Count the number of atoms in each formula. Type your answer in the box to the right of the formula.

1) AgNO2 =
2) 2Fe2O3 =
3) (NH4)3PO4 =
4) 3CaCl2 =

Answers

Answer 1

Answer:

1) 4

2) 8

3) 20

4) 5


Related Questions

What is thermal energy?
A- the average overall volume of a system
B-the total number of molecules in a system
C-the kinetic energy of particles in a system
D-the measure of temperature in a system

Answers

Answer:

D-the measure of temperature in a system

D- the measure of temperature in a system

ALL ABSURD ANSWERS WILL BE REPORTED AND REMOVED!

How much energy is needed to completely condense 205g of steam into liquid water?

Answers

Answer:

What is the amount of energy needed to change 20g of ice at 0°C to steam at 100°C?

A mattress you can fall back on.

Use the formula

q = m·ΔHf

where q = heat energy; m = mass; ΔHf = heat of fusion

q = (20 g)x(334 J/g)

q = 6680 J

Step 2: Heat required to raise the temperature of 0 °C water to 100 °C water

q = mcΔT

q = (20 g)x(4.18 J/g·°C)[(100 °C - 0 °C)]

q = (20 g)x(4.18 J/g·°C)x(100 °C)

q = 8360 J

Heat required to raise the temperature of 0 °C water to 100 °C water = 8360 J

Heat required to convert 100 °C water to 100 °C steam

q = m·ΔHv

where q = heat energy; m = mass; ΔHv = heat of vaporization

q = (20 g)x(2257 J/g)

q = 45140 J

Heat required to convert 100 °C water to 100 °C steam = 45140 J

Total energy required: 6680+8360+45140=60180 Joules

Or practically understanding it: about 20s in a 3000W kettle.

How many number of orbitals are in Potassium (K)?

1s^2 2s^2 2p^6 3s^2 3p^6 4s^1

Answers

Explanation:

Each orbital can only carry at most 2 electrons wih opposite spins.

The first 3 shells are fully filled, giving 9 orbitals.

There is an extra electron in 4s, which gives another orbital. (even though it is not filled yet)

Hence there are 10 orbitals.

1. Identify the flaw in the way Maria set up her experiment.
A. She did not take pictures.
B. She did not wait long enough.
C. She did not measure the temperature.
D. She did not mix the substances well enough.
2. Which of the following describes Maria making an observation?
A. Maria measured the compounds.
B. Maria let the test tube sit for one minute.
C. Maria wrote her results in her lab notebook.
D. Maria saw that bubbles formed on the metal in in mixture.

Answers

Answer:

c and d, because if maria did not measure the temperature then the experiment would not work and if you observe something that is some thing you see.

The energy released by an earthquake moves out from the earthquake's __________ in the form of seismic waves.

Answers

Answer:

The answer is Focus

The seismic waves are produced by an earthquake’s focus, which is the area in the Earth’s surface that experiences stress. These waves radiate energy that travels through the layers of the Earth.

A gas in a container has a pressure of 0.77 atm, volume of 65,5 L and a temperature of 235 K. If the gas
is helium, what mass of helium is in the container?
A) 2.61 g
B) 10.5 g
C) 0.625 g
D) 0.859 g

Answers

Answer:

B) 10.5

Explanation:

PV= NRT     -> N=PV/RT

N= mols .     P= pressure . V= volume in Liters    T= temp in Kelvin (Celsius degree = 273.15) .  R= Gas constant (.0821 for atm)

N=(.77 x 65.5)/(.0821x235) = 2.614 mols of Helium

Mols x Molecular weight = weight in grams

2.614x4.003(Molecular weight ot He) = 10.46 round to 10.5  

ASAP will give brainliest!!!
Which of the following solid substances contains positive ions immersed in a sea of mobile electrons?

Your answer:

O2

Cu

CuO

NO2

Answers

Answer:

For me

Explanation:

It's Cu because other compound contains negative radicals

Explain why you hear a “whoosh” sound when you open a can containing a carbonated drink. Which gas law applies?

Answers

Answer:

The carbon dioxide in the headspace above the liquid is at higher pressure than atmospheric pressure outside the can. ... The change in pressure as the gas rapidly moves to become dispersed through its new volume causes the "whoosh" sound. The gas law that applies is Boyle's law.

Explanation:

plzz mark as brainliest

how to separate water from aqueous magnesium sulphate?​

Answers

Answer:

The method generally involves heating a mixture of epsomite and halite to form clusters of lower hydrated magnesium sulfate crystals and subsequently applying slight pressure to the clusters so that they collapse to yield fine, less hydrated magnesium sulfate crystals which can then be easily separated from the ...

