help please asap!!!

5. The maximum acceptable concentrations of the chemicals listed in Table 2 on page 283, are based on an average daily intake of 1.5 L of drinking water.

a) If a community’s drinking water contained the maximum acceptable levels of lead, how much lead would a person in the community consume in a year?

b) Would you willingly drink this water? Give reasons for your decision.


Answers

Answer 1

Based on the the US Environmental Protection Agency guidelines, the maximum allowable concentration of lead in drinking water, yearly intake of lead by the individual = 8.21 mg.

I would not willingly drink the water due to the risk of lead poisoning.

What is the maximum acceptable concentration of Lead in Drinking water?

Based on the US Environmental Protection Agency guidelines, the maximum allowable concentration of lead in drinking water is 0.015 mg/L.

a)Given daily average intake of water is 1.5, in one year;

Volume of water intake = 1.5 * 365 = 547.5 L

Yearly intake of lead by the individual = 0.015 mg/L * 547.5

Yearly intake of lead by the individual = 8.21 mg

b) I would not willingly drink the water due to the risk of lead poisoning.

In conclusion, safe, drinking water should be free on contaminants such as lead to avoid lead poisoning.

Learn more about Lead poisoning at: https://brainly.com/question/7576315

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Related Questions

What is the difference between a chemical symbol and a chemical formula?​

Answers

Answer: A chemical symbol is a one- or two-letter designation of an element. Compounds are combinations of two or more elements. A chemical formula is an expression that shows the elements in a compound and the relative proportions of those elements. Many elements have symbols that derive from the Latin name for the element

Describe the modern system of classification. Help please!

Answers

Answer:

its called TAXON0MY

Explanation:

they are classified in eight steps namely doma!n, k!ngdom, phylum, class, order, family, genus, and spec!es

but sometimes we do not include doma!n

if you want to name an organism you use both the genus group and the spec!es group

Example:

The scientific name for humans like us is h0m0 sap!ens

H0m0- This is our genus group

sap!ens- This is our spec!es group

sorry for using the exclamation mark it means i

Answer:

The modern system of classification is a hierarchy with eight levels. These levels are domain, kingdom, phylum, class, order, family, genus, and species. There are three domains and six kingdoms in the modern system.

Explanation:

Which of these are correct

Answers

Answer:

A

Explanation:

I'm doing that rn and that's the answer

A gas has a volume of 500cm3 when a pressure of 100,00N is exacted on it what will be it's volume if the pressure is changed to 150mm mecury at same temperature

Answers

Answer:

See explanation below

Explanation:

At first sight, it seems that the innitial pressure of 100,00 N would be 100,00 N/m² because pressure does not have units of newton alone. If this is true, then the calculations are the following (If it's not, but it's actually mm Hg, then skip the part of the conversion, and just do the procedure of solving for the volume).

The innitial pressure is 100 N/m² or simply 100 Pa. As the second pressure is in mm Hg, let's convert the Pascal units to mm Hg:

1 Pa -----> 0.007501 mm Hg

100 ---------> X

X = 100 * 0.007501 / 1 = 0.7501 mmHg

Now that we have the innitial pressure in mm Hg, and the temperature remains constant, we use the Boyle's law to solve for this:

P₁V₁ = P₂V₂

V₂ = P₁V₁ / P₂  

Using this expression, let's solve for V₂:

V₂ = 0.7501 *¨500 / 150

V₂ = 2.5 cm³

Now, it's the innitial pressure is 100 mm Hg then the volume:

V₂ = 100 * 500 / 150

V₂ = 333.33 cm³

Check the units of the innitial pressure, one of these results should be the correct answer. If it's not, then please post again the question with the correct units.

Hope this helps

Are physical characteristics of an organism not genetically passed down?

Answers

That is false. Physical characteristics of an organism can be genetically passed down.

—Evidence—

An inherited trait is a feature or characteristic of an organism that has been passed on to it in its genes. This transmission of parental traits to their offspring always follows certain principles or laws. The study of how inherited traits are passed on is called genetics.

In an ecosystem, the  physical characteristics of an organism are genetically passed down  from one generation to another.

What is an ecosystem?

Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.

Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.

Learn more about ecosystem,here:

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how many atoms are in each compound ?

Answers

Compounds are made of two or more atoms of different elements, such as water (H2O) and methane (CH4). Atoms are not drawn to scale. Molecules of compounds have atoms of two or more different elements.

