7. How many moles 02 can be produced from 4.3 moles of N205 in the reaction
2N205(g) ---> 4NO2(g) + O2(g) mole ratio is 1mole 02/ 2 moles N205
A. 2.2 mol
B. 8.6 mols
C. 17.2 moles
D. 1.2 mol

Answer:

A) 2.2 mol

Explanation:

Given data:

Number of moles of O₂ produced = ?

Number of moles of N₂O₅ decomposed = 4.3 mol

Solution:

Chemical equation:

2N₂O₅    →   4NO₂ + O₂

Now we will compare the moles of N₂O₅ and O₂.

            N₂O₅       :        O₂

             2            :         1

            4.3         :       1/2×4.3 = ×2.2

Thus, from 4.3 moles of  N₂O₅ 2.2 moles of O₂ are produced.

(7th grade science question)

In baking and science, do you think it is better to measure loose solids (like flour or sugar) by volume or mass? Why?​

What is the formula for flow rate?

ILL MARK AS BRAINLESS PLS HELP

what are ions and how do they work please send me answer​

Car 1 has a body made from aluminium and car 2 has a body made from steel. Which car is likely to
have the better fuel economy?​

BRAINLIST!!


A river flowing through a floodplain shapes the region through the processes of weathering, erosion, and deposition. Which of the following is an example of the river forming a depositional feature?

A.
As the water's speed increases, it scours deep grooves in the muddy river bottom.
B.
As the water flows along the outside edge of a curve, it removes rock and soil from the river bank.
C.
As the water's speed decreases along the inside edge of a curve, sediment is laid down to form a point bar.
D.
all of these

1. Electronegativities of the elements Be, Mg, Ca, and Sr follow a specific trend within their group. Based on this trend, the atoms of which element will have the least attraction for an electron?
A) Be.
B) Mg.
C) Ca.
D) Sr.

2. Which element has a larger atomic radius than sulfur?
A) Chlorine.
B) Cadmium.
C) Fluorine.
D) Oxygen.

3. Which ion was formed by providing the second ionization energy to remove an electron?
A) Ca2+.
B) N3–.
C) Fe3+.
D) S2–.

4. The most negative electron affinity is most likely associated with which type of atoms?
A) Large nonmetal atoms.
B) Small nonmetal atoms.
C) Large metal atoms.
D) Small metal atoms.

5. Selected properties of antimony (Sb) and iodine (I) are listed in the table below.

Element AtomRadius(pm) 1st IonEnergy(kJ/mol) ElectroAffinity(kJ/mol) Electronegative
Sb 145 ? –103 2.05
I 140 1008 –295 ?

Which predictions can most likely be made?
Sb has a lower ionization energy but a higher electronegativity than I.
Sb has a higher ionization energy but a lower electronegativity than I.
Sb has a lower ionization energy and a lower electronegativity than I.
Sb has a higher ionization energy and a higher electronegativity than I.

6. Which correctly summarizes the trend in electron affinity?
A) It tends to be very high for group 2.
B) It tends to be more negative across a period.
C) It tends to remain the same across periods.
D) It tends to be more negative down a group.

7. Which explains the change in ionization energy that occurs between removing the first and second electrons from an atom?
A) The ionization energy decreases because the ratio of the protons to electrons increases.
B) The ionization energy increases because the ratio of the protons to electrons increases.
C) The ionization energy decreases because the ratio of the protons to electrons decreases.
D) The ionization energy increases because the ratio of the protons to electrons decreases.

8. Which element would most likely have an electron affinity measuring closest to zero?
A) Na.
B) Al.
C) Rb.
D) Ar.

9. Electronegativities of the elements Na, Al, P, and Cl follow a specific trend across the period. Based on this trend, an electron will be most strongly attracted to
A) Na.
B) Al.
C) P.
D) Cl.

10. Which best describes ionization energy?
A) Energy needed to add an electron to a neutral atom in the gas phase.
B) Energy needed to add an electron to a neutral atom in the liquid phase.
C) Energy needed to remove an electron from an atom or ion in the gas phase.
D) Energy needed to remove an electron from an atom or ion in the liquid phase.

9 of 16
9.
A student drops a ball from 5 feet above the ground. After bouncing once, it only reaches
a maximum height of 4 feet above the ground.
Use energy terms to explain why the ball did not reach its original height after bouncing
once.
A. Some energy was lost
B. Some energy was transferred to the floor and air
C. Some energy disappeared when it hit the floor
D. Some energy was destroyed

Which of the following materials has the highest density?
A. O water vapor
B. O steam
C. O liquid water
D. O ice

Which of the following statements is true? Chemical reactions are the same as atomic reactions. The sun uses nuclear fusion reactions to generate heat. Nuclear power can't be used to do beneficial work. Nuclear fission is more dangerous than nuclear fusion.

Do you think that it is necessary and/or important to take a multivitamin everyday to maintain optimal health? What might help you answer this question? What types of things might influence your decision to take a multivitamin every day?
What's ur opinion with explanation???????!!!!!!!!!!

9

A 75 gram sample of water is initially at 30 degrees Celsius. What would it's temperature be if
it absorbed 2000 J of heat?

1. If a cell has waste it needs to store, it will store it:​

If the density is 0.9g/cm3 and the volume is 1.5cm3 ? What is the Mass?

2. You have 200g or a solution that contains 30g of hydrochloric acid (HCI),
what percentage of your solution is made up of HCI acid?​

The pedigree diagram shows how a dominant trait is inherited in a family. The red circle and squares show family members with the trait. Based on the pedigree diagram, who must be heterozygous for the trait? A. The child with the trait B. The child without the trait C. Only one parent D. Both parents​

1. OBJECT A HAS A TEMPERATURE OF 78K AND OBJECT B HAS A
TEMPERATURE OF 125K. HOW DOES HEAT FLOW? What happens to the
temperature of each object?

The specific heat capacity of copper is 0.385 J/(gK). If 353 J of heat are added to 3.6 moles of copper at 283 K, what is the final temperature of the sample of copper?

2. In the space below, describe why it rains. Include the words that scientists use
when talking about how water changes from liquid to gas and back to liquid
again

What is the name for this? Please help !!!!!!

What is the percent composition of Diphosphorus pentachloride? Round your answers to the hundredths place.

PLs help mweee Ill mark brainliest

Two siblings express different eye colors. The brother has brown eyes but the sister has blue eyes. Which statement explains why the siblings express different eye color? *
The brother received genes only from his father, and the sister received genes only from her mother.
The siblings each received a different combination of genetic information from their parents.
The brother received fewer genes from his other than his sister received.

Atoms of which two elements have a combined total of 23 protons?
A.Sodium, Na, and magnesium, Mg
B.Boron, B, and carbon, C
C.Copper, Cu, and zinc, Zn
D.None of these

A compound has a percent composition of 24.74% potassium (molar mass = 39.10 g/mol), 34.76% manganese (molar mass = 54.94 g/mol), and 40.50% oxygen (molar mass = 16.00 g/mol).

Assuming that the mass of the compound is 100 g, what is the compound’s empirical formula?

if you could add an explanation that would be nice too :) thanks

What is the yearly exposure from wearing a watch with a luminous dial?

i need help please this is due today

с
e reader.savvasrealize.com
60.5% + 39.7% = 100%
A compound is formed when 9.03 g
Mg combines completely with 3.48 g
N. What is the percent composition
of this compound?

An atom has 9 protons and 7 electrons. What is its overall charge?