We have that This Separation is done by heating the Mixture to form magnesium sulfate crystals

Pressure is then applied to the magnesium sulfate crystals causing a collapse to give Reduced hydration of magnesium sulfate crystals

From the question we are told

How to separate water from aqueous magnesium sulphate?​

Generally

Water

the is a composition of hydrogen and Oxygen at a required  Proportion and it exists in gaseous state

aqueous magnesium sulfate

the is a composition of magnesium and Sulfur at a required Proportion and exists in aqueous

Therefore

This Separation is done by heating the Mixture to form magnesium sulfate crystals

Pressure is then applied to the magnesium sulfate crystals causing a collapse to give Reduced hydration of magnesium sulfate crystals.

For more information on this visit

https://brainly.com/question/1641336  

What are the half-reactions for a galvanic cell with Zn and Mg electrodes?

Answers

the half-reactions

cathode : Zn²⁺ (aq) + 2e⁻ ---> Zn (s)  

anode : Mg (s) → Mg²⁺ (aq) + 2e−

a balanced cell reaction

Zn²⁺(aq) + Mg(s)→ Zn(s) + Mg²⁺ (aq)

Further explanation

Given

Zn and Mg electrodes

Required

The half-reactions for a galvanic cell

Solution

To determine the reaction of a voltaic cell, we must determine the metal that serves as the anode and the metal that serves as the cathode.

To determine this, we can either know from the standard potential value of the cell or use the voltaic series

1. voltaic series

Li-K-Ba-Ca-Na-Mg-Al-Mn- (H2O) -Zn-Cr-Fe-Cd-Co-Ni-Sn-Pb- (H) -Cu-Hg-Ag-Pt-Au

The more to the left, the metal is more reactive (easily release electrons) and the stronger reducing agent

So the metal on the left will easily undergo oxidation and function as anode

Since Mg is located to the left of Zn, then Mg functions as anode and Zn as a cathode

2. Standard potentials cell of Mg and Zn metals :

Mg2+ + 2e– → Mg E° = -2,35 V

Zn2+ + 2e– → Zn E° = -0,78 V

The anode has a smaller E°, then Mg is the anode and Zn is the cathode.

Answer:

Explanation:help

What new evidence do you have to disprove the claim that some non-living things are made of cells? Explain your reasoning

Answers

Answer:

it is because non living things are not alive and it cannot be

Explanation:

because cells are the building thing of a living thing it is the most particular and simple reason but if you go deeper it consist of things called DNA which is a strips of protein that determines the info of a living things thats why if there is a reasoning that a nonliving things have cell its not.. thats all .

Gold has a density of 19.32 g/mL. If its mass is 56.94 grams what is its volume? (BE SURE TO SHOW ALL THREE PARTS:
EQUATION, WORK, AND PROPER FULL ANSWER.

Answers

Answer:

2.95 mL

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{56.94}{19.32} \\ = 2947204...[/tex]

We have the final answer as

2.95 mL

Hope this helps you

What is the electron configuration for the Magnesium ion?​

Answers

1s^2 2s^2 2p^6 for the Mg2+ ion.

Ions can be made by single element or covalently bonded group of elements. The covalently bonded group of elements is called polyatomic ions or polyatomic atoms. The electronic configuration of metal ion Mg²⁺ is 1s² 2s² 2p⁶.

What is Ions?

Any species that contain charge whether it is positive charge or negative charge is called ions. The example of polyatomic ions are sulfate, phosphate, nitrate etc.

Cation is the species that loose electron and attain positive charge while anion is a species which gain electron and attains negative charge so when anion and cation combine in fixed ration the the overall charge of the molecule is zero that is molecule is neutral, the charge over cation and anion is also called oxidation state.

The electronic configuration of Magnesium is 1s² 2s² 2p⁶3s². To make magnesium ion  Mg²⁺, we need to take out two electron from Magnesium.   The electronic configuration of metal ion Mg²⁺ is 1s² 2s² 2p⁶.

Therefore the electronic configuration of metal ion Mg²⁺ is 1s² 2s² 2p⁶.

To learn more about ions, here:

https://brainly.com/question/13692734

#SPJ2

15) The element X has three naturally occurring isotopes. The isotopic massed (amu) and % abundances of the isotopes are given in the table below. the average atomic mass of the element is _____ amu. ​

Answers

i am kobe's pioletdsdcddsdcdds sd s d  

Which process causes the greatest depletion of oxygen from the atmosphere?
Group of answer choices

weathering and oxidation

decay and bacteria

fossil fuel combustion

respiration of air breathing organisms

Answers

Fossil fuel combustion since one of the reactants is O2 and this reactions occurs in enormous quantities compared to aerobic respiration

Fossil fuel combustion causes the greatest depletion of oxygen from the atmosphere. Therefore, option C is correct.

