The element rhenium (Re) has two naturally occurring isotopes, 185Re and 187Re, with an average atomic mass of 186.207 amu. Rhenium is 62.60% 187Re, and the atomic mass of 187Re is 186.956 amu. Calculate the mass of 185Re.
Herein, how many protons are in ag 107?
Explanation: There are two stable isotops of silver (Ag): Ag-107: 47 protons and 60 neutrons →10747Ag. Ag-109: 47 protons and 62 neutrons →10947Ag.
What is the atomic mass of silver?
What is the average atomic mass of neon?
20.1797 u ± 0.0006 u
What is the use of platinum?
Platinum is used in catalytic converters, laboratory equipment, electrical contacts and electrodes, platinum resistance thermometers, dentistry equipment, and jewelry.
Is platinum very reactive?
Some metals are very unreactive. That means they do not easily take part in chemical reactions. For example platinum does not react with oxygen in the air, even if it is heated in a Bunsen burner flame. Some metals are very reactive.
Is Platinum Rare?
While many people invest in Gold and Silver, one Precious Metal that is often overlooked is Platinum. “Platinum is much rarer than both Gold and Silver — so rare, in fact, that all of the Platinum ever mined could fit into your living room,” according to finance group Outsider Club.
How much is the platinum in a catalytic converter worth?
There are between 3-7 grams of platinum group metals in a standard catalytic converter, but the amount varies based on manufacturer and model. Keep in mind that the minimum lot size we accept for smelting and refining is 500 catalytic converters or 1000 pounds of loose catalyst.
How much is a gram of platinum?
The per ounce cost will generally go down as the amount of ounces purchased goes up. For example, a dealer currently has a 1 ounce platinum Valcambi bar selling for $1,533 and a 10 ounce varied brand platinum bar selling for $15,030. If you do the math, then the 10 ounce bar offers a savings of $30 per ounce.
How much is a new catalytic converter?
The catalytic converter is going to be fairly expensive to replace. In older cars, those made before 1981, the cost can range between $100 and $600. Obviously, the kind of car you have and the complexity of replacing the converter are going to increase the cost.
Why do catalytic converters fail?
A bad oxygen sensor, dirty mass air flow sensor or an engine misfire will also allow unburned fuel to pass into the exhaust. This fuel burns in the catalytic converter. Oil from stuck piston rings, bad valve guides, etc. also enters the exhaust.
What are the symptoms of a bad catalytic converter?
Here are five signs that something may be wrong with your catalytic converter:
Your vehicle’s fuel efficiency suddenly drops.
Your vehicle doesn’t accelerate when you step on the gas pedal.
Your vehicle may refuse to start.
Your vehicle fails an emissions test.
The MIL or Check Engine light comes on.
How many miles does a catalytic converter last?
The truth is, on modern vehicles, the catalytic converter should last the life of the car or truck, given an “average” life of about 100,000 miles (160,934 kilometers). Good thing, too, because this auto part uses rare, precious and therefore expensive metals such as gold, palladium or rhodium.
What problems can a clogged catalytic converter cause?
If the engine responds sluggishly or quits after running for a while, a clogged converter could be to blame. Catalytic converters can overheat because of excessive amounts of unburned gas caused by a misfiring spark plug or a leaky exhaust valve. In addition, a failed oxygen sensor can cause overheating.
Can a bad catalytic converter cause poor gas mileage?
A properly operating catalytic converter will not hurt fuel economy and has no negative affect on performance. If your car is experiencing a performance problem, this could be the cause of the fuel economy issue. A good mechanic will look beyond your engine.
What can damage a catalytic converter?
Possible causes are worn piston rings, faulty valve seals, failed gaskets or warped engine components. Spark plugs that don’t fire or misfire cause unburned fuel to enter the exhaust system. The unburned fuel ignites inside the converter and could result in a partial or complete melt down of the ceramic catalyst.
How much does it cost to replace a catalytic converter?
Installation takes about an hour on average, depending on the vehicle; total costs for parts and labor can be $300-$3,000 or more. CarMD.com names replacing a catalytic converter as the third most common car repair related to a “check engine” warning light, and estimates the average cost for parts and labor at $1,029.
Is it expensive to fix a catalytic converter?
Repairing or replacing a catalytic converter can cost close to $2,000. In order to properly filter hydrocarbons and reduce your car’s emissions, catalytic converters use precious metals such as platinum or palladium. These are expensive for mechanics to purchase, resulting in a higher repair cost.
Do you need to have a catalytic converter?
Yes, every passenger vehicle sold in the past 35 years is required to have a “cat” – the catalytic converter used in the exhaust system to reduce harmful emissions and allow the vehicle to pass mandatory smog tests.
Is it against the law to drive a vehicle without a catalytic converter?
Just replacing a catalyst to put on a bigger one or better one is illegal per the EPA. It is perfectly legal to drive without a catalytic converter, under certain circumstances: your vehicle is so old it never had one, or you’re not driving on public roads. Otherwise, get one put on.
Why do catalytic converters make cars more expensive?
Catalytic converters. Modern cars have a catalytic converter to help reduce the production of toxic gases. This increases the rate of reaction of carbon monoxide and unburnt fuel from exhaust gases with oxygen from the air. The product from this is carbon dioxide and water, which is less harmful to the environment.
Why are catalytic converters important?
In order to reduce air pollution, modern automobiles are equipped with a device called a catalytic converter that reduces emissions of three harmful compounds found in car exhaust: Carbon monoxide (a poisonous gas) Nitrogen oxides (a cause of smog and acid rain)
What chemical is in a catalytic converter?
A catalytic converter is a device used to reduce the emissions from an internal combustion engine (used in most modern day automobiles and vehicles). Not enough oxygen is available to oxidize the carbon fuel in these engines completely into carbon dioxide and water; thus toxic by-products are produced.