MQ_San Andreas

(Q27) The hydrogen gas evolved in a reaction between solid zinc and hydrochloric acid has been collected over water. The volume of water displaced is equal to 0.684 L. Given that the gas was collected at a temperature of 30.0°C and the atmospheric pressure was 736 torr, what mass (in mg) of hydrogen gas was collected? (3 sf)

If the BOD of a municipal wastewater at the end of 7 days is 60 mg/liter and the ultimate BOD is 85 mg/liter, then the rate constant is per day. (3 points) Select one: O a. 0.01748 O b. 0.1487 374 d 0.1748

(Q28) How many grams of phosphine (PH3) gas can form when an excess of solid phosphorus (P4) reacts in a sealed chamber with 56.2 liters of hydrogen (H2) gas at STP? (3 sf)

(5) question is in the photo below

Consider this information about two greenhouse gases, CH4 and N2O. Which statement is correct for CH4? (10) Greenhouse Gas Abundance in Troposphere, % Factor N20 160 3.1 x 10-5 CH4 30 1.8 x 104 CH4 is less effective greenhouse gas and there is less of it in troposphere. )) CH4 is less effective greenhouse gas and there is more of it in troposphere. )) CH4 is less effective green house gas and there is less of it in troposphere. ) CH4 is more effective green house gas and there is more of it in troposphere.

(9). Subject  :- Chemistry

O Dashboard O Dashboard 101 Chem101 x G The largest g The World's G The Great St * [Solved] Che Get Homewo O The Cullinan How do You O Lab Program My Question + O 8 https://app.101edu.co Question 16 of 20 Submit Lake Baikal in Siberia is the largest freshwater body on Earth by volume, at 5666 mi What is this volume in L ? (5280) (12) (2.54) 1 L 5666 X X STARTING AMOUNT 1 1 1 1 (5280) ft3 (12)° in3 (2.54) cm3 1 mL 1L 5666 mi3 x = 2.362 x 1019 L 1 mi3 1 ft3 1 in3 1 cm3 1 mL ADD FACTOR DELETE ANSWER RESET *( ) げ 2.362 x 1022 2.54 0.01 (1)s (2.54) 1 0.001 2.362 x 1016 2.362 x 1019 (5666)3 12 1000 5666 7.909 x 10° 100 (12)* 5280 8.795 x 1013 (5280) cm3 cm ft° in mL mi mi ft ml3 L in 11:18 PM P Type here to search 65°F AQI 82 9/3/2021 近

Eneble Editing Activate 2.2 Which substance(s) is/are liquid(s) at 400 C? 2.3 Which substance does not have a liquid phase? 2 Study the following list of melting and boiling points of various substances: (5) 2.4 What is the process called when a solid tums directly into a gas? Substance Melting point ("C) Boiling point () Neon (Ne) -249 -246 Oxygen (02) -219 -183 2.5 In which state would sulphur exist at a temperature of 25 °C? Carbon dioxide (CO2) -57 -57 Butane (CaH10o) -138 Hydrogen fluoride (HF) -83 20 Sulphur (S) 114 440 Which of the substance(s) is/are gas(es) at room temperature (25%C)? nere to search MECED

The combustion of gasoline (octane) in a car engine can be represented by the following equation: 2C3H18(1) + 2502(g) --> 16CO2(g) +18H2O(g) a. What mass of oxygen is used up to burn a full tank of 36.00 kg of gasoline? b. Why might a vehicle that is calibrated to run perfectly at sea level run poorly at higher elevations? C. According to the Canadian Automobile Association, the average Canadian drives 20,000 km/yr. Assuming that distance, how many more kg of carbon dioxide are added to the atmosphere each year by a Toyota Tacoma (fuel economy of 12.8 L/100 km) than a Toyota Prius (4.52 L/100 km)? The density of gasoline is 0.719 kg/L.

(58) A Ch - A fun A Ch A Lab 6 Ix G Whi G Whi G An G Mas G is Br G Part Ch 2 G acc G pen + Thir Map Goo G iron O File /home/chronos/u-89894221a1237b56532567cf04377caaald4971d/MyFiles/Downloads/Observation%20protocol.pdf Part II. Observing Physical and Chemical Changes A. In this section, a sample will be examined to see how it interacts with fire, in other words, whether this sample is flammable or not. Being flammable is a chemical property. You will also be checking to see how this sample responds to heat. Based on the observations, decide whether a physical and/or a chemical change has taken place. Obtain one piece of aluminum foil and place it on a wire gauze on the ring clamp. Carry out steps 1-5 in the order. Record your observations in the table. Allow the foil to cool before beginning the next procedure. Recycle the aluminum. 1. a) Place two drops of water on the foil. Bring a lit wood splint near (but not touching) the surface of the water sample to see if it catches fire or…

8:45 Convert 7.6 cm³ to m³ STARTING AMOUNT ADD FACTOR x( ) (1000) ³ 0.01 (0.1) ³ (0.01) ³ 0.076 (1) ³ 0.1 1 100 1000 Question 29 of 40 (100) ³ 7.6 x 10-4 7.6 7.6 x 10-6 X ANSWER m³ cm³ m cm Tap here or pull up for additional resources ..lLTE Submit RESET 5

3SnCl4 + 4Al(C2H5)3  ----> 3Sn(C2H5)4 + 4AlCl3   A) In one experiment, 0.300 L of SnCl4 (d = 2.226 g/mL) was treated with 0.579 L of triethylaluminum (Al(C2H5)3); d = 0.835 g/mL). What is the theoretical yield in this experiment (mass of tetraethylstannane, Sn(C2H5)4)? B) If 0.352 L of tetraethylstannane (d = 1.187 g/mL) were actually isolated in this experiment, what was the percent yield?

