Answer :
Law of conservation of mass : It states that the mass of reactant molecules must be equal to the mass of product molecules.
The given unbalanced reaction is,[tex]Mg+HCl\rightarrow H_2+MgCl_2[/tex]
First we have to balance the chemical reaction.
The balanced chemical reaction is,[tex]Mg+2HCl\rightarrow H_2+MgCl_2[/tex]
Now we have to calculate the mass of reactant side molecules and product side molecules.
Mass of reactants = [tex]Mg+2HCl=(24)+2(1+35.5)=97g[/tex]
Mass of products = [tex]H_2+MgCl_2=2(1)+(24+2(35.5))=97g[/tex]
From this we conclude that the mass of reactant is equal to the mass of product.
Answer:
Law of conservation of mass do not apply to this equation.
Explanation:
The law of conservation of mass states that the mass of objects/element before any reaction must be equal to the mass of objects/element after the reaction.
Here in this case –
Mg+HCL->H2+MgCl2
Mass of Mg before reaction = 1
Mass of H before reaction = 1
Mass of Cl before reaction = 1
Mass of Mg after reaction = 1
Mass of H after reaction = 2
Mass of Cl after reaction = 2
Thus it is clear that mass of H and Cl before and after the reaction is not equal and thus law of conservation of mass do not apply to this equation.
explain how does air resistance affect acceleration and speed of an object?
what is the amplitude and wavelength of the wave shown below? A. Amplitude: 15 cm; wavelength: 150 cm B. Amplitude: 30 cm; wavelength: 150 cm C. Amplitude: 30 cm; wavelength: 200 cm D. Amplitude: 150 cm; wavelength: 30 cm
Answer: The amplitude is 15 cm and wavelength is 150 cm.
Explanation:
The wavelength is the distance between two consecutive compression.
The amplitude is the maximum displacement of the wave.
According to the figure,
This wave is longitudinal wave.
So, The amplitude is 15 cm approximate.
Now, the wave length will be
The wavelength is the distance between two consecutive compression is
[tex]\lambda=d_{2}-d_{1}[/tex]
[tex]\lambda= 150-0[/tex]
[tex]\lambda=150\ cm[/tex]
Hence, The amplitude is 15 cm and wavelength is 150 cm.
The amplitude here is 15 cm, where the wavelength is 150 cm.
What are amplitude and wavelength?The amplitude refers to the height that a wave has, which is measured from the peak of the wave to its lowest point.
Wavelength can be defined as the exact length of a wave from its peak to another peak point.Both amplitude and wavelength are measured as distance (here in centimeters).In conclusion, the amplitude here is 15 cm, where the wavelength is 150 cm.
Learn more about amplitude and wavelength here:
https://brainly.com/question/4303839
an airplane travels from St. Louis to Portland, Oregon in 4.33 hours. If the distance traveled is 2742 km what is the airplanes average speed?
A student practicing for a cross country meet runs 250 m in 30 s. What is her average speed?
When a student practicing for a cross country meet runs 250 m in 30 s, then her average speed would be 8.33 m/s.
What is speed?The total distance covered by any object per unit of time is known as speed. It depends only on the magnitude of the moving object.
The mathematical expression for speed is given by
speed = total distance /Total time
As given in the problem a student practicing for a cross country meet runs 250 m in 30 s,
Total distance covered by the student while running = 250 m
Time is taken by the student while running = 30 seconds,
Her average speed = 250/30
=8.33 m/s.
Thus. her average speed would be 8.33 m/s.
Learn more about speed from here, refer to the link;
brainly.com/question/7359669
#SPJ2
what is the volume of 325 g of metal with a density of 9.0 g/cm3
The volume of 325 g of metal with a density of 9.0 g/cm³ is 36.11cm³
HOW TO CALCULATE VOLUME:
The volume of a substance can be calculated by dividing the mass of the substance by its density as follows:Volume(mL) = mass(g) ÷ density (g/mL)
According to this question, the density of 325g of metal is given as 9.0 g/cm³, hence, the volume can be calculated as follows:Volume = 325g ÷ 9g/cm³
Volume = 36.11cm³
Therefore, the volume of 325 g of metal with a density of 9.0 g/cm³ is 36.11cm³
Learn more at: https://brainly.com/question/2058404?referrer=searchResults
A 5.0 kg rock is dropped from the top of a building. The speed of the rock after it has fallen for 2.2 seconds is?
Calculate the diffraction limit of the human eye, assuming a wide-open pupil so that your eye acts like a lens with diameter 0.8 centimeter, for visible light of 500-nanometer wavelength.
