O^{-}$ $H_{2}O$ $H_{3}O^{+}$ has no conjugate base.

The chemical formula for chlorous acid is __ $HClO_{3}(aq)$ $HClO_{6}(aq)$ $HClO(aq)$ $HClO_{2}(aq)$