A scientist is comparing 2 samples of the same compound. One is pure and the other is impure. The compound is a solid at room temperature. Explain how the scientist could tell which is the pure compound. [2]

Answers

Answer:

A glass of mineral water is not pure water.

Explanation:

Pure chemical substances

Pouring water into a glass from a bottle

Food and drink may be advertised as ‘pure’. For example, you may see cartons of ‘pure orange juice’ or ‘pure mineral water’. This means that nothing else was added to the orange juice or mineral water during manufacture. However, these substances are not pure to a scientist. In science, a pure substance contains only one element or compound.

Mineral water is mostly water, but there are other substances mixed with it. These are the ingredients that you see listed on the bottle’s label.

Chlorine reacts very violently. What about its electron shells makes this the case?

Answers

Answer:

it readily gains another electron. the outer electron shell is closer to the nucleus, than iodine for example, which makes it less shielded (greater attraction for another electron = violent reaction to get it)

Explanation:

What are some genaral properties of gases that govern their behavior

Answers

Answer:

1. Gases may be compressed

2. Gases expand when less pressure is applied.

3. Gases can be mixed.

4. Gases exert a constant pressure on its container walls.

5. Gases have low densities.

Glass or anything that is breaking

What is the volume of 104 g of ethine under normal conditions?​

Answers

0.143 moles is the volume of 104 g of ethine under normal conditions

calculate the volume occupied by 10g of propane gas, under normal conditions of temperature and pressure

Answers

Answer:

5.5 L

Explanation:

First we convert 10 g of propane gas (C₃H₈) to moles, using its molar mass:

10 g ÷ 44 g/mol = 0.23 mol

Then we use the PV=nRT formula, where:

P = 1 atm & T = 293 K (This are normal conditions of T and P)n = 0.23 molR = 0.082 atm·L·mol⁻¹·K⁻¹V = ?

1 atm * V = 0.23 mol * 0.082 atm·L·mol⁻¹·K⁻¹ * 293 K

V = 5.5 L

What properties do atoms of the same element share? Select all that apply
atomic number
chemical reactivity
melting point

Answers

Answer: your answer is A

Explanation: the atoms has the same properties of the same element as the atomic number.

I need some help with with question:

How could you prepare 100 ml of a 0.40 mol/L of MgSO4 solution from a stock solution of 2.0 mol/L MgSO4. And then how would u prepare it?

Answers

Answer:

C1V1=C2V2

C1 is 2.0mol/l

V1=?

C2=.4mol/L

V2=100ml or for this 0.1L

V1 is 20ml

Best way to prepare this is to measure out 20ml of the 2 molar solution and add 80mL to it to get to 100mL

Explanation:

First question and I'm already stuck. Help pls!

Answers

Answer:

definite volume. indefinite shape

Answer:

Red

Explanation:

Definite volume, indefinite shape

what is used to make the dry cells ????​

Answers

Answer: The parts of a dry cell battery are as follows: at the center is a carbon rod called a cathode. The cathode is surrounded by an electrolyte paste. The paste and cathode are surrounded by a separator before finally being sealed within a zinc cylinder.

Explanation: A diagram is show below

N2 + 3H2 → 2NH3 How many grams of hydrogen are necessary to react completely with 853.42g of nitrogen in the above reaction?

Answers

Answer: 182.87 grams of hydrogen are necessary to react completely with 853.42g of nitrogen.

Explanation:

The balanced chemical reaction is :

[tex]N_2+3H_2\rightarrow 2NH_3[/tex]

[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex]  

[tex]\text{Number of moles of nitrogen}=\frac{853.42g}{28g/mol}=30.479moles[/tex]

According to stoichiometry:

1 mole of [tex]N_2[/tex] react with = 3 moles of [tex]H_2[/tex]

30.479 moles of [tex]N_2[/tex] will react with=[tex]\frac{3}{1}\times 30.479=91.437moles[/tex] of [tex]H_2[/tex]

 Mass of [tex]H_2[/tex] =[tex]moles\times {\text {Molar mass}}=91.437mol\times 2g/mol=182.87g[/tex]

Thus 182.87 grams of hydrogen are necessary to react completely with 853.42g of nitrogen.

how many atoms of alumminum are in 3.9 mol of aluminum​

Answers

Answer:

2.35 x 10²⁴ atoms Al

Explanation:

Given 3.9 moles of aluminum (Al), determine number of aluminum atoms in that quantity of substance.

