Help pls!! Question number 7

Mass of H₂O produced = 7.488 g

Given

40.8 g of C₆H₆O₃

42.8% yield

Required

mass of H₂O

Solution

Reaction

C₆H₆O₃+6O₂=>6CO₂+3H₂O

mol of C₆H₆O₃(MW = 126 g/mol) :

= mass : MW

= 40.8 g : 126 g/mol

= 0.324

Mol H₂O :

= 3/1 x mol C₆H₆O₃

= 3/1 x 0.324

= 0.972

Mass H₂O(theoretical) :

= 0.972 x 18 g/mol

= 17.496 g

%yield = (actual/theoretical) x 100%

0.428 = actual / 17.496

actual = 7.488 g

Answer:

422.1 grams

Explanation:

First find the atomic mass of each element on your periodic table.

Pb = 207.2 amu

O = 16 amu

H = 1 amu

They are two oxygen and two hydrogen atoms. Now add the atomic mass of all the elements together

207.2 + 16(2) + 1(2) = 241.2 grams

Now multiply 241.2 with the 1.75 moles

241.2 * 1.75 = 422.1

So the final answer is 422.1 grams.

Hope it helped!

Answer:

580

Explanation:

pmz make me brainliest

733 g CO₂

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Stoichiometry

Step 1: Define

[RxN - Balanced]   2C₃H₇OH + 9O₂ → 6CO₂ + 8H₂O

[Given]   5.55 mol C₃H₇OH

Step 2: Identify Conversions

[RxN] 2 mol C₃H₇OH → 6 CO₂

Molar Mass of C - 12.01 g/mol

Molar Mass of O - 16.00 g/mol

Molar Mass of CO₂ - 12.01 + 2(16.00) = 44.01 g/mol

Step 3: Stoichiometry

Step 4: Check

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

732.767 g CO₂ ≈ 733 g CO₂

Answer:

A) Oscillate

B) Liquid

C) Loosely

That is, "They can oscillate about a fixed point. Particles in a liquid are still close together but are arranged loosely (not in a pattern)

Explanation:

The above speaks to the various states that matter can be in. They are Gaseous, Liquid, and Solid.

The state described above is the liquid state. Recall that all matter are made up of microscopic particles. These particles when viewed under a microscope are observed to be in a state of continuous motion.

The degree of motion and arrangement is determined by the temprature of the substance. The higher the temperature, the faster and more lose the particles become.

Water for instance would in a liquid state, have its particles oscillate freely about each other giving it the ability to take the shape of the container in which it is put. Its particles are not rigidly fixed together at this point and can slide past each other easily.

In a solid-state (that is ice) the particles become tightly packed and there is less oscillation. Whilst in a gaseous state (vapor, that is) the particles o or molecules are very far apart.

Cheers!

Answer:

C.) Lactobacillus

Explanation:

Is a prokaryote with a simple rod shaped structure. Similar to other prokaryotic bacterium of its shape it has a cell wall, and capsule.

The molecular formula : Cl₂O₆

Given

Molecular mass = 166.9 g

The empirical formula = ClO₃

Required

The molecular formula

Solution

The empirical formula is the smallest comparison of atoms of compound forming elements.  

A molecular formula is a formula that shows the number of atomic elements that make up a compound.  

(empirical formula) n = molecular formula

(ClO₃)n=166.9

(35.5+3.16)n=166.9

(83.5)n=166.9

n=2

(ClO₃)2=Cl₂O₆

Answer:

a

Explanation:

Answer:

b

Explanation:

its not d bc no hypothesis was made

The concentration of solution : 0.2 M

Given

5.6 g Potassium hydroxide(KOH)

500 ml of solution = 0.5 L

Required

The concentration

Solution

Molarity shows the number of moles of solute in every 1 liter of solution or mmol in each ml of solution

MW KOH = 39+16+1=56 g/mol

mol solute(KOH) :

= mass : MW KOH

= 5.6 : 56 g/mol

= 0.1

Molarity :

= 0.1 : 0.5

= 0.2 M

Answer:

Noble gases are nonreactive, nonmetallic elements in group 18 of the periodic table. Noble gases are the least reactive of all elements. That's because they have eight valence electrons, which fill their outer energy level.

Elements: Argon

in the right side of the periodic table . It is group 18 called nobel gas or group This group has all element in stable form each has 8 electron in outermost orbit they are non reactive

Answer:

Adding water to an acid or base will change its pH. Water is mostly water molecules so adding water to an acid or base reduces the concentration of ions in the solution.  When an acidic solution is diluted with water the concentration of H+ ions decreases and the pH of the solution increases towards 7.  To make the pH change by 1, a tenfold dilution is required (eg adding 9 cm3 of water to 1 cm3 acid). The acid is becoming less acidic. Similarly, when an alkali is diluted with water the concentration of OH- ions decreases. This  causes the pH of the alkali to fall towards 7, making the solution less alkaline as more water is added.

