P Block - Group 17 Questions and Answers

A sample of an unknown sulfate compound has a mass of 0 100 g Addition of excess barium chloride solution to the sample forms a barium sulfate precipitate of mass 0 0676 g What is the mass of sulfate ion in the unknown sample

SSED THIS Watch IWE 4 15 Read Section 4 11 You can k on the Review link to access the section in your eText e elemental mass percent composition of salicylic acid 60 87 C 4 38 H and 34 75 O Part A Determine the empirical formula of salicylic acid Express your answer as a chemical formula xa A o Xb b b X A chemical reaction does not occur for this question If one of the subscripts is not a whole number multiply the all calculated subscripts by a small whole number to get whole num subscripts rather than rounding dit legt Try again

Which molecule below contains a central atom with an expanded octet N O AsCl5 BF3 PF3 SeCl

ENZY AND RE 19 48 What is the difference between the lock and key model of

For the redox reaction CIOsca Clan lain acid solution the number of electrons gained in the reduction reaction is a 1 b 2 c 5

Kredox for the reaction Br 212Br is given 2e 21 Br 2e2Br E 0 534V E 1 07 V a b c d 9 246 x 10 7 2 018 x 10 1 258 x 10 2 34 x 1054

A pure diatomic element is kept in a 225 mL container at 481 K and 3 670 mmHg If the mass of the sample is 1 952 grams what element is it

The illustration to the left represents a mixture of xenon brown and fluorine green molecules the molecules in the above illustration react to form XeF4 according to the equation e 2 F2 XeF4 the limiting reagent is the number of XeF4 molecules formed is the number of and atoms molecules in excess is

of the following describes the element F e all that apply belongs to a group consisting entirely of gases is one of the group of the least reactive elements forms a basic solution in water is very reactive as a metal consists of diatomic molecules in elemental form reacts vigorously with alkali metals to form salts

An example of a mixture is hydrogen fluoride purified water gold the air in this room all of these

When a sample of solid at 35°C (specific heat capacity = 0.89 J/g °C) is heated using 75.5J of energy, its temperature was raised to 48°C. What is the mass of this solid? Give your answer using the correct significant figure If the mass of a single bean is 0.03 g, how many beans are in a 2.5 lb sack of beans (1kg=1000g, 1kg= 2.2 lb) Give your answer using the correct significant figure

A. What is the electron-pair geometry for N in NOBr? There are ___ lone pair(s) around the central atom, so the molecular geometry (shape) of NOBr is ___ B. What is the electron-pair geometry for B in BF4-? There are ___ lone pair(s) around the central atom, so the molecular geometry (shape) of BF4- is ___

For the molecule AX3, in which all the atoms are in Periodic Group VIIA or 17 (the Halogens): 1. Draw the correct Lewis Structure. If others are possible but less likely, draw them too and explain why the correct one is the selection. 2. What are the electron pair and molecular geometries? a. Electron pair geometry: b. Molecular geometry: 3. What is the predicted (ideal) bond angle about the central atom? 4. Is the molecule polar or nonpolar? 5. What is the orbital hybridization on the central atom?

Create the Lewis structure of CF44 NOTE: do only the step asked for in each part and then click Check-don't work ahead to solve the final structure. Step 1. Count valence electrons in the molecule or ion. Do this by adding the periodic group numbers for each atom in the structure and adjusting for charge. Enter and Check. Step 2. Connect each pair of bonded atoms with a single bond by dragging bonds onto the molecule. Each bond decreases the number of available electrons by 2. Check.

Give the spectroscopic notation (also called spdf notation) electron configuration of F Enter the subshells in the order in which they are filled. For example, for oxygen, the answer would be: 1s22s22p4.

81. (77 in the 3rd edition) Hydrogen gas (a potential future fuel) can be formed by the reaction of methane with water according to the equation: CH4(g) + H₂O(g) -> CO(g) + 3 H₂(g) In a particular reaction, 25.5 L of methane gas (measured at a pressure of 732 torr and a temperature of 25 °C) mixes with 22.8 L of water vapor (measured at a pressure of 702 torr and a temperature of 125 °C). The reaction produces 26.2 L of hydrogen gas at STP. What is the percent yield of the reaction?

Chlorine has two stable isotopes, Cl-35 and Cl-37. If their exact masses are 34.9689 amu and 36.9695 amu, respectively, what is the natural abundance of Cl-35? (The atomic-mass of chlorine is 35.45 amu.) 37.00% 75.95% 24.05% 50.00% 35.00%

Draw the Lewis structure for ICI4-

In the reaction represented by the general equation: A + 2B 3C + 4D the initial concentration of B was 0.0431 mol/L. After 11.3 minutes, the concentration of B was 0.0307 mol/L. a) Calculate the average rate of consumption of B for the first 11.3 minutes in mol/(Ls). Put your answer in the first blank. b) Calculate the average rate of formation of C. Put your answer in the second blank.

A sample of an unknown sulfate compound has a mass of 0.100 g. Addition of excess barium chloride solution to the sample forms a barium sulfate precipitate of mass 0.0676 g. What is the mass % of sulfate ion in the unknown sample?

6.97 grams of ammonium carbonate reacts with 7.70 grams of barium arsenate. Predict the products, write the complete reaction equation, balance, and calculate the mass of the aqueous product.

At the end of the presentation about endangered wildlife, the participants were directed to a box in which they could give donations to the efforts. A) contribute B) imposition C) voluntary D) advocate E) interact F) finite G) mature

The team of oceanographers had to limit the scope of their research because there was a amount of funds available for the project. A) contribute B) voluntary C) mature D) imposition E) advocate F) finite G) interact

A 6.25 g sample of magnetite (Fe 30 4) contains 4.52 g of Fe. What are the percentages of iron and oxygen in magnetite? 28.6% Fe and 71.4% O 42.8% Fe and 57.2% O 72.3% Fe and 27.7% O 27.7% Fe and 72.3% O 57.2% Fe and 42.8% O

Based on formal charges, draw the most preferred Lewis structure for the chlorate ion, ClO3-