By definition a mole is the mass of substance containing one Avogadro's Number (N₀) of particles. That is, 1 mole = 1 N₀ = 6.023 x 10²³ particles*.

So, if 1 mole aluminum contains 6.023 x 10²³ atoms of aluminum then

3.9 moles Al = 3.9 moles Al  x  6.023 x 10²³ atoms Al/mole Al = 2.35 x 10²⁴ atoms Al.

________________

*The complete equivalent relationship is ...

1 mole (atoms or compounds) = 6.023 x 10²³ atoms or molecules = 1 formula weight of the substance = 22.4 Liters (if in gas phase at STP conditions (0°C and 1atm pressure).

________________

Sure hope this is understandable ... if not, kick back a note. Doc

if you need 2.5 moles of of aluminum, how many atoms of aluminum is this? ​

Answers

Answer:

This can be found by my multiplying number of moles with avogadro number

So we have:

2.5 × 6.022 × 10²³

= 15.055 × 10²³

Therefore there are 15.055 × 10²³ atoms in 2.5 moles of Aluminium

If I initially have a gas at a pressure of 12 kPa, a volume of 23 liters, and a temperature of 200 K, and then I raise the pressure to 14 kPa and increase the temperature to 300 K, what is the new volume of the gas?

Answers

Answer:

The new volume of gas would be 30 L.

Explanation:

This is an example of a Combined Gas Laws problem.

What is the formula for triboron silicide?

Answers

Answer:

B₃Si

Explanation:

Let's take  break it down. From triboron silicide;

Tri - Three

Triboron - Three boron atoms

Silicide - Silicon (with an -ide suffix)

The formular is given as;

B₃Si

ssignment Vhat challenges would have existed in the spread of Christianity. pe overcome. Remember social media and cell phones did not exis R < previous​

Answers

Answer:

A lot of people rejected it outright. Christians were persecuted and killed for their beliefs, and there were no cars, etc for easy transportation. Most people had to walk everywhere since horses and the like were only for the rich and royal. Hope this helps, please give me brainliest :)

Explanation:

Answer: Your not the best a spelling...

Explanation:

what might be a formula for calculating distance

Answers

Answer:

Distance = speed * Time

hope it helps

Answer:

Distance formula (x2 - a1) ° + (y2 - Yı)?

d - d = distance

(x1, Y1) coordinates of the first point

(x2, Y2) = coordinates of the second point

please someone help it’s due today(I will give brainliest)

Answers

Answer:

physical or chemical

boiling point

brittleness

opacity

color

density

ductility

shape

hardness

lustre

malleability

melting point

smell

solubility

state of matter

taste

texture

viscosity

Explanation:

A) lizard
B) salamander
C) mouse
D) pigeon

Answers

Lizard they are both reptiles
Pretty sure the answer is D. Pigeon

what is the formula for P₃O₅?

Answers

Answer:

i hope its help you

Explanation:

and goodnight,goodevening,goodmorning

I have no idea what to put, pls help, due tmr
(science)​

Answers

Answer:

It traveled for 4 seconds at a distance of about 4.1 meters. With a velocity of 10%.

Explanation:

Which process directly moves nutrients from animals to the air?

Answers

D.Breathing

Oxygen obtained through respiration is used by cells in the cellular respiration process to obtain energy. Each animal has a different way of performing gas exchange, but we can say that it is through breathing that all animals move nutrients directly into the air through breathing

Do temperature and air pressure change in a smooth, gradual way as your balloon flies higher?

Answers

Answer:

yes ?

Explanation:

from what I have learned so far, the hair gradually gets thinner and thinner with less oxygen which would change the pressure

How is the rotation of the Sun different from the rotation of Earth?
OThe parts of the Sun rotate at different speeds and the parts of Earth rotate at the same speed.
O The Sun's equator rotates faster than its poles and Earth's equator rotates slower than its poles.
O The Sun's poles rotate faster than its equator and Earth's poles rotate slower than its equator.
O The parts of the Sun rotate in different directions and the parts of Earth all rotate in the same direction

Answers

Answer:

The Sun's equator rotates faster than it's poles and Earth's equator rotates slower than it's poles.

Explanation:

what's the correct answer? brainliest​

Answers

Answer:

Explanation:accurate but not precise

The last one is the correct answer
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