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A 250.0 ml sample of tap water is found to contain 6.000 microgram of arsenic What is the concentration of arsenic in ppb?
To find the concentration of arsenic in ppb, we need to convert micrograms to grams and then calculate the concentration. First, convert 6.000 micrograms to grams by dividing by 1,000,000. This gives you 0.000006 grams of arsenic. Then, calculate the concentration by dividing the mass of arsenic by the volume of water (in liters) and multiplying by 1 billion to convert to ppb. The concentration of arsenic in the tap water sample is 24 ppb.
Can you shower in water that has a 065 ppb arsenic level?
This should be safe. The USEPA has an arsenic standard for drinking water of .010 parts per million (10 parts per billion). This is for total arsenic both organic and inorganic. Toxicity varies as the type. The minimum detection limit for arsenic is in the 1-5 ug/L range (1 to 5 ppb). Use of asenic contaminated water above the drinking water standard should cause no problems if the water is not drunk during the shower.
What is Safe arsenic level in drinking water?
Arsenic may be found in water which has flowed through arsenic-rich rocks. Severe health effects have been observed in populations drinking arsenic-rich water over long periods in countries world-wide. 0.01 mg/L was established as a provisional guideline value for arsenic. Based on health criteria, the guideline value for arsenic in drinking-water would be less than 0.01mg/L. Because the guideline value is restricted by measurement limitations, and 0.01 mg/L is the realistic limit to measurement, this is termed a provisional guideline value.
What is the maximum concentration of mercury allowed in drinking water in the untited states?
In the United States, the maximum allowable concentration of mercury in drinking water is set at 0.002 milligrams per liter (mg/L), or 2 parts per billion (ppb), by the Environmental Protection Agency (EPA). This standard is part of the National Primary Drinking Water Regulations, which aim to protect public health by limiting contaminants in drinking water.
What are the Permissible limits of heavy metals in water?
Permissible limits of heavy metals in water are set by regulatory bodies such as the EPA or WHO. For example, the EPA sets limits of 5 parts per billion for lead and 10 parts per billion for arsenic in drinking water. Exceeding these limits can pose health risks to humans and ecosystems.
Does tobacco contain arsenic?
In minute quantities (approx.10-30 micrograms/kg in tobacco smoke), far too small to do any -- noticeable harm when compared to the other ingredients. And far too little to do any noticeable harm when compared to the levels of arsenic in the food we eat, the water we drink and the 'fresh air' breathe. The smoke from one cigarette MAY contain UP TO 30 nanograms (billionths of a gram) of arsenic. The maximum level of arsenic allowed in drinking water is 10 parts per billion. So half a litre of water (500grams) may contain 5,000 nanograms of arsenic, equivalent to that from over 150 cigarettes or more, and still be considered 'safe'. The maximum level of arsenic in food, such as bacon and eggs, is 500 parts per billion. A 'safe' egg weighing approximately 60 grams may contain up to 30,000 nanograms of arsenic - 1,000 cigarettes-worth. P.S. Historically, some tobacco may have contained signficantly greater concentrations of arsenic. (Tobacco Control are not particular concerning the source of their 'facts'.) The insecticide lead arsenate was widely used, not only on tobacco but also on other crops, such as apples and cranberries. Its use was banned in the 1980s.
Is 1000 parts per billion of phosphate high for drinking water?
Yes, 1000 parts per billion of phosphate in drinking water is considered high and may indicate contamination. The Environmental Protection Agency (EPA) has set a Maximum Contaminant Level Goal of zero for phosphate in drinking water due to its potential harmful effects on health and the environment. It is recommended to contact your local water provider for further guidance on suitable actions to address this issue.
Natural flouraid decrees dental caries same as added flouraid?
It all has to do with the concentration of FLUORIDE. Through extensive research over many decades, it has been determined that the optimal fluoride concentration in drinking water supplies to reduce the incidence of dental cavities in the population is 1 part per billion. If this concentration occurs naturally in a water supply, nothing needs to be done. If the naturally occurring fluoride is below the optimal concentration, addition fluoride can be added as necessary.
My phosphate levels in drinking water is 2500parts per billion is that harmful to my health?
I am thinking so.
What are three ways you can measure concentration?
The three main ways are: molarity (M) = moles solute/liters solution; molality (m) = moles solute/kilograms solvent; mole fraction = moles 1 component/total moles all components. There's also percent by volume, percent by mass, and normality.
What are two way of expressing the concentration?
The units parts per billion, or ppb, works just like percent, except that instead of being out of 100, it is out of 1,000,000,000 (1 x 109) For instance, if the concentration of a certain molecule is 5 ppb, that means for every billion molecules in the mixture, only five are that one molecule. So to convert ppb to a percent, divide by 1 x 107. You can also use parts per million (ppm), which is out of 1 x 106, or parts per trillion, ppt, which is out of 1 x 1012.
How many calories does drinking coffee burn?
Almost none. Coffee does not increase metabolism significantly.
