Answer:
Density = (3.33kg or g)/cm³(since you didn't state the unit of the mass)
Explanation:
volume = length × breath × height
let's take it as,
length = 2.0cm
breath = 3.0 cm
height = 2.0 cm
mass = 40 kg or g (since you didn't state the unit of the mass)
volume = ?
volume = length × breath × height
volume = (2 × 3 × 2)cm
volume = 12 cm³
Density = mass /volume
40kg or g/12cm³
Density = (3.33kg or g)/cm³(since you didn't state the unit of the mass)
Suppose a deep sea diver dives from the surface to 81 feet below the surface. He then dives down 13 more feet.
Find and interpret the sum to describe the diver's present depth.
Answer:
-94 feet.
Explanation:
The number of which type of particle determines the identity of an element?
Answer:
Protons give the atomic number
Explanation:
Which interaction produces dispersive forces by creating temporary dipoles that induce dipoles in other molecules?
a. dipole-dipole
b. hydrogen bonds
c. dipole-induced dipole
d. induced dipole-induced dipole
Answer:
The answer is d. induced dipole-induced dipole
Explanation:
I did the test.
Answer:
D: induced dipole-induced dipole
Explanation:
What subatomic particles are found in the nucleus and in the electron cloud
Answer:
Electrons
Explanation:
What is the wavelength of a radio wave with a frequency of 3.1 X 106 Hz?
Answer:
Assuming that the frequency of a wave is 3 multiplied to 109 Hertz, then we use wave velocity over frequency. Therefore, 327 Hertz has a wavelength of approximately 917 kilometers and has a velocity of at least 300,000 kilometers per second
Explanation:
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Cases of smallpox were very rare worldwide by 1980. Which most likely explains this? A. an increase in disease education B. a decrease in world travel C. an increase in number of vaccinations of young children D. a decrease in regulations on food preparation
Answer:
C.
Explanation:
The main reason for this decrease is an increase in the number of vaccinations of young children. The smallpox vaccine which was created in 1796 completely allows individuals to easily and quickly fight off the smallpox disease if they were to get it. By being able to fight the disease quickly and effectively it provides less time for the disease to affect another individual. Therefore, causing cases to decrease and become very rare as time goes on.
How many moles of zinc are in 12.044 X 10^26 zinc atoms
Explanation:
Explanation:
The problem basically wants you to find a way to convert between the number of atoms present in the sample and the number of moles they are equivalent to.
To convert between atoms and moles we use something called Avogadro's constant, which basically acts as the definition of a mole.
More specifically, in order to have one mole of an element you need 6.022⋅1023 atoms of that element. You can thus use this number as a conversion factor to take you from atoms to moles or vice versa.
In your case, you will have
How subduction cause the formation of land mass like mountains and
volcano?
Answer:
Tectonic plates can crash into each other, and soil and dirt will shoot up, creating mountains and volcanos. This is how the Himalayas are actually said to form, when India crashed into Eurasia.
Hope this helps!
Which of the following is the correct name for N2S5?
1. A student in lab measures 4.6 grams of copper for an experiment. Upon further analysis he determines that he should have measured out 4.7 grams of copper. What is his percent error?
Answer:
[tex]2.13\%[/tex]
Explanation:
Quantity of copper measured by a student = 4.6 grams
Original quantity of copper = 4.7 grams
Error in measurement = Original quantity of copper - Quantity of copper measured by a student [tex]=4.7-4.6=0.1[/tex] grams
To find the percent error, apply the following formula:
Percent error = (Error in measurement / Original quantity of copper) × 100
[tex]=\frac{0.1}{4.7}(100)=2.13\%[/tex]
Significant figures are the digits within the number that help determine
accuracy.
о
True
о
False
Answer:false
Explanation:
What does the chemical formula CaCl, show about the compound it represents
Expressed to the correct number of significant figures, what is the correct sum of (3.04g + 4.134g + 6.1g)?
Answer:
13.3g
Explanation:
3.04g + 4.134g + 6.1g = 13.274g
=13.3g
When expressing the correct number of significant figures in addition, you go to the last common decimal place. In this case that is 0.1 because all the numbers have this decimal place.
This is because your measurement can only be as precise as the least precise measurement. The more decimal places in the measurement, the more precise the measurement.
Look at the periodic table, Gold, Silver, Sodium, and Aluminum are all what type of element?
Answer:
They are all in Group 11.
Explanation:
Look at the periodic table!
The elements gold, silver, sodium, aluminum are all metals. Gold and silver is transition metals. Sodium is in s block and aluminum is a p block elements in periodic table.
What are metals?Metals are electropositive elements able to conduct electricity and because of the presence of a pool of free electrons.
Metallic elements forms ionic bonds with non-metals. Gold and silver are transition metals or d-block elements. They are highly conducting and silver is a common component in electrical devises.
Aluminum is a p-block element it is in 13th group and sodium is a first group element and is called as an alkali metal. Hence, all the given elements are metals.
To learn more about metals, refer the link below:
https://brainly.com/question/4701542
#SPJ2
A teacher puts two tablets in a glass of water. The teacher
stirs the water with a spoon until the tablets start to bubble.
Which of the following is LESS dense than water?
This question is incomplete because the options are missing; here are the options:
Which of the following is LESS dense than water?
The spoon
The glass
The tablets
The bubbles
The correct answer to this question is The bubbles
Explanation:
In general, the density of materials and substances affects their buoyancy. This implies in water less dense materials will float and those with higher density will sink. In the situation presented, the only element that is less dense than water are bubbles; this is shown by the movement of the bubbles as these originate in the bottom of the glass of water but they rise to the surface, which shows they are less dense than water.
