how many atoms are in 7.3 moles of arsenic atoms? 1 mol = 6.02 x 10^23 particles
Answer:
6,9
Explanation:
10 Look carefully at the picture. it shows an electron in the excited state on the left, and the
electron returning to its ground state on the right. When the electron return to the ground state it
emits
photon
excited state
ground state
a) blast of cold air
c) proton
b) electrostatic charge
d) photon (light)
A bathtub is half full of warm water. How could the
thermal energy of the water be increased? Check
all that apply.
Answer: A. B and C
Explanation:
I'm pretty sure this is right....
Have a great day :)
Answer: It is A,B. and C.= Add hot water to the tub.
Heat the water in the tub without adding more water.
Add more water at the same temperature to the tub.
Explanation: I got it correct.
True or False: Potential and kinetic energy are fixed and do not convert between the two types. *
10 points
Answer:
false
Explanation:
According to the law of conservation of energy, energy can neither be created nor destroyed but can be converted from one form to another. Hence, the given statement is true.
What is law of conservation of energy?According to law of conservation of energy, it is evident that energy is neither created nor destroyed rather it is restored at the end of a chemical reaction .
Law of conservation of mass and energy are related as mass and energy are directly proportional which is indicated by the equation E=mc².Concept of conservation of energy is widely used in field of chemistry, fluid dynamics.
Law needs to be modified in accordance with laws of quantum mechanics under the principle of mass and energy equivalence.This law was proposed by Julius Robert Mayer in the year 1842.
Learn more about law of conservation of energy,here:
https://brainly.com/question/12050604
#SPJ2
True/False: There are about 400 known elements
Answer: false
Explanation:
there are no more then 112 known elements.
Answer:
false
Explanation:
their are only 118 element
Does the following compound contain a polyatomic ion? Na2SO4
Yes
No
Tell me what you think in galaxies do aliens exist tell me why and your view
Step by step
Answer:
I do not know. I think there is .as we are the living creatures in this earth. maybe aliens are creatures of other planet or galaxies. I am not scientists to prove it.sorry.
HELP PLSSSSSS ASAPPPPP
If she traveled 10 m in 5 seconds, what was her average speed?
What unit is used to measure weight?
Answer:
The unit is: Newton.
Hope it helps:D
What are the cons of using a cup made of steel?
Answer:
1. Sometimes there’s a metallic taste to the water
2. The water becomes hot if left in your car or outdoors in hot weather
3. Bottle can dent if dropped
4. Paint sometimes peels off exterior of metal bottles
5. Metal water bottles lined with a resin lining also leach BPA. Do not get a bottle with what appears to be a “colored” lining of any kind.
Explanation:
Answer:
Steel feels cold, can dent, and is heavy. Sometimes it has a strange taste. Steel can also stain with use.
Explanation:
Hope this helps! :)
According to the Heisenberg uncertainty principle, it is impossible to know both the __ and __ of an electron simultaneously.
a. mass and charge
b. position and velocity
c. mass and position
d. velocity and charge
Answer:
C
Explanation:
It's simple because there were so many quantitative analysis of error and they didn't had the kind of observations as we have now
A teacher asks students to make a model of a transform plate boundary. The
students use blocks to represent tectonic plates and slide the blocks past each
other in the directions of the arrows as shown.
Transform Plate Boundary
Plate
Plate
Which event can the student best demonstrate with their model?
Answer:
C Earthquake
Explanation:
I just took this test and it’s on Quizizz
The event which best describes the model is an Earthquake. Earthquake is
formed when two plate boundaries collide with each other.
The plate boundaries colliding results in them being stuck. Pressure then
builds up between them which results in the plates breaking loose as time
goes on.
The movement that results from the plates breaking loose is what results in
an earthquake being experienced.
Read more on https://brainly.com/question/20409140
Can someone help me please. This is the last day
Answer:
atomic nucleus :)
Explanation:
If Jorge wanted to measure the distance between the Sun and the closest star to it, which unit should he use? no guessing
kilometer
meter
astronomical unit
light year
Answer:
i think kilometer or light year
Explanation:
Help please!!! How many grams are in 3.46 moles of Sulfur?
Answer:
The answer is: 78.04454 grams
Explanation:
Answer:
IHi the answer is 32.065 grams
Which state or states of matter have fixed volume but not a fixed shape?
Answer:
gas and liquid
Explanation:
kind of protists can live in groups with different individuals performing different jobs (site 1)
Answer:
The plasmodial slime molds are the kind of protist that can live in groups in which different individuals perform different jobs. Some kinds of bacterial cell walls also have other functions.
Please help (: What are the sources and stages of a river ?
Water, ALSO if you cant figure out the answer looking up on g00gl3e
3 Stages of a River
YOUTHFUL STAGE (UPPER COURSE) – V- Shaped Valley > Erosion. ...
MATURE STAGE (MIDDLE COURSE) – Meanders > Erosion and Deposition.
OLD AGE STAGE (LOWER COURSE) – Floodplains > Deposition. ...
Advantages. Scenic Attraction. ...
Dangers. Flooding – Damage to property, land, animals and homes. ...
The equation below shows a reaction that is second order in A and first order in B.
2A(9) +B(g) → C(g)
What is the rate law for the reaction?