When fossil fuels, such as coal, oil, and natural gas, are burned for energy production. The combustion process consumes oxygen from the atmosphere and produces carbon dioxide as a byproduct.

This combustion reaction is responsible for the largest contribution to the reduction of oxygen levels in the atmosphere, especially when considering the vast quantities of fossil fuels burned globally for various purposes like electricity generation, transportation, and industrial processes.

Learn more about fossil fuels, here:

https://brainly.com/question/2029072

#SPJ2

energy transfer by electromagnetic waves

Answers

Answer:

Radiation is the transfer of heat energy through space by electromagnetic radiation.

Explanation:

Radiation is the transfer of heat energy through space by electromagnetic radiation. Most of the electromagnetic radiation that comes to the earth from the sun is in the form of visible light. Light is made of waves of different frequencies.

All elements in a group will have the same number of protons true or false

Answers

Answer: False

Explanation: Elements have the same number of electrons in a group, especially valence electrons.

Hope this is correct

Fluorine belongs to group 17. How many covalent bonds are formed between two fluorine atoms?
Your answer:
1
2
3
4

Answers

Answer:

3??

Explanation:

hey??????????????

Answer: 1

Fluorine is in group 7, meaning that it has 7 valence shell electrons and to fulfill the octet rule it can only obtain 1 more electron.

When bonding the last lone pair for each of the two fluorine atoms together you create a total of two electrons shared between each.

Therefore you get a total of 8 valence shell electrons.

Remember: when you have 8 valence shell electrons you have obtained an octet

In other words...

8 valence shell electrons = satisfied octet rule


A beaker contains 20.0 ml of a 50.0 g/L solution. What will the new concentration be if you add 40.0 mL of water?

Answers

Answer:

moles SO42- = 0.0500 L x 0.20 M=0.010

moles Ba2+ = 0.0500 L x 0.10 M = 0.0050

Ba2+ + SO42- = BaSO4 (s)

moles SO42- in excess = 0.010 - 0.0050=0.0050

total volume = 100 mL = 0.100 L

[SO42-]= 0.0050/0.100= 0.050 M

[Na2SO4] = 2 /2 = 1 M

moles Na2SO4 = 2 M x 0.500 L = 0.500

mass Na2SO4 = 0.500 x 142 g/mol=71.0 g

moles MgBr2 = 46 /184 =0.25

moles Br- = 0.25 x 2 = 0.50

[Br-]= 0.50 / 0.50 L = 1 M

The boiling points, at standard pressure, of four compounds are given in the table below. Which type of attraction can be used to explain the unusually high boiling point of H2O?

Answers

Explanation:

Hydrogen bonding! Each hydrogen atom with a high charge density forms bonds with lone pairs on oxygen atoms. These bonds require a lot of energy to break giving water a relatively high boiling point.

Hydrogen bonding is the strongest forces of attraction between the molecule. Water has  unusually high boiling point because of hydrogen bonding.

What is boiling point?

Boiling point is the temperature at which a liquid's internal pressure equals the external pressure imposed by the liquid's vapour; in this situation, the addition of heat causes the liquid to turn into vapour without rising the temperature.

A liquid partially vaporizes into the space above it at any temperature up till the vapour the liquid's pressure at a certain temperature, which is a characteristic value. Water has  unusually high boiling point because of hydrogen bonding. Hydrogen bonding is the strongest forces of attraction between the molecule.

Therefore, Water has  unusually high boiling point because of hydrogen bonding.

To learn more about boiling point, here:

https://brainly.com/question/14771622

#SPJ6

How many miles are equal to 1.7 km (1 inch = 2.54 cm)

Answers

Answer:

1.056 miles are equal to 1.7km

The narrow layer of Earth where life-supporting conditions exist is called the

Answers

The narrow layer of Earth where life supporting conditions exist is called the Mantle

Answer:

The narrow layer of Earth where life-supporting conditions exist is called the biosphere.

if you put a rock in a rock in a graduated cylinder and the water went from 100 ml to 120ml, then how much space or volume did the rock take ?

Answers

Answer:

30 miles

Explanation:

How does a substances temperature change when the average kinetic energy of its particles increases ? When the average kinetic energy decreases ?

Answers

Answer:

The temperature of a substance when the average kinetic energy of its particles increases and decreases when the average kinetic energy decreases.

Explanation:

Atoms and molecules are in constant motion. Kinetic energy is a form of energy, known as energy of motion. Kinetic energy is a form of energy, known as energy of motion. The kinetic energy of an object is that which is produced due to its movements, which depends on its mass (m) and speed (v).

