PLEASE HELP ASAP I LOVE YOU I'LL GIVE BRAINLY

Answer:

The boiling point of iodine is 363.7°F / 184.3°C

Answer:

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

[tex]volume = \frac{mass}{density} \\[/tex]

From the question we have

[tex]volume = \frac{25}{0.8765} \\ = 28.52253...[/tex]

We have the final answer as

Hope this helps you

Answer:

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

mass = Density × volume

From the question we have

mass = 25 × 3.26

We have the final answer as

Hope this helps you

Answer:

1. First, I would observe the fire and the conditions of the scene, looking for the origin of the fire and looking in an accelerant was used. If I could find the origin of the fire I would make sure to not have any evidence damaged, and if I could not find the origin of would look from other forms of evidence, like clothing, flammable liquids, or igniters.

2. Secondly, I would make sure to preserve the area, and document the scene, with pictures and notes and any other forms of recording. It is important to initiate permanent documenting of the scene.

3. Thirdly, I would try to find anything flammable with a snider, and run the tests on what it could be. It is also important to make sure everybody is safe, and to evaluate for any safety hazards. Finally, I would create safety zones and communicate the hazards to people near the scene.

4. I would next contact the incident commander, and also search for any evidence that says whether the fire was an accident or was arson. If the fire was arson, I would locate any evidence that could lead to suspects, and if the fire was an accident, I would try to find all the evidence that shows how it happened.

5. Once I collect all the evidence, I would organize it in the best way possible and then I would use the hydrocarbon method in order to test the evidence that I found.

6. After the results come back based on the evidence, I would compare the results with the information found about the fire security in the building, the people involved, and I would start in trying to solve the crime.

Answer:

A) [tex]6.5\times 10^{23}\ \text{molecules}[/tex]

Explanation:

m = Mass of water = 38.9

M = Molar mass of water = 18 g/mol

[tex]N_A[/tex] = Avogadro's number = [tex]6.022\times 10^{23}\ \text{mol}^{-1}[/tex]

The reaction of electrolysis would be

[tex]2H_2O(l)\rightarrow 2H_2(g)+O_2(g)[/tex]

Number of moles of [tex]H_2O[/tex]

[tex]n=\dfrac{m}{M}\\\Rightarrow n=\dfrac{38.9}{18}\ \text{mol}[/tex]

From the reaction it can be seen that 2 moles of [tex]H_2O[/tex] gives 1 mole of [tex]O_2[/tex]

So, number of moles of [tex]O_2[/tex] produced is

[tex]\dfrac{38.9}{18}\times \dfrac{1}{2}=1.081\ \text{mol}[/tex]

Number of molecules

[tex]1.081N_A=1.081\times 6.022\times 10^{23}\\ =6.5\times 10^{23}[/tex]

So, [tex]6.5\times 10^{23}\ \text{molecules}[/tex] of oxygen is produced.

Answer:

1. Newton's third law of motion

2. Unbalanced

3. Action

Answer:

When we cook food in the kitchen, that's the region of higher concentration of the smell. By diffusion, the smell spreads to the whole room and thereby whole house, so anyone standing at a distance, can smell it.

Answer:

smell of cooked food spread fast bc when something is heated up, the kinetic energy of the molecules/particles increases and some of them even mix with the air and moves around. the first answer is also correct (i just explained it more detaily)

so, this is the reason :)

mark as brainliest dagini ;)

Answer:

neutron

Explanation

neutrons have no net charge

Answer:

c

Explanation:

I think that's the answer

Answer:

The water is the medium of the wave

3.03 × 10²⁵ formula units KCl

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Unit 0

Atomic Structure

Step 1: Define

50.3 mol KCl (Potassium chloride)

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

[tex]\displaystyle 50.3 \ mol \ KCl(\frac{6.022 \cdot 10^{23} \ formula \ units \ KCl}{1 \ mol \ KCl} )[/tex] = 3.02907 × 10²⁵ formula units KCl

Step 4: Check

We are given 3 sig figs. Follow sig fig rules and round.

3.02907 × 10²⁵ formula units KCl ≈ 3.03 × 10²⁵ formula units KCl

Answer:

The electronegativity difference of the atoms in the bond.

Explanation:

Carbon is electropositive while Oxygen is highly electronegative, hence highly polar due to strong intermolecular forces.

The molecule is not symmetrical because it's dipole moments don't cancel out.

Answer:

6

Explanation:

The equation given in this question is:

H₂ + N₂ ---> NH₃

To balance this equation i.e to make sure that the number of atoms on each side of the equation is the same, one would make use of coefficients.

The balanced equation is:

3H₂ + N₂ ---> 2NH₃

The coefficients are the number behind each element or molecule. According to this question, the sum of each coefficient is 3 + 1 + 2 = 6

Answer:

A

Explanation:

RMM of ca(c2h302)2=158

%Ca= 40/158×100=25.3

%C=48/158×100=30.3

%H=6/158×100=3.7

%O=64/158×100=40.5

Answer:

a) 25.3% Ca, 30.4% C, 3.8% H, 40.5% O

Explanation:

Molar mass of Ca(C₂H₃O₂)₂  = 158.160 g/mol

percent composition:

Ca = (40 /158.160 ) × 100

Ca = 25.3%

C = (48 /158.160 ) × 100

C = 30.4%

H = (6 /158.160 ) × 100

H = 3.8%

O = (64 /158.160 ) × 100

O = 40.5%

40.5% + 3.8% + 30.4% + 25.3% = 100%

It means 1st option is correct.