HELPPP
i’ll give brainly :)))
Answer:
12. 2.9 g= 0.0029 13. 14.7 L = 14700 ml
14. The chemical formula of magnesium hydroxide is Mg(OH)2, and its molar mass is 58.32 g/mol.
Explanation:
What should the range for "Light Intensity" be?
A.0-18-0-18%
B.24-51% 24-51%
C.79-90% 79-90%
D.100%
The original phase and final phase of a substance are shown. Phase Transition Original Phase Final Phase Solid Liquid What most likely happened during the phase transition?
Answer:
The question appears to speak to the process between Liquid and Solid phases of a substance and seeks to resolve what happened in between.
The short answer is that the solid melted.
Explanation:
Melting is the process of a solid becoming fluid. When the reverse happens, (that is a liquid being solid), is called solidification. There is a temperature at which substances take their liquid form. That temperature is called the melting point. The melting point of ice (that is the temperature at which it starts to turn back to water) for instance is 32 °F.
According to the mechanics of melting, the internal energy of the solid increases, because of exposure to heat and or pressure usually through the application of heat or pressure, which increases the substance's temperature to the melting point.
Cheers
Answer:
Explanation:
the other guy who answered must be retded cause melting isnt even a choice.
Correct Option the substance froze.
You are working a crime scene and discover a weapon. How do you pick up the weapon so you do not disturb
any latent fingerprints?
Answer:
you pick it up with gloves and make minimal contact with it
Describe what causes the airbag to inflate on the particle level
Answer:
The chemical at the heart of the air bag reaction is called sodium azide, or NaN3. CRASHES trip sensors in cars that send an electric signal to an ignitor. The heat generated causes sodium azide to decompose into sodium metal and nitrogen gas, which inflates the car's air bags
Explanation:
MULTIPLE CHOICE QUESTION
What are the stomata (singular: stoma)?
The part of the plant that takes in sunlight.
The powerhouse of the cell.
Small holes in the leaf that let air in and out.
HELP ME
Answer:
3:small holes that let air in and out
Help asap.
How many moles are 5.55x10^25 atoms of Mg
Answer:
[tex]\boxed {\boxed {\sf About \ 92.2 \ moles \ of \ Magnesium}}[/tex]
Explanation:
To convert from atoms to moles, we must Avogadro's number:
6.022*10²³This number tells us the amount of particles (atoms, molecules, etc.) in 1 mole of a substance. In this case, it is atoms of magnesium in 1 mole.
6.022 *10²³ atoms Mg / 1 mol mgNow, let's set up an expression using:
[tex]\frac {6.022 * 10^ {23} \ atoms \ Mg}{ 1 \ mol \ Mg}[/tex]
Multiply this by the given number of atoms.
[tex]5.55*10^{25} \ atoms \ Mg *\frac {6.022 * 10^ {23} \ atoms \ Mg}{ 1 \ mol \ Mg}[/tex]
Flip the fraction so the atoms of magnesium can cancel.
[tex]5.55*10^{25} \ atoms \ Mg *\frac { 1 \ mol \ Mg }{6.022 * 10^ {23} \ atoms \ Mg}[/tex]
[tex]5.55*10^{25} *\frac { 1 \ mol \ Mg }{6.022 * 10^ {23}}[/tex]
Multiply and condense this into 1 fraction.
[tex]\frac { 5.55*10^{25} \ mol \ Mg }{6.022 * 10^ {23}}[/tex]
[tex]92.1620724 \ mol \ Mg[/tex]
The original measurement had 3 significant figures, so our answer must have that many as well. For the number we calculated, that is the tenth place. The 6 in the hundredth place tells us to round the 1 to a 2.
[tex]92.2 \ mol \ Mg[/tex]
It is about 92.2 moles of magnesium.
PLEASEEE HELP ASAPPPPP

Answer: answer A
Explanation: because it gives more detail and a summarizations
I’ll give brainliest, pls help with this mole concept. Due in 2hours
Answer:
20 g of copper (II) oxide, CuO
Explanation:
The balanced equation for the reaction is given below:
CuO + 2HCl —> CuCl₂ + H₂O
From the balanced equation above,
1 mole of CuO reacted to produce 1 mole of CuCl₂.
Next, we shall determine the number of mole of CuO needed to produce 0.25 mole of CuCl₂. This can be obtained as follow:
From the balanced equation above,
1 mole of CuO reacted to produce 1 mole of CuCl₂.
Therefore, 0.25 mole of CuO will also react to produce 0.25 mole of CuCl₂.
Finally, we shall determine the mass of 0.25 mole of CuO. This can be obtained as follow:
Mole of CuO = 0.25 mole
Molar mass of CuO = 64 + 16
= 80 g/mol
Mass of CuO =?
Mole = mass /Molar mass
0.25 = mass of CuO /80
Cross multiply
Mass of CuO = 0.25 × 80
Mass of CuO = 20 g
Therefore, 20 g of copper (II) oxide, CuO is needed for the reaction.
I need chemical properties of matter that can be classified.
Answer:
Matter can be broken down into two categories: pure substances and mixtures. Pure substances are further broken down into elements and compounds. Mixtures are physically combined structures that can be separated into their original components. A chemical substance is composed of one type of atom or molecule.
Explanation: if this isnt want you need tell me in the comments
