Answer:
Hey there!
22.0 has three significant figures.
Let me know if this helps :)
3. How many atoms are found in 5.20 g of magnesium (Mg)?
Explanation:
In order to go from mass of magnesium to atoms of magnesium, we have to do two things:
Convert mass of Mg to moles of Mg using the molar mass of Mg as a conversion factor
Convert moles of Mg to atoms of Mg using Avogadro's number (6.02×1023) as a conversion factor
Step 1:
Before we start, I should note that the molar mass of Mg is 24.31gmol. We can go from mass to moles using dimensional analysis. The key to dimensional analysis is understanding that the units that you don't need any more cancel out, leaving the units that are desired:
48.60g
×1mol24.31g
=2.00mol
Step 2:
We'll use this relationship:
www.sprinklernewz.uswww.sprinklernewz.us
Using the moles of Mg that we just obtained, we can use Avogrado's number to perform dimensional analysis in order to cancel out units of mol to end up with atoms of Mg:
2.00mol
×6.02×1023atoms1mol
=1.204×1024atoms
Thus, 48.60g of Mg is equivalent to 1.204×1024atoms
Hope this helped :)
What type of quantity is momentum
Answer:
Vector quantityExplanation:
Momentum is a vector quantity because it has both magnitude and direction
*
The state of matter with the highest energy and most movement is
Answer:
gas
Explanation:
Scientific models are always correct
✅Models are approximations and omit details, but a good model will robustly output the quantities it was developed for. Models do not always predict the future. This does not make them unscientific, but it makes them a target for science skeptics. ... But correct predictions alone don't make for a good scientific model
IamSugarBee
What is the relationship between volume and pressure for a gas?
Answer:
There exists a relationship between pressure and volume through Boyle's Law. It states that when temperature is held constant in thermodynamic syatems, the volume increases as the pressure decreases (and is true the other way around).
Hope this helps :)
What is the difference between physical and chemical properties? Give 3 examples of each.
Explanation:
1.A physical property is an aspect of matter that can be seen or measured without changing its chemical composition. Examples of physical properties include color, molecular weight, and volume.
A chemical property is observed only by changing the chemical identity of a substance. In other words, the only way to detect a chemical is to perform a chemical reaction.
2.This property measures the ability of chemical change. Examples of chemical properties are reactivity, flammability, and oxidation state.
The physical properties of a substance do not involve any chemical reaction. These include density, color, mass, hardness, freezing points, electrical properties, and the like.
Chemical properties include the reaction of chemicals with other substances. These reactions lead to the disappearance of the raw material and the appearance of new materials that have different physical and chemical properties.
3.Chemical properties can be compared to physical properties; On the contrary, they are recognizable without changing the structure of matter. However, for many properties in the field of physical chemistry and other disciplines at the boundary between chemistry and physics, the distinction can be a matter for the researcher's point of view. The properties of materials, both physical and chemical, can be seen as metaphysical; This means that it is secondary to the principle of tangible reality. Multiple metamorphic layers are also possible.
3. How does the size of the Kelvin and the Celsius degree compare? Explain.
1
Answer:
Lo más probable es que esté haciendo la conversión de Celsius a Kelvin
En ciencia, la unidad Kelvin se usa para medir la temperatura
La fórmula para Celsius a Kelvin es C + 273 = K
Explanation:
me das coronita
a sample of an unknown liquid has a volume of 24.0 mL and a mass of 6 g.what is its density?
Answer:
Density=mass / volume.
Density=6×24=144g/cm^3.
Answer:
0.25 g/mL
Explanation:
Density = mass/volume
Volume = 24.0 mL
Mass = 6 grams
Density = 6 grams/24.0 mL
Density = 0.25 grams/mL
A tuna travels at a speed of 72 kilometers per hour. What is the speed of the tuna in meters per second?
Answer:
20 m/s
Explanation:
Bob walks 81m East and then he walks 103m West.
The Answer your looking for is
He walked the distance of: = 184 m
a rate of change is it velocity or acceleration .
Answer:
Acceleration is the correct answer. Hope this helps!
