Answer:
true
Explanation:
find the odd one out and explain the reason why ? sand , sugar , salt , baking soda
Answer: Sand
Explanation: Out of all the choices, sand is the only one that cannot react with other substances.
Answer:
sand
Explanation:
all are used mostly in cookin and preparing things and are in the kitchen
Which of the following is one way creativity can help scientists?
Answer:
One way creativity is helpful to scientists is when they need to come up with a experiment or cure for something their imaginastion is very helpful. The reason for that is with creativity they could get answers much quicker!
Explanation:
Answer:
I agree with that answer
Find the exact value. tan(−300∘)
Explanation:
tan(-300) = tan(-300+360) = tan (60)
here we added 360 degree. where by adding 360 +or- (n×360) to the any angle nothing will change as they called equivalent angles
equivalent angles is by adding +or- n×360 to any angle is equivalent to that angle so tan(-300) = tan(60) then we will calculate tan(60) on the calculator
Would convection occur if Earth's mantle were a box 30 km on a side?
Answer:
No.
Explanation:
No, convection does not occur if Earth's mantle were a box 30 km on a side because convection needs medium for the movement of heat energy from one place to another. Convection and conduction are two processes which needs medium for its movement while radiation does not need any medium for its movement. If there is a empty space present between two substances so convection does not occur.
Which statement about the physical change of liquid water boiling into steam is true?
The heat added represents an energy change.
The action cannot be reversed.
The steam cannot conserve mass.
The weight lost represents a mass change.
Answer:
it A
Explanation:
ed 2020
Click here to access the interactive simulation. You will practice balancing chemical equations by playing an interactive game. After accessing the website, select the game box and start with level 1, followed by levels 2 and 3. The goal of these games is to have the same number of atoms on each side of the equation.
In level 1, you balanced the equation N2 + H2 →
NH3. What number did you place in front of ammonia (NH3)?
In level 2, you balanced the equation C + H2O → CH4 +
CO2. What number did you place in front of carbon dioxide (CO2)?
In level 3, you balanced the equation NH3 + O2 → NO2 +
H2O. What number did you place in front of water?
Answer:
In level 1, you balanced the equation N2 + H2 →
✔ 2
NH3. What number did you place in front of ammonia (NH3)?
In level 2, you balanced the equation C + H2O → CH4 +
✔ 1
CO2. What number did you place in front of carbon dioxide (CO2)?
In level 3, you balanced the equation NH3 + O2 → NO2 +
✔ 6
H2O. What number did you place in front of water?
Explanation:
Edge:2020
Answer: 2,1,&6
Explanation: the answer
Members of group # ___ do not form ions or react with other elements.
Answer:
VIIA group donot form ions or react with other elements. This group is also called noble gases or inert gases which donot take part in chemical reaction.
Find the volume of the a with a length of 5cm, a width of 5cm, and height of 10cm.
Answer:
250 cm³
Explanation:
V = l × w × h
V = (5) × (5) × (10)
V = 250 cm³
What are the names of the products in the chemical equation shown below
Answer:
Yea I don't see any answers below but when you do I would love to help too!
Explanation:
If the density of water is 1.0 g/mL, what is the mass of 2.0 L of water?
Answer:
Density=1.0 g/mL
Volume=2.0 L
Mass=?
Density=mass/volume
Mass=density*volume
Mass=1.0*2.0
Mass=2g
story that explains an example of a scientific method
Answer:
I don't understand you question
HELP PLEASE!!!
what is the density of a cube that has the volume of 12mL and a mass of 6g? express in g/mL
Answer:
The density of the cube is 0.5g/mL. Hoped this helped! :)
Explanation:
V= 12.0mL D=M/V
M= 6.0g
D= 6.0g/12.0mL
D= 0.5g/mL
Which ion has a charge of 2-?
Ion A: 8 Protons,10 Neutrons,10 Electrons
Ion E:9 Protons,10 Neutrons,10 Electrons
Ion G:11 Protons,12 Neutrons,10 Electrons
Ion J:12 Protons,12 Neutrons,10 Electrobs
Answer:
A
Explanation:
More electrons than protons, thus giving the atom an overall charge of -2
A student measures the mass of a substance as 1.7132kg and it's volume as 0.65l. What is the density substance in g/mL? Round your answer to the correct number of significant figures
Answer:
The substance has a density of 2.636 grams per mililiter.
Explanation:
We must remember that density ([tex]\rho[/tex]), measured in grams per mililiters, is the mass of the substance ([tex]m[/tex]), measured in grams, divided by its volume ([tex]V[/tex]), measured in mililiters. That is:
[tex]\rho = \frac{m}{V}[/tex]
In addition, a kilogram equals 1000 grams and a liter equals 1000 mililiters. If we know that [tex]m = 1713.2\,g[/tex] and [tex]V = 650\,mL[/tex], then:
[tex]\rho = \frac{1713.2\,g}{650\,mL}[/tex]
[tex]\rho = 2.636\,\frac{g}{mL}[/tex]
The substance has a density of 2.636 grams per mililiter.
