Someone help asap please i suck at chem

Convert the MCL of antimony from milligrams per liter to parts per billion (ppb).

Aleks [24]

This is an incomplete question, here is a complete question.

According to the EPA, the maximum contaminant level (MCL) of antimony in drinking water is 0.0060 mg/L.

Convert the MCL of antimony from milligrams per liter to parts per billion (ppb).

Answer : The maximum contaminant level (MCL) of antimony in drinking water in parts per billion is, 6 ppb

Explanation :

ppb : It is defined as the mass of solute present in per 1000 million $(10^{-9}g)$ of total mass.

1 ppb = $\frac{10^{-9}g\text{ of solute}}{1g\text{ of solution}}$

As we know that:

1 milligrams per liter = 1000 parts per billion

or,

1 mg/L = 1000 ppb

As, 1 mg/L = 1000 ppb

So, 0.0060 mg/L = $\frac{0.0060mg/L}{1mg/L}\times 1000\text{ ppb}$

= 6 ppb

Thus, the maximum contaminant level (MCL) of antimony in drinking water in parts per billion is, 6 ppb

6 0

3 years ago

(100 POINTS) When thermal energy (heat) is added to a reaction, it happens _________ (faster or slower)

anygoal [31]

Answer:

1) faster

2) slower

Explanation:

8 0

4 years ago

Baking soda needs an acid in the recipe in order to work. Which of these ingredients would react with the baking soda to make th

Ilya [14]

Explanation:

5.03" (and any subsequent words) was ignored because we limit queries to 32 words.

please mark me as brainliest

6 0

3 years ago

During our phase changes lab, where did we place the thermometer?

IrinaK [193]

The thermometer must be <u>in contact with the ice/water only</u>

Explanation:

In this experiment in the lab, the aim is to measure the specific latent heat of fusion of water.

The specific latent heat of fusion of a substance is the amount of heat energy required to completely melt a certain amount of the substance, mathematically:

$\lambda = \frac{Q}{m}$

where

Q is the heat supplied to the substance

m is the mass of the substance

In this experiment, the aim is to measure the specific latent heat of fusion of water. In order to do that, a mix of ice/water is heated with a certain amount of heat Q, and then it is evaluated the amount of mass m that undergoes melting.

An important precaution that must be taken in this experiment is that the temperature of the water/ice mixture remains constant and equal to the melting point of ice (otherwise, part of the heat supplied to the mixture is used to increase the temperature of the water, resulting in an inaccurate measure of Q). Therefore, a thermometer must be used to check constantly the temperature, and this thermometer must be placed inside the ice/water mixture only (It should not touch the saucepan, whose temperature can be higher).

So, the correct answer is

in contact with the ice/water only

Learn more about specific heat:

brainly.com/question/3032746

brainly.com/question/4759369

#LearnwithBrainly

3 0

3 years ago

Define Conversion Factor in CHEMISTRY? Define Conversion Factor in CHEMISTRY

Elden [556K]

A conversion factor is a ratio (or fraction) which represents the relationship between two different units :)

8 0

3 years ago