Explanation:

Answer:

Temperature

Explanation:

K stands for Kelvin not Kilometers

Answer:

d) n = 5.4 mol

Explanation:

Given data:

Number of moles of He = ?

Volume of He gas = 120 L

Temperature and pressure = standard

Solution:

The given problem will be solve by using general gas equation,

PV = nRT

P= Pressure

V = volume

n = number of moles

R = general gas constant = 0.0821 atm.L/ mol.K  

T = temperature in kelvin

1 atm × 120 L = n × 0.0821 atm.L/ mol.K × 273.15 K

120 atm.L = n × 22.43  atm.L/ mol

n = 120 atm.L / 22.43  atm.L/ mol

n = 5.4 mol

Answer:

A. 1 mole of any element contains 6.02 x 10^23 atoms.

B. 1 mole of any compound contains 6.02 x 10^23 molecules.

Explanation:

:)

Taking into account the definition of Avogadro's Number, the correct answers are:

You have to know that Avogadro's Number or Avogadro's Constant is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023×10²³ particles per mole.

Avogadro's number represents a quantity without an associated physical dimension, so it is considered a pure number that allows describing a physical characteristic without an explicit dimension or unit of expression.

Avogadro's number applies to any substance, because the number of elementary units in a mole of substance is, by definition, a  constant that does not depend on the material or the type of particle considered.

So, in this case, the correct answers are:

Learn more about Avogadro's Number:

Answer:D

Explanation:I think

divide 5 hours 20 mins by 4,000

and ur answer is

320 mins/4000km

so

0.08

hope this helps

sorry if its wrong

Answer:

The conventional oven and the convection oven are confused with each other due to their similar look and style, and a lot of their functioning is quite the same as well.

The conventional ovens have existed for over half a century, and have derived their functioning from traditional ovens that are over 4,000 years. They function with a bottom-up heat transfer from a fixed burner source.

The convection ovens were made recently as a way to get better heating results for all types of dishes and recipes, with the introduction of a fan system along with an exhaust which allows the circulation of hot air around the cavity of the oven.

Explanation:

Answer:

last quarter moon/half moon

Explanation:

the only explanation would be that it is on top of a hotspot I don't know if this helps at all

Answer: how the air pressure is expect to change tonight AND the temp. for the previous week

Explanation:

a p e x

Answer:

Its helium

Explanation: Because teh effective nuclear charge holds the valence ectrons clos to the nuclues. the Atomic radius would decrease as you move from the led=ft and right of the perodic table

Answer:

3.4 mol H2SO4

Explanation:

Took the test

Answer:

One lone pair

Explanation:

If we follow the valence bond approach of looking at chemical bonding, then we have to consider the electronic configuration of Fe^3+ which is; [Ar] 3d5.

This means that we have three electrons available to combine with three fluorine atoms leaving one lone pair to form FeF3.

Hence, FeF3 has one lone pair of electrons.

Answer:

Newton's first law of motion states that an object in motion tends to stay in motion. This is what keeps the roller coaster rolling through the hills and turns after it accelerates down the initial ramp. Also, the riders inside the car will experience changes in accleration and apparent weight. The riders will keep going at the same speed in the same direction unless some other force (the seat) acts on them to change that speed or direction. At the bottom of hills, they try to continue downward, and are pressed into the seat. At the tops, the riders are lifted up in their seats as they try to continue upward even as the seat pulls them down into the next drop. The same thing occurs on turns, where riders are pushed into the side of the seat as the coaster turns. (This is the reason for harnesses, seat belts, and restraining bars.)

Explanation:

The chance of getting out moved from the seats is more in riders or on vehicles because, as stated by the first law of motion an object tends to stay in its state unless an external force acts on it. Thus, the ride will tend to move front even after stopped.

Inertia is the tendency  an object to continue  its state of motion  or rest until an external force act on it. This concept is explained by Newton's first law of motion.

This effect can be in many situations. For example in moving bus, when it is suddenly breaked, the travelers will move up front just because of the inertia of the bus. Similarly a stationary bus, when started will initially move back once.

The riders in amusement park will experience the same. Hence, there is a possibility of people moving out from the seat when it is stopping or starting that's why they have restraint bars.

To find more on inertia, refer here:

https://brainly.com/question/1358512

#SPJ5

Answer:

i don't really know but i think  it's 61 g

Explanation:

if im wrong i soooooooooooooooooooooooooooooooooooooooooooooooooooooooooo sorry

Answer:

Explanation:

jdiw9q9aidjejwjiq

Answer:

endothermic:instant cold pack,cooking egg,photosynthesis

exothermic:

Lighting a match.

A fireworks display.

Lighting coals on a barbeque.

Starting a gas oven.

Lighting firewood for a campfire.

Burning a piece of paper.