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181.4 new weight? Deal with lots of chemicals and other reagents but haven't heard of new weight. Net weight? molecular weight?
If it says the package contains 10 grams, go with 10 grams. that 181.4g thing is confusing.
Here is one thing you can do. Hold 10 pennies in one hand and the package in the other. They should be about the same, if the package weighs about 180 pennies, it's net weight is going to be that 181 new weight that you read.
Since you don't have a scale, and powders do not always have the same volume, you'll have to guess without a scale.
If it is 10 grams and you want 600mg (or .6g) per gallon find the ratio of gallons the package you have will make, and add that portion to 1 gallon of water.
.6g for one gallon.. so if your package is 10 grams, it will make about 16.5 gallons. Take about 1/16th of the total amount in your package and add it to one gallon.
If your package is 180 grams, it will make 300 gallons, so take 1/300 of the package and add it to a gallon.
181.4 new weight? Deal with lots of chemicals and other reagents but haven't heard of new weight. Net weight? molecular weight?
If it says the package contains 10 grams, go with 10 grams. that 181.4g thing is confusing.
Here is one thing you can do. Hold 10 pennies in one hand and the package in the other. They should be about the same, if the package weighs about 180 pennies, it's net weight is going to be that 181 new weight that you read.
Since you don't have a scale, and powders do not always have the same volume, you'll have to guess without a scale.
If it is 10 grams and you want 600mg (or .6g) per gallon find the ratio of gallons the package you have will make, and add that portion to 1 gallon of water.
.6g for one gallon.. so if your package is 10 grams, it will make about 16.5 gallons. Take about 1/16th of the total amount in your package and add it to one gallon.
If your package is 180 grams, it will make 300 gallons, so take 1/300 of the package and add it to a gallon.