Iron (Fe) reacts
with oxygen gas (O2) to form rust (Fe2O3). Balance the equation below
by writing in the coefficients to ensure that the same number of each
kind of atom appears on both sides of the equation.

Answer:

C

Explanation:

A year is a complete revolution around the Earth

Answer:

The answer is D

Explanation:

Explanation:

Load=500N

Effort=100N

Now,

We have,

Mechanical advantage= Load / effort

= 500/100

=5

Therefore, mechanical advantage is 5.

Answer: 2nd option

Explanation: took the quizz

Answer:

The atomic mass is 101.

Explanation:

Protons and neutrons are the only particles that contribute to mass. Electrons do have a mass, but it's so miniscule and insignificant that it doesn't contribute to the mass of an atom. In every instance of calculating atomic mass, add the number of protons to the number of neutrons.

Therefore,

44 + 57 = 101

number of protons + number of neutrons = atomic mass

Also, there can never be a negative amount of protons or neutrons, so if you get a negative number, there's something wrong.

Bonus Information:

Don't confuse mass with charge! As it says in its name, neutrons are neutral or have no charge. Protons (+) and electrons (-) are the only particles that have a charge, so calculating that would be different.

If you were calculating the atomic charge with the same numbers, your answer would be:

44 - 42 = 2

Charge = +2

What To Remember:

M = p + n

C = p - e

C = atomic charge, M = atomic mass, p =protons, n = neutrons, e = electrons

I hope this helps!

Answer:

D. Ionic

Explanation:

It has ionic bonding! Good luck ^^

Answer:

Earths rotation

Explanation:

Answer:

because if there was not four diferent season we would not have a day or a night because we would not be moving

Explanation:

Answer:

15 atoms

increases

Explanation:

10 hydrogen atoms + 5 oxygen atoms = 15 atoms

Answer:

0.0625

Explanation:

Answer:

62,500

Explanation:

Answer:

Awnser: D,Newtons second law of motion

Answer:

D) They wanted to remain part of Britain

Explanation:

i took the test lol

Answer:

D

Explanation:

Answer: is C&A

Explanation:the electric motor converts  electricity in to mechanical energy

the  electric generator converts mechanical energy to electricity so it could not be D.

and they don't use batteries as their main source of power so it could not be B.

hence forth it is C&A

HOPE THIS HELPS!!!!!!1

PLEASE MARK BRAINLIEST!!

The average atomic mass of a sample closer to the mass of Li-6

Isotopes are atoms whose no-atom has the same number of protons while still having a different number of neutrons.  

So Isotopes are elements that have the same Atomic Number (Proton)  

Atomic mass is the average atomic mass of all its isotopes  

In determining the mass of an atom, as a standard is the mass of 1 carbon-12 atom whose mass is 12 amu  

Mass atom X = mass isotope 1 . % + mass isotope 2.%  

three Li-6, mass number = 6

two Li-7, mass number = 7

total abundance = 5

abundance for Li-6 =

[tex]\tt \dfrac{3}{5}\times 100\5=60\%[/tex]

abundance for Li-7 =

[tex]\tt \dfrac{2}{5}\times 100\5=40\%[/tex]

Average atomic mass :

[tex]\tt (0.6\times 6)+(0.4\times 7)=6.4[/tex]

Answer:Burning marshmellows over fire

Explanation:

Answer:

yes the cell membranes are semi permeable

Answer:

The nucleus of the atom contains two subatomic particles, the protons which are positively (+) charged and the neutrons which are neutral (no charge).

Explanation:

Answer: Comparing rock layers in distant places can be a challenge for geologists since these layers may have different environmental factors that caused different transformations in them.

Therefore, when it is necessary to establish a comparison between layers of rocks in different ligands, geologists must establish steps to make an efficient comparison and have results consistent with reality. To do this, they must first compare a layer in one location with layers in other locations, assign relative age to a layer in one location, and identify index fossils in one or more layers in one location.

Answer:

C

Explanation:

I hate virtual school

The polyatomic ions are those ions which has more than two atoms involved such as the other options than OH^-1 in the question. The OH^-1 ion is the diatomic ion because it has only 2 atoms

Answer:

The nucleus is a collection of particles called protons, which are positively charged, and neutrons, which are electrically neutral.

Explanation:

Answer:

the person above me is right

hope you do good on your test

Explanation:

The volume of H₂ evolved at NTP=0.336 L

Reaction

Decomposition of NH₃

2NH₃ ⇒ N₂ + 3H₂

conservation mass : mass reactants=mass product

0.28 NH₃= 0.25 N₂ + 0.03 H₂

2 g H₂ = 22.4 L

so for 0.03 g :

[tex]\tt \dfrac{0.03}{2}\times 22.4=0.336[/tex]

Answer:

2 meters equal 200 centimeters

Explanation:

1 meter is equal to 100 centimeters.

Hope this helped, have a good day!

For a fence is 2 meters feet tall, the fence is 183.92 centimeters tall.

There are 0.3048 meters in 1 foot. So, a 2 meters fence is equal to 2 x 0.3048 = 0.6096 feet tall.

To convert feet to centimeters, multiply the number of feet by 30.48. So, a 0.6096 feet fence is equal to 0.6096 x 30.48 = 183.92 centimeters tall.

Therefore, the fence is 183.92 centimeters tall.

Feet to centimeters:

1 feet = 30.48 centimeters

0.6096 feet × 30.48 centimeters/feet

= 183.92 centimeters

Find out more on centimeters here: https://brainly.com/question/21386205

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Answer:

entropy

Explanation:

Answer:

N, P, As, Sb

Explanation:

Elements present in the same group having same number of valence electrons. The first option is correct from given options because nitrogen, phosphorus, arsenic and antimony are present in same group thus having same number of electrons in outer most  energy level.

Electronic configuration of N:

N₇: [He] 2s² 2p³

Electronic configuration of P:

P₁₅: [Ne] 3s² 3p³

Electronic configuration As:

As₃₃: [Ar] 3d¹⁰ 4s² 4p³

Electronic configuration Sb:

Sb₅₁: [Kr] 4d¹⁰ 5s² 5p³

Here it is clear from electronic configuration all these elements have five number of valence electrons.

Answer:

Explanation:  15

Answer:

Both types of waves transfer energy

Explanation:

I think that's right

Electromagnetic waves and sound waves  both types of waves can transfer energy.

The electromagnetic radiation consists of waves made up of electromagnetic field which are capable of propogating through space and carry the radiant electromagnetic energy.

The radiation are composed of electromagnetic waves which are synchronized oscillations of electric and magnetic fields . They are created due to change which is periodic in electric as well as magnetic fields.

In vacuum ,all the electromagnetic waves travel at the same speed that is with the speed of air.The position of an electromagnetic wave in an electromagnetic spectrum is characterized by it's frequency or wavelength.They are emitted by electrically charged particles which undergo acceleration and subsequently interact with other charged particles.

Learn more about electromagnetic waves,here:

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Answer: The same effect happens when you put two electrons near each other (or two protons). We know that if you have a single positively charged particle, a positively .

Explanation: i hope that helped. have a good day.

Answer: Na has a ground-state electronic configuration of 1s2 2s2 2p6 3s1. Removing the 3s electron leaves us with the noble gas configuration 1s2  so a sodium ion is Na+.

Explanation: I HOPE THAT HELPED!