Explanation:
Please someone explain the digestion reaction, what are the things needed for the reaction and what are the products or results? 10th grade chemistry
Answer:
Chemical digestion involves the secretions of enzymes throughout your digestive tract. These enzymes break the chemical bonds that hold food particles together. This allows food to be broken down into small, digestible parts. Digestion involves taking large portions of food and breaking them down into micronutrients small enough to be absorbed by cells. Chewing and peristalsis help with this, but they don’t make particles small enough. That’s where chemical digestion comes in.
Chemical digestion breaks down different nutrients, such as proteins, carbohydrates, and fats, into even smaller parts:
Fats break down into fatty acids and monoglycerides.
Nucleic acids break down into nucleotides.
Polysaccharides, or carbohydrate sugars, break down into monosaccharides.
Proteins break down into amino acids.
Explanation:
I hope this helps!
help pls i need help and i’m tired i took 15 test today-
Answer:
3
Explanation:
Lithium's atomic number is 3. it has 3 protons in its model
Which method of drawing hydrocarbons is the fastest to draw?
A. The structural model method
B. The Lewis structure method
C. The ball-and-stick method
D. The stick model method
Answer: The stick model method
Answer:
D. The stick model method
Explanation:
a study was done to find if different tire treads affect the breaking distance of a car what is the independent variable the dependent variable and the constant
Answer:
Independent variable: Different tyre treads
Dependent variable: Breaking distance
Constant: Same car
Explanation:
In an experiment, an independent variable is that variable which the experimenter controls or manipulates to effect an outcome. In this experiment, the tyre treads are changed to see if it would affect the breaking distance, hence, the DIFFERENT TYRE TREADS is the independent variable.
On the other hand, a dependent variable is the variable that responds to the manipulation of the independent variable. In other words, it is the outcome of the experiment. In this experiment, the BREAKING DISTANCE is the responding or dependent variable.
Constant or controlled variable is that variable that is kept constant or unchanged throughout the course of the experiment. The constant, if changed, will influence the result of the experiment. The constant in this experiment is the CAR since the same car (unchanged) was used for the experiment.
Name and describe the two types of observations. Please help!
Answer:
Quantitative and Qualitative :)
Explanation:
The diagram below shows students set-up for the preparation and collection of oxygen gas
X
Oxygen gas
Sodium
peroxide
(a) Name substance X used
(b) Write an equation to show the reaction of sodium peroxide with the substance named in 1
Answer:
iodine sodium preocide
Explanation:
hang hsudb
Physical science is the study of
A. How matter and energy interact
B. All answers are true
C.energy
D.matter
Answer:
b
Explanation:
Answer:
B
Explanation: All answers are true
what is the mass of this atom?
Answer:
[tex] \boxed{ \huge{ \boxed{ \sf{ \: 7}}}}[/tex]
Option C is the correct option
Explanation:
Proton = 3
Neutron = 4
To find : Atomic mass
Atomic mass is the total number of protons and neutrons present in an atom of an element.
So, Atomic mass = Proton + Neutron
= 3 + 4
= 7
Hope I helped!
Best regards! :D
What is the charge of 5protons 6 neutrons and 5 electrons
Answer:
In this case the mass number would be 11.
Explanation:
The mass number of an element is the sum of the protons and neutrons. The number of neutrons for a given element is the only number that can change and still have the identity of the element stay the same, (because the atomic number is the number of protons).
what is acid, base, salt?
Answer:Acid ,Base ,Salt
Explanation: An acid is defined as a substance whose water solution tastes sour, turns blue litmus red and neutralizes bases
A substance is called base if its aqueous solution tastes bitter, turns red litmus blue or neutralizes acids.
Salt is a neutral substance whose aqueous solution does not affect litmus.
Hope it will help u....
Label the heat curves with the correct phase changes
100°C
Temperature H20 (°C)
0°c
Vaporization
Melting
Condensation
Freezing
Answer:
tap to view photo
1.melting
2.freezing
3.vaporization
4.condensation
Which molecule is largest? hydrogen carbon dioxide ammonia maltose
Answer:
maltose
Explanation:
If we intend to determine the largest molecule, then we must look at the relative molecular mass of each molecule because the larger the molar mass, the larger the molecule.