How does this compare to the diffraction limit of a 10-meter telescope?
How does energy move predictably between a lien water in the air above it
How would the seasons change if the earth were tilted at 90 degrees instead of 23.5?
What is the instantaneous speed at 5 seconds? (remember s=d/t)
1 m/s
25 m/s
5 m/s
15 m/s
Answer:
5 seconds is a poor time to ask about, because the speed abruptly changes at exactly 5 seconds.
Up until that time, the speed has been 1 m/s. And then, at exactly 5 seconds, it becomes zero.
_________
It's also a poor question because speed is calculated from the distance covered, but the graph shows displacement, not distance. You can't really tell the distance covered from a displacement graph. For example, if an object happens to be moving in a circle around the place where it started, then the total distance covered keeps increasing, but its displacement is constant.
Read more on Brainly.com - https://brainly.com/question/6618489#readmore
Explanation:
Choose all that apply. Solids, liquids, and gases can be distinguished by their:
molecular weight
shape
temperature
kinetic energy
mass
density
Solids, liquids, and gases can be distinguished by their shape, density, and kinetic energy, while molecular weight and mass remain consistent across the states of matter.
Solids, liquids, and gases, the three common phases of matter, can be distinguished by several properties. Solids have a definite shape and volume. Liquids have a definite volume but adapt to the shape of their containers. Gases, on the other hand, have neither a definite shape nor a specific volume, as they expand to fill their containers.
The characteristics that distinguish these states include:
Shape: Solids have a fixed shape, while liquids take the shape of their container and gases have no fixed shape.Density: Typically, solids are denser than liquids, which are in turn denser than gases, although there are exceptions when substances change phase.Kinetic Energy: Gases have the highest kinetic energy due to the fast movement of their molecules, while solids have the least.The properties that do not generally differ across the different states of matter include molecular weight and mass. A substance's mass or molecular weight remains consistent regardless of whether it is a solid, liquid, or gas.
As a car skids to a stop, friction transforms kinetic energy to...
The image shows the displacement of a motorboat. The data table shows the magnitudes of the components of each displacement vector.
What is the value of Rx?
km
What is the value of Ry?
km
[tex]R_x = A_x + B_x + C_x[/tex]
[tex]A_x[/tex] is negative as the vector is in third quadrant.
[tex]B_x[/tex] is positive as it points in the first quadrant.
[tex]C_x[/tex] is positive as it points in the fourth quadrant.
Hence,
[tex]R_x = -1.6 + 3.9 + 1.2[/tex]
[tex]R_x = 3.5[/tex] km
[tex]R_y = A_y + B_y + C_y[/tex]
[tex]A_y[/tex] is negative as it is in third quadrant.
[tex]B_y[/tex] is positive as it is in first quadrant.
[tex]C_y[/tex] is negative as it is in fourth quadrant.
[tex]R_y = -2.8 + 6.4 - 0.7[/tex]
[tex]R_y = 2.9[/tex] km
A student is trying to calculate the density of a can. He already knows the mass, but he needs to determine the volume as well. Which of the following formulas can be used to calculate the volume of the can?
To calculate the density of a can, the student must first determine its volume, which can be done using the formula for the volume of a cylinder V = πr²h or through displacement methods. Once the volume is known, density is calculated by dividing the mass by the volume.
Explanation:To calculate the density of a can, the student needs to determine its volume. The volume of a cylindrical can be calculated using the formula for the volume of a cylinder, which is π (pi) times the radius squared times the height (V = πr²h). The student already knows the mass of the can, so once the volume is calculated, density can be found by dividing the mass by the volume
The formula provided (D = m/V) can also be transformed to solve for volume, providing another formula: Volume (V) = Mass (m) divided by Density (D).
In cases where the volume needs to be found through displacement, the formula V = m/p (where p is the density) is used, such as determining the volume of a coin by the water displacement method.
A dancer lifts his partner above his head with an acceleration of 2.5 m/s2. The dancer exerts a force of 200 N. What is the mass of the partner?
A 5 N force pushes on the right side of a box. At the same time, a 10 N force pushes on the left side of the box. What happens to the box?
Answer: The box will displace towards right side.
Explanation:
In the given problem, a 5 N force pushes on the right side of a box. At the same time, a 10 N force pushes on the left side of the box. The net force acting on the force is 5 N.
The magnitude of the force acting on the box from the left side is more than the force acting on the box from the right side. The body will displace in that direction in which the magnitude of the applied force is more.
The box is displaced to right by a net force of 5 N.
Therefore, the box will displace towards right side.