Temperature refers to a quantity used to measure the kinetic energy of a system. That is, temperature is defined as an indicator of the average kinetic energy of the particles in a body.

So, since temperature is a measure of the speed with which they move, the higher the temperature the faster they move.

Finally, the temperature of a substance when the average kinetic energy of its particles increases and decreases when the average kinetic energy decreases.

Given the following equation: 2 KClO₃ ➞ 2 KCl + 3 O₂, how many grams of O₂ can be produced by letting 5.00 moles of KClO₃ react? *
4 points
12.0 g of O₂
480 g of O₂
24.00 g of O₂
240 g of O₂

Answers

Answer:

240 g of O2

Explanation:

......................

Which reaction energy diagram below would be spontaneous? ​

Answers

Answer is D. Both I and III are spontaneous graphs because the change in G < 0.

when 5 moles of ion oxide react with 25 moles of carbon monoxide what is the moles of the product formed when one of the reagents is used in excess

Answers

Answer: 25 moles of product are formed.

Explanation:

The balanced chemical equation will be :

[tex]Fe_2O_3+3CO\rightarrow 2Fe+3CO_2[/tex]  

According to stoichiometry :

1 mole of [tex]Fe_2)_3[/tex] require = 3 moles of [tex]CO[/tex]

Thus 5 moles of [tex]Fe_2O_3[/tex] will require=[tex]\frac{3}{1}\times 5=15moles[/tex]  of [tex]CO[/tex]

Thus [tex]Fe_2O_3[/tex] is the limiting reagent as it limits the formation of product and [tex]CO[/tex] is the excess reagent.

As  4 moles of reactant give = 5 moles of product

Thus 20 moles of reactants will give =[tex]\frac{5}{4}\times 20=25moles[/tex] of products

URGENT URGENT URGENT pls help me with this !!!!

Answers

Answer:

B

Explanation:

Electron affinity decreases down the groups and left to right across periods. since selenium is below oxygen in the group, it has a lower affinity

Answer: B

The answer is B. Hope this helped you

How many moles of copper would be needed
to make 1 mole of Cu,O?

Answers

Answer:

You can view more details on each measurement unit: molecular weight of Copper(I) Oxide or grams The molecular formula for Copper(I) Oxide is Cu2O. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Copper(I) Oxide, or 143.0914 grams.

Explanation:

What kind of energy would a textbook lose if you dropped it off a building

Answers

The textbook would lose potential energy since its falling from a high height.

Answer:potential energy

Explanation:

Other Questions
.. / /my mind in school This refers to a person who follows the teaching of the prophet muhammad and the holy quran Brenda is considering renting a car for the weekend. The weekend daily rate is $29.99. If she planson picking up the car on Friday morning and returning it Sunday evening, what is her total rental cost?5. What name is given to the price dealerships pay for vehicles What is theatre definition? Write a linear function f with the given values.f(x)-4-2-2-100f(x) == Mark has a $100 gift card to buy apps for hissmartphone. Each week, he buys one newapp for $4.99 Theoretical Probability is? Alex wants to learn about dog care. Which source is most likely to have credible information for his report? CAN SOMEONE PLEASEEEE HELP ME WITH THIS SCIENCE QUESTION THANK YOU!! (Explain how you got the answer) DRM is a collection of techniques that control uses of intellectual property in digital formats and includes hardware and software using encryption. DRM stands for:________a. Dynamic Resource Management b. Digital Rights Management c. Digital Rights Material visible light transmitting through a certain medium.Because the light is scattered and an image cannot be clearly resolved, this medium is described as beingA . Translucent B. Fluid C. Opaque D. Transparent Mrs. Jones owns stock from which she received $3,000 in cash dividends. Mr. Jones owns stock from which he received $400 in cash dividends. How much of the cash dividends received are Mr. and Mrs. Jones liable for when filing their joint return? a headline sounds most credible when it Tristan has 24 apples. He eats 24 of them. His friend mike gives him 12 more. how many does he have left? 2. The picture depicts what stage of melosis?A metaphase 2B anaphase 1C metaphase 1D prophase 1 GUYS... HELP ME WITH THIS... Are the graphs of -5y = 2x + 3 and y = 2/5 x + 4 parallel, perpendicular, or neither? 100 points!!!! Please solve for real or be reported. Thank you u Nevia spent $0.75 on 1.5 pounds of bananas. At this rate, how much will 6 pounds of bananas cost?Record your answer on the grid. Be sure to use the correct place value. 0.600 moles of BF3 is how many molecules of BF3?