Hydrogen =2 gmol-1
Carbon dioxide = 44 gmol-1
Ammonia = 17 gmol-1
Maltose= 342.3 g/mol
Hence maltose is the largest molecule among the options.
What is the best inference readers can make based on the claims in the advertisement?
Apex is the only reliable internet streaming service in the area.
Apex has more channels for the money than some other streaming services.
All other streaming services charge more per channel than Apex does.
Other streaming services offer less desirable channels than Apex.
Answer:
Apex has more channels for the money than some other streaming services.
Explanation:
Due to lack of info:
you can't infer that Apex is reliable
you can't infer that other services charge more PER CHANNEL
you can't infer that other services are less desirable
The only reasonable inference would be my answer and I got it right on ED2020
Answer:
Or in other words B
to make it more simple
Explanation:
how does anodising of aluminium metal is done
Answer:
Anodizing is an electrochemical process that converts the metal surface into a decorative, durable, corrosion-resistant, anodic oxide finish. ... Anodizing is accomplished by immersing the aluminum into an acid electrolyte bath and passing an electric current through the medium.
Answer:
Anodising is a process of forming a thick oxide layer of aluminium. Aluminium develops a thin oxide layer when exposed to air. This Aluminium oxide coat makes it resistant to further corrosion. The resistance can be improved further by making the oxide layer thicker. During anodising, a clean aluminium article is made the anode and is electrolysed with dilute sulphuric acid. The oxygen gas evolved at the anode reacts with aluminium to make a thicker protective oxide layer. This oxide layer can be dyed easily to give aluminium articles an attractive finish
ANALYZE Explain why the liquid in a thermometer expands as temperature increases.
How is this related to the kinetic energy of the particles that make up the liquid?
The liquid expands as its temperature increases like stated. This is the same as saying that it occupies more space as temperature increases. Therefore it 'uses up' more of the space inside the thermometer as the temperature increases. the relation with kinetic energy is through the kinetic energy being used as it flows and expands, because of the heat, and mercurys relationship with heat. sorry if that's off :/
The kinetic engery of molecules increase as you go from solid liquid gas true or false
Dua buah gaya masing-masing F1 = 10 N dan F2 = 5 N bekerja pada sebuah benda yang:
a. usaha yang dilakukan terletak pada suatu permukaan lantai. Jika benda berpindah
ke kanan sejauh 5 meter, tentukan masing-masing gaya !
b. usaha yang dilakukan bersama-sama!
Pertanyaan ini tidak ditulis dengan benar.
Pertanyaan Lengkap:
Duah buah gaya masing masing F1=10N dan F2=5N bekerja pada sebuah benda yang terletak pada suatu permukaan lantai. Jika benda berpindah ke kanan sejauh 5 meter,usaha yang dilakukan pada benda oleh kedua gaya tersebut adalah
Answer:
75 Nm or 75 Joules
Explanation:
Dari pertanyaan tersebut, kami telah diberikan parameter berikut:
F1 = 10N
F2 = 5N
D = 5 Meter.
Kita diminta untuk mencari atau menghitung usaha yang dilakukan pada benda oleh dua gaya.
Rumus kerja yang dilakukan pada suatu benda dengan dua gaya =
W = (F1 + F2) × D
Dimana D = Perpindahan benda
W = (10N + 5N) × 5m
W = 15N × 5m
W = 75Nm atau 75Joules
Oleh karena itu, usaha yang dilakukan pada benda tersebut dengan dua gaya = 75Nm atau 75 Joules
How does the number of protons affect the atom?
Protons are the subatomic particles which has positive charge.
The protons define the element.
So for example, every element that has 1 proton is hydrogen.
Hydrogen is a gas.
Every element that has 23 protons would be vanadium.
Vanadium is a chemical element with an atomic number 23.
Significant Figures - write the number of significant figures in the blank.
______ 1. 53
______ 2. 53.0
______ 3. 0.053
______ 4. 0.0503
______ 5. 530
______ 6. 530.
______ 7. 530.0
______ 8. 5030
______ 9. 5030.
______ 10. 5030.001
______ 11. 5-300.001