Answer: It would be Sp2, because H3O+ has planar structure.

Answer:

Mostly Metals, But hydrogen is the only one that isn't.

Answer:

a. 1.99 mol

General Formulas and Concepts:

Chemistry - Atomic Structure

Explanation:

Step 1: Define

116 g NaCl

Step 2: Identify Conversions

Molar Mass of Na - 22.99 g/mol

Molar Mass of Cl - 35.45 g/mol

Molar Mass of NaCl - 22.99 + 35.45 = 58.44 g/mol

Step 3: Convert

[tex]116 \ g \ NaCl(\frac{1 \ mol \ NaCl}{58.44 \ g \ NaCl} )[/tex] = 1.98494 mol NaCl

Step 4: Check

We are given 3 sig figs. Follow sig fig rules and round.

1.98494 mol NaCl ≈ 1.98 mol NaCl

Answer:

Beta decay is most common in elements with a high neutron to proton ratio. Gamma decay follows the form: In gamma emission, neither the atomic number or the mass number is changed. A high energy gamma ray is given off when the parent isotope falls into a lower energy state.

Explanation:

pls mark me as brainliest

Answer: C

Explanation:

Answer:

The volume will goes to decrease.

Explanation:

The given problem will be solved through the Boyle's law,

"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"

Mathematical expression:

P₁V₁ = P₂V₂

P₁ = Initial pressure

V₁ = initial volume

P₂ = final pressure

V₂ = final volume  

when pressure is going to increase the volume will goes to decrease and vice versa.

Consider the initial volume is 10 L at initial pressure of 15 atm when pressure is increased to 30 atm the volume will be,

Now we will put the values in formula,

P₁V₁ = P₂V₂

15 atm × 10 L = 30  atm × V₂

V₂ = 150 atm. L/ 30 atm

V₂ = 5 L

Answer:

Rate = K[NH₄⁺][NO₂⁻]

Explanation:

In kinetics studies of reaction, rate law is a mathematical expression that relates speed of reaction with concentrations of the reactants. For a reaction:

aA + nN → cC + dD

The rate law is expressed in terms of [A] and [B] as follows:

Rate = K[A]ᵃ[N]ⁿ

Where K is rate constant.

For the reaction:

NH4+ + NO2– ⟶ N2 + 2H2O

The rate law is:

As was said in the problem, the rate is porportional to [NH₄⁺] and to [NO₂⁻]

Answer:

C.

The pan will be the same temperature as the stove.

Explanation:

Answer:

B

Explanation:

all living things are composed of one or more cells

Answer:

20.05  ×10²³ molecules

Explanation:

Given data:

Mass of hydrogen = 10 g

Number of molecules of ammonia = ?

Solution:

Chemical equation:

3H₂ + N₂       →      2NH₃

Number of moles of hydrogen:

Number of moles = mass / molar mass

Number of moles =  10 g /  2 g/mol

Number of moles =  5 mol

now we will compare the moles of hydrogen and ammonia.

                 H₂            :           NH₃

                  3             :            2

                   5            :           2/3×5 = 3.33 mol

Number of molecules of ammonia:

1 mole contain 6.022 ×10²³ molecules

3.33 mol × 6.022 ×10²³ molecules / 1 mol

20.05  ×10²³ molecules

Answer:

Sodium, Oxygen and Hydrogen

Explanation:

Na= Sodium

O= Oxygen

H= Hydrogen

Answer:

in terms of chemistry, the forward reaction balances the backward reaction :)

Explanation:

Answer:

The proportion of light transmitted by glazing is specified by the Visible Light Transmittance, which is recorded as either TVw (visible transmittance of the window) or VLT (visible light transmittance). These terms are interchangeable, but in Australia, the Window Energy Rating Scheme uses Tvw in its ratings.

While the VLT/Tvw rating varies between 0 and 1, most double glazed windows rate between 0.3 and 0.7 , which means that between 30% and 70% of the available light passes through the window. The illustration above shows you how the view changes, as the amount of light getting through the window changes.

Explanation:

Answer:

There are 504,576,000 seconds in 16 years.

Explanation:

To calculate the number of seconds in 16 years, let's first use simpler units since we are going to be working with large numbers.

First, calculate the number of seconds in one day (24 hours). We can do this with the common knowledge that there are 60 seconds in a minute, and 60 minutes in an hour, multiply the seconds and minutes:

[tex]60*60=3600[/tex]

Therefore, there are 3600 seconds in an hour. Since we know that there are 24 hours in a day, we can multiply the seconds by hours:

[tex]3600*24=86400[/tex]

Therefore, there are 86,400 seconds in a day.

Knowing that there are 365 days in a year, we can multiply 86,400 seconds by 365 days to calculate the number of seconds in a year:

[tex]86400*365=31536000[/tex]

Therefore, there are 31,536,000 seconds in a year.

Since the question is asking the number of seconds in 16 years, we can simply multiply 31,536,000 seconds by 16 years:

[tex]31536000*16=504576000[/tex]

Therefore, there are 504,576,000 seconds in 16 years.