Which of the following has the highest pH?

A. 1 M HCl
B. 0.01 M HCl
C. 0.1 M HCl
D. 0.001 M HCl

Answer:

404 persons

Explanation:

To get n= number of persons

We use this formula

n = I(Dc - EaC)Eaf

I = 6000 = inflow rate

Dc = desired concentration = 1000

Eac = Exhaled air concentration = 280ppm = 0.00028

Exhaled air flow rate = Eaf = 0.0107

When we put values into the formula above

6000(0.001-0.00028)/0.0107

= 6000(0.00072)/0.0107

= 4.32/0.0107

= 403.7

= 404 persons

Red: weak

Orange: Strong

Answer:

all soil are also different due to how they were form

Answer:

0.0153 mol

Explanation:

Mass of crucible and lid: 29.307 g

Mass of crucible, lid, and silver: 30.958 g

Number of moles = Mass /Molar mass

Mass of Silver = Mass of crucible, lid, and silver  -  Mass of crucible and lid

Mass of siilver = 30.958 g - 29.307 g

Mass of silver = 1.651 g

Molar mass of silver = 107.868 g/mol

Number of moles = 1.651 g / 107.868 g/mol

Number of moles = 0.0153 mol

Answer:

Explanation:according to question:

. Nacl (aq) + AgNO3 (aq) --> AgCl

(s) + NaNO3 (aq).balanced.

1. Dependant Variable

2. Scientific Method

3. Data

4. Consistency

5. Metric Balance

6. Mean

7. Technology

8. Dependant Variable

9. Hypothesis

10. Spring Scale

Hello! I hope this helped and please correct me if some are wrong. I did my research and matched them. Have a good one!

Answer:

hope it is helpful to you

Answer:

3.2 g/cm3

Explanation:

Mass = 253 g

Volume = 80.0 cm3

Density = Mass / Volume = 253 g / 80.0 cm3

Density = 3.1625 g/cm3

The precision rule means the answer must not have more significant values than the value with the least number of significant figures. In this case, the value with the least number of significant figures is 80.0  with two signiificant figures. Hence;

Answer = 3.2 g/cm3

Answer:

404g

Explanation:

Answer:

Oxygen and chlorine

Explanation:

oxygen and chlorine are most likely to form covalent compounds

The bond angles around carbon in the triple bond are 180 degrees and it is sp hybridized. option B is correct

This hybridization process involves mixing the valence s orbital with one of the valence p orbitals to yield two equivalent sp hybrid orbitals that are oriented in a linear geometry.

The set of sp orbitals appears similar in shape to the original p orbital, but there is an important difference. The number of atomic orbitals combined always equals the number of hybrid orbitals formed.

The p orbital is one orbital that can hold up to two electrons. The sp set is two equivalent orbitals that point 120° from each other. The two electrons that were originally in the s orbital are now distributed to the two sp orbitals, which are half filled.

Therefore, due to the sp hybrid and 120-degree angle option B is correct

learn more about hybridization, here :

https://brainly.com/question/23038117

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Answer:

48 g/mol

Explanation:

Step 1: Calculate the mass of the gas (m)

According to the law of conservation of mass, the mass of the solid before the decomposition must be equal to the sum of the masses of the solid residue and the gas

mSolid = mResidue + mGas

mGas = mSolid - mResidue = 4.73 g - 4.10 g = 0.63 g

Step 2: Convert 320 cm³ to L

We will use the conversion factor 1 L = 1000 cm³.

320 cm³ × 1 L/1000 cm³ = 0.320 L

Step 3: Calculate the moles of gas (n)

The gas is at room temperature (298.15 K) and room pressure (1 atm). We can calculate the moles of gas using the ideal gas equation.

P × V = n × R × T

n = P × V/R × T

n = 1 atm × 0.320 L/(0.0821 atm.L/mol.K) × 298.15 K = 0.0131 mol

Step 4: Calculate the molecular mass of the gas (M)

We will use the following expression.

M = m/n = 0.63 g/0.0131 mol = 48 g/mol

Answer:

1s22s2

Explanation:

the Solution is the answer A.True

Answer:

if you did it would probably make it bigger...