5. 6. - ڈھ همره سم ۰x۰ +

This is possible because of the following reactions that take place rapidly as long as reactants are available:  (11.3)   Equation : 51-(aq) + IO-3(aq) + 6H+(aq) ----> 3I2(aq) +3H2O(I)

12:49 1 Send a chat Paragraph Styles Edit I 1 2 . 3 4 L..5 . 6.. I 7.. Problems from Periods 18-19: 1. Gasoline combustion engines run on the following balanced chemical reaction between octane (CH) and oxygen (0.): 20,H1 (g) + 250, (g) 16CO, (g) 18H,0 (g) A small car's gas tank holds 34292 grams (75.6 |bs) of gasoline. a. How many grams of the greenhouse gas CO, are produced by one tank of gasoline? Convert that number to pounds (Ibs). b. How many grams of O, are necessary to completely react with one tank of gasoline? CPacus

LTE+ 74% 5:38 PM KB/s 200406_Homework..mdahl_Chapter 04 - Saved Homework (Chapter 4) 2019. 4. 6 Example 4.1 Calculate the molarity of a solution preparcd by dissolving 11.5 g of solid NaOH in enough water to make 1.50 L of solution Example 4.2 Calculate the molarity of a solution prepared by dissolving 1.56g of gascous HCl in enough water make 26.8 mL of solution. Ехample 4.3 Give the concentration of each type of ion in the following solutions: (a) 0.50 M Co(NO:) (b) 1 M Fe(ClO4)3 Example 4.4 Calculate the number of moles of Cl ions in 1.75 L of 1.0 x 10-3 M ZnCl,. Ехample 4.5 Typical blood serum is about 0.14 M NaCl, What volume of blood contains 1.0 mg NaCl? Example 4.6 To analyze the alcohol content of certain wine, a chemist needs 1.00 L of an aqueous 0.200 MK CrO (potassium dichromate) solution. How much solid K CrO, must be weighed out to make this solution? Ехample 4.7 What volume of 16 M sulfuric acid must be used prepare 1.5 L of a 0.10 M H,SO, solution? Ехample 4.8 Using the…

8:53 Question 28 of 40 2 5 8 One of the fastest pitches ever thrown in Major League Baseball was by Aroldis Chapman and had a velocity of 105.1 miles/hour. How many seconds did it take this pitch to travel the 60 feet and 6 inches from the pitcher's mound to home plate? (1 mile = 5280 feet) 1 4 7 +/- Tap here or pull up for additional resources S 3 6 9 O ..lLTE Submit XU x 100

00 3. 2. FI Question 18 of 20 Write a balanced chemical equation based on the following description: sulfur dioxide gas and oxygen gas react to produce sulfur trioxide gas 2+ 6 7 8 口666666( 4. 5. 6. O O O O O OO (g) (aq) (1) SD Sr Reset •x H2O Delete e to search a 81°F EX |画 144 9) 6. R.

Time left 1:58:0 22) Worksheet Question ID: W-3010 A Bunsen burner is lit in a chemistry lab. The gas used in this reaction is ethane. Identify all the energy transfers in this situation using the terms: "endothermic," "system," and "energy". (A:3) Next page

LIFE SCIENCES/GRADE 10 9 FET MDUGUST 2024 ESTION 3 Read the extract below and answer the questions that follow Carolus Linnaeus established a hierarchical classification system of grouping similar organisms together. He grouped organisms from broad groups called Kingdoms down to the smallest groups called species. By making use of his system, a lion is fully classified as follows; Animalia, Chordata, Mammalia, Camivore, Felidae, panthera e 3.1.1 According to Linnaeus' system, which class does the lion belong to? 3.1.2 The lion's scientific or binomial name, panthera leo, has been written incorrectly Rewrite it correctly 3.1.3 Why is it necessary for organisms to have scientific names? The table below shows the results of an investigation which measured the average global carbon dioxide levels in the atmosphere over a five-year period (1) (2) (2) (5) Year Carbon dioxide level (parts per million) 2004 376.0 2005 377,0 2006 379,5 2007 381,0 2008 383,5 3.2.1 Draw a line graph to show the…

Cesium chloride is used to prepare dense solutions required for isolating cellular components with a centrifuge. A 40.0 wt% solution of CsCl (FM 168.36) has a density of 1.43 g/mL. (a) Find the molarity of CsCl. (b) How many milliliters of the concentrated solution should be diluted to 500 mL to make 0.100 M CsCl?

3. Use the equilibrium constants for reactions 1 and 2 to calculate Kc for reaction 3. (5 pts) Reaction 1: A3+(aq) + 3B-(aq) = AB3(s) Kc = 2.5 × 1025 Reaction 2: H*(aq) + B-(aq) = HB(aq) Kc = 8.2 × 108 Reaction 3: AB3(s) + 3H*(aq) = A³*(aq) + 3HB(aq) Kc = ?