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(1)Town gas is produced from coal. (2)Town gas contains hydrogen as the major component. (3)Oxygen is added to enhance the flammability of town gas prior to its delievery to consumers. (2) and (3) are correct. That means there is O2 in town gas,why H2 for
The fact that some carbon dioxde is produced when the residue is treated with acid means that there is a carbonate present. 2. If 50% of the mixture is magnesium carbonate (relative mass = 84) and it decomposes to MgO (relative mass 40), then the 50% loses 44/84 x 100 % of its mass = 52.4% so the mass loss of the 100% mixture = 26.2% BUT, this ...
2022年1月24日 · hi i need help with my isaac physics board on ideal gases g2.3 How many molecules of gas do you need in a 100cm ^3 cylinder to exert a pressure of,1.0×10 ^8 Pa at a temperature of 800 ∘ C? Give your answer to 2 significant figures. 2.7 A water fire extinguisher contains about four litres of air at 10 ^7 Pa and 20 ∘ C.
2021年9月14日 · The clone town survey may be useful to look at and conduct yourself to see to what extent your town/city is considered one. Hi, I’m doing my a level geography nea coursework on “to what extent is my local city a clone town” and was wondering if anyone has done this topic or anything similar to it, could use some tips!
Calculate the relative molecular mass of a gas which has a density of 2.615g dm-3 at 298K and 101kPa Ok so I’ve got the working out and the answer but I want to know why the volume is 1dm-3 V= 1dm-3 Moles = pV/rt Moles = 101000*(1/1000) / 8.31*298 Moles = 0.0408 Mass= density * volume Mass = 1*2.615 Mass= 2.615 Mr = mass /moles Mr= 2.615 / 0.0408 Mr = 64.09 I understand the working out and ...
2021年1月22日 · The diameter of the lumen (hole) of the capillary tubing was 1 mm. The volume of a capillary tubing is given by πr2l, where π is 3.14 and l = length. Calculate the volume of gas produced in cm3 hour–1. Show your working. So in 1 hour it moves 1.5/24 cm which is the length. 1mm equals 0.1cm so that is the diameter.
2020年7月11日 · They should be banned from all town and city centres, allowing people to walk and cycle in peace.’ Write a letter to the Minister for Transport arguing your point of view on this statement. (24 marks for content and organisation) (16 marks for technical accuracy) [40 marks] Dear Minister for Transport I urgently need your support and trust to assist in making this country exceptional again.
2023年1月10日 · Rental contracts can go for 3 month to 2 years in my experience. It's usually not woth the landlord's while to have something as short as 3 months, so they usually have 1 year by default. If you do get something as short as 3-6 months, it's usually for a room. When moving into a room, keep it light. There is usually not that much space and if ...
2024年1月5日 · Table 3 Time / minutes Total volume of gascollected / cm3 10 0.3 20 0.9 30 1.9 40 3.1 50 5.0 60 5.2 Calculate the rate of gas production in cm3 g–1 min–1 during the first 40 minutes of thisinvestigation. Show your working. Can anyone help me with this question I
Gas question. A. internet tough guy. 13. A hand pump was used to raise the pressure of the air in a flask of volume 1.2 x 10-4m3, without and when with powder in the flask. - Without the powder in the flask, the pressure increased from 110kPa to 135 kPa. - With 0.038kg of powder in the flask, the pressure increased from 110kPa to 141kPa.