Explanation:

:)

Answer:

llo

Explanation:

efficent: well orgainzed, completed with mimumin amount of effort

capable is the correct answer accept it surely

Answer: [tex]5.15\times 10^5kg[/tex]

Explanation:

According to avogadro's law, 1 mole of every substance weighs equal to the molecular mass and contains avogadro's number of particles.

To calculate the number of moles, we use the equation:

Putting in the values we get:

[tex]\text{Number of moles}=\frac{1.00\times 10^{31}}{6.023\times 10^{23}}=0.166\times 10^{8}moles[/tex]

1 mole of phosphorous [tex]P[/tex] weighs = 31 g

Thus [tex]0.166\times 10^8[/tex] moles of phosphorous [tex]P[/tex] weigh=[tex]\frac{31}{1}\times 0.166\times 10^8=5.15\times 10^8g=5.15\times 10^5kg[/tex]

Answer:

Yes.....

Explanation:

the decay half-life of a radioactive material can be changed. Radioactive decay happens when an unstable atomic nucleus spontaneously changes to a lower-energy state and spits out a bit of radiation. ... It is impossible to predict when an individual radioactive atom will decay.

Answer:

silicone (Si) is the answer

Answer:

See attachment.

Explanation:

Elements that are in the same group will definitely possess similar characteristics because they tend to have the same valence electron which determines their reactivity.

On a periodic table, elements in the same group can be found arranged on the same column in the periodic table.

Therefore the two elements that have similar characteristics are those two elements you can see on the same column in group 2. See the two elements indicated in the attachment below.

Answer:

7.12 × 10⁻³ M/s

Explanation:

Step 1: Write the balanced reaction

2 SO₂ + O₂ ⇒ 2 SO₃

Step 2: Establish the appropriate molar ratio

According to the balanced equation, the molar ratio of O₂ to SO₃ is 1:2.

Step 3: Calculate the rate of formation of SO₃

The rate of loss of O₂ is 3.56 × 10⁻³ mol O₂/L.s. The rate of formation of SO₃ is:

3.56 × 10⁻³ mol O₂/L.s. × 2 mol SO₃/1 mol O₂ = 7.12 × 10⁻³ mol SO₃/L.s

Answer: If the Sun had an even greater mass then it currently does, it would have a larger gravitational pull and since it's heat would be closer to Earth, both by magnitude and gravity, life on Earth wouldn't be possible and life on Mars would be reality. Also, when the sun would explode, it would have a larger supernova and possibly create a white dwarf (something that only happens to red supergiant stars when they die), with a gravitational force so strong it wold have two beams of light coming out it's north and south poles (like a black hole).

I hope this helps!

Answer:

Electromagnetic wave is defined as the wave which is associated with both electrical and magnetic component associated with them. They can travel in vacuum as well and travel with the speed of light.

The electromagnetic radiations consist of radio waves, microwaves, infrared ,Visible , ultraviolet, X rays and gamma rays arranged in order of increasing frequency and decreasing wavelengths.

The visible reagion contains Violet , Indigo , Blue , Green , Yellow , Orange and Red in order of increasimg wavelength and decreasing frequency.

Answer:

No its is the oxidation half

Explanation:

Because Pb lost [tex]2e^{-}[/tex]

and oxidation is losing, I abbreviate it in (OIL) not oil that used in kitchen

OIL=Oxidation Is Losing electrons

Experts say this isn’t unusual with vaccinations because the estrogen in women’s bodies is designed to elicit a stronger immune response.

Hope it helps you ☺

Happy Learning ⭐

Answer:

B- The polarity of the molecules and hydrogen bonding between molecules.

Explanation:

Hope this helps:)

Answer:

the concentration of isopropanol is 3 ppm.

Explanation:

The isopropanol concentration is

As we know that

Concentration = mass isopropanol ÷mass of water

= 6 mg ÷ 2 kg

= 3 mg/Kg

Now convert 3 mg/Kg to ppm.

As we know that

1 mg/Kg = 1 ppm

So,  

 3 mg/Kg = 3 ppm

Hence, the concentration of isopropanol is 3 ppm.

Answer:

C6H12O6

Glucose

Explanation:

Glucose is a monocarbohydrate

carbohydrates always have only C, H, and O

brainliest plz