Answer:
the bubbles
Explanation:
True or False: Clouds form when one condensation nucleus expands outward.
Answer:
False
Explanation:
Clouds are formed when air contains as much water vapor (gas) as it can hold. This is called the saturation point, and it can be reached in two ways. First, moisture accumulates until it reaches the maximum amount the volume of air can hold. The other method reduces the temperature of the moisture filled air, which in turn lowers the amount of moisture it can contain. Saturation, therefore, is reached through evaporation and condensation, respectively. When saturation occurs, moisture becomes visible water droplets in the form of fog and clouds.
Which processes contribute to the formation of chemical sedimentary rocks?
Answer: the answer is B: Minerals dissolve and crystallize! :D
Explanation: hope this helps!
Which statement best describes what happens Which statement best describes a physical change?
Changes can occur to certain chemical properties of the substance, but the overall shape of the substance will remain the same.
Changes can occur to certain physical properties of the substance, but the overall shape of the substance will remain the same.
Changes can occur to physical properties of a substance, but the chemical composition of the substance remains the same.
Changes can occur to chemical properties of a substance, but the chemical composition of the substance remains the same.during a chemical change?
Answer: The third one, changes can occur to physical properties but the chemical composition remains the same.
Explanation: Chemical changes change the chemical composition. Physical changes do not.
if maria runs at a speed of 2 m/s, how far will she run in 60 seconds
Answer:
The answer is 120 mExplanation:
The distance covered by an object given it's velocity and time taken can be found by using the formula
distance = speed × timeFrom the question
speed = 2 m/s
time = 60 s
We have
distance = 2 × 60
We have the final answer as
120 mHope this helps you
The mass of a block is 12 g and the volume is 6 ml. Calculate the density of the block. (science)
Answer:
The answer is 2.0 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question
mass = 12 g
volume = 6 mL
We have
[tex]density = \frac{12}{6} \\ [/tex]
We have the final answer as
2.0 g/mLHope this helps you
Answer:
2.0 G/ML
Explanation:
what are electron configurations?
Answer:
In atomic physics and quantum chemistry , the electron configuration is the distribution of electrons of an atom or molecule (or other physical structure) in atomic or molecular orbitals. For example, the electron configuration of the neon atom is 1s 2 2s 2 2p 6, using the notation explained below.
Explanation:
i found it on google
Answer:
To calculate an electron configuration, divide the periodic table into sections to represent the atomic orbitals, the regions where electrons are contained. Groups one and two are the s-block, three through 12 represent the d-block, 13 to 18 are the p-block and the two rows at the bottom are the f-block.
Explanation:
In atomic physics and quantum chemistry, the electron configuration is the distribution of electrons of an atom or molecule in atomic or molecular orbitals. For example, the electron configuration of the neon atom is 1s² 2s² 2p⁶, using the notation explained below.
how do i know if the particles are monatomic or diatomic or tri-atomic or tetratomic
Explanation:
Monaotomic:- the elements that have only one atom in molecule are called monaotomic elements. they are stable. Example:-Ne,Ar all are noble gases
Diatomic:-the elements that have two atoms are called diatomic molecules. Example:- Oxygen
Triatomic:-the elments that have three atoms are called tri-atomic elements they are unstable. Ex.ozone
8.3 kg, 1.7 Kg/cm3
-> ? cm3
Answer:
4.9 cm³
Explanation:
Given data:
Mass value = 8.3 kg
Density = 1.7 kg/cm³
Volume = ?
Solution;
In given question from the units we got to know that the mass and density value is given and we have to calculate the volume.
Thus, we will apply density formula.
Density = mass/ volume
d = m/v
1.7 kg/cm³ = 8.3 kg/ v
v = 8.3 kg/ 1.7 kg/cm³
v = 4.9 cm³
Thus, the volume is 4.9 cm³.
How many electrons does the Mg+2 ion have?
Answer:
10 electrons
Explanation:
The easiest way to do this is to simply look at the periodic table, find the atomic number of magnesium, and subtract 2 from it. The reason this works is that the atomic number tells you how many protons an element has. If we want the element to be neutral, then by definition it will have the same number of electrons.
Answer:
10 Valence Electrons
Explanation:
Easiest thing to do is to look at your periodic table :)
3. A sample of tin has a volume of 9.0 cm. What is the mass of this sample?
The mass = 65.79 g
Further explanationDensity is a quantity derived from the mass and volume
Density is the ratio of mass per unit volume
With the same mass, the volume of objects that have a high density will be smaller than objects with a smaller type of density
The unit of density can be expressed in g/cm³ or kg/m³
Density formula:
[tex]\large {\boxed {\bold {\rho ~ = ~ \frac {m} {V}}}}[/tex]
ρ = density
m = mass
v = volume
To find its mass, we can search the density of tin on the web
the density of tin : 7.31 g/cc
cc=ml=cm³
So the mass :
[tex]\tt mass=\rho\times V\\\\mass=7.31\times 9\\\\mass=65.79~g[/tex]
How many electrons would Pd have if it had a +2 charge?_ How many electrons would Pd have if it had a +2 charge?
Answer:
80
Explanation:
W know that, the atomic no of lead (Pb) is 82. The no of protons is equal to the atomic no.
No of protons = 82
It has a charge of +2. It means that its lacks 2 electrons. No of electrons is :
e = 82-2
e = 80
Hence, Pd will have 80 electrons now.
why is the heating loop in the electric kettle at the bottom of the kettle?
Answer:
The heating element is near the bottom of the kettle because of the way it heats up the water. The water is heated through the flow of electricity meeting resistance in the form of the element.
Explanation:
What is the causes of gaseous
pressure ?
The equation 1/2 N2 + 3/2 H2+ NH3 is not appropriately written because
Answer:
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