A given volume of methane diffuses in 20 seconds How long will it take the
same volume of sulphur (IV) oxide to
diffuse under the same condition
(Methane = 16, Sulphur (IV) oxide=64)
Explanation:
Relative molecular mass of CH4 = 12 * 1 + 4 = 16
Relative molecular mass of SO2 = 32 + 10 *2 = 64
tSO2/tCH4 = √MSO2/MCH4
t/20 = √64/16 = √4
t/20 = 2
∴ t = 20 * 2 = 40sec
Briefly summarize how heavy elements are created
Answer:
Heavy elements are created by fusing two elements together in a lab. They look for “events” that comprise a series of alpha decays that result in spontaneous fission.
Explanation:
Atoms of different element can not have same atomic number because only same type of atoms combine to form element. Atoms belonging to different element can have different atomic number. Therefore, in below given ways we can summarize how heavy elements are created.
What is element?Element generally consist of atoms or we can atoms combine to form element. Atoms of an element is always same, means all the properties of all atoms of one type of element is same.
Elements heavier than iron cannot be created by fusion because the reaction requires energy to occur. We do, however, perceive elements other than iron all around us. This is accomplished by supernova explosions, which result in neutron capture processes and the production of heavy materials.
Therefore, in above ways we can summarize how heavy elements are created.
To know more about element, here:
https://brainly.com/question/8460633
#SPJ2
Students learned that objects can exert forces on other objects without touching. Which three investigations will provide evidence what they have learned. a measuring how close a soda can must be before it rolls toward a balloon that has been rubbed
Answer:
b
Explanation:
What do the elements Nickel and Technetium have in common?
Answer:
Both Nickel (Ni, 28, 58.69) and Technetium (Tc, 43, [98]) have these features in common:
transition metalssome gray color (Tc is silver)are in the d blockhave two electrons in valence shell (although Tc's valence is 6)very similar electronegativity levels (1.9 vs 1.91)don't have a refractive indexdon't have a critical temperaturedon't have a heat of combustion measurementdon't have an EU Number or NFPA hazard leveldon't have an autoignition point or a flashpointThere are various kind of elements that are present in periodic table. Some elements are harmful, some are radioactive, some are noble gases. Therefore, nickel (Ni) and technetium (Tc) belongs to d block element.
What is periodic table?Periodic table is a table in which we find elements with properties like metals, non metals, metalloids and radioactive element arranges in increasing atomic number.
Periodic table help a scientist to know what are the different types of elements are present in periodic table so that they can discover the new elements that are not being discovered yet.
Both Nickel (Ni) and Technetium (Tc) have these features in common:
Both are transition metals that is belong to d block
Both have two electrons in valence shell
Electronegativity value of these elements are same
Therefore, nickel (Ni) and technetium (Tc) belongs to d block element.
Learn more about periodic table, here:
https://brainly.com/question/11155928
#SPJ2
Which characteristic best explains why gases are more compressible than liquids or solids?
A Gas particles tend to attract one other, while liquid and solid particles tend to repel each other.
B. Gas particles tend to be separated by larger distances than liquid or solid particles are.
C Gas particles tend to move more rapidly than liquid or solid particles do.
D. Gas particles tend to clump together as their temperatures increase
Answer:B
Explanation:
Answer:This chapter begins the first where we will look at matter on a microscopic scale. Matter is made of small particles of atoms or molecules. There are three common states of matter, solid, liquid and gas. A gas and a liquid will change shape to fit the shape of their container. A gas will change volume to fit the volume of the container.
Explanation:
In general, solids are denser than liquids, which are denser than gases. . The particles in the solid are touching with very little space between them. The particles in a liquid usually are still touching but there are some spaces between them. The gas particles have big distances between them.
Solid – In a solid, the attractive forces keep the particles together tightly enough so that the particles do not move past each other. Their vibration is related to their kinetic energy. In the solid the particles vibrate in place.
Liquid – In a liquid, particles will flow or glide over one another, but stay toward the bottom of the container. The attractive forces between particles are strong enough to hold a specific volume but not strong enough to keep the molecules sliding over each other.
Gas – In a gas, particles are in continual straight-line motion. The kinetic energy of the molecule is greater than the attractive force between them, thus they are much farther apart and move freely of each other. In most cases, there are essentially no attractive forces between particles. This means that a gas has nothing to hold a specific shape or volume.
(A fourth state of matter, called plasma, exists when a gas becomes ionized. Plasma exists inside stars and in interstellar gases.)
Question 3
A milkman adds a very small amount of baking soda to fresh milk.
(a) Why does he shift the pH of the fresh milk from 6 to slightly alkaline?
Answer:
Curd is acidic in nature, because an acidic substance has less value of pH. A milkman adds a very small amount of baking soda to fresh milk. Why does he shift the pH of the fresh milk from 6 to slightly alkaline? Answer: By making the milk more alkaline, it takes more time to turn into curd.
The total number of d orbitals in the third principal energy
level is
Answer:
Five.
Explanation:
The third principal energy level has one s orbital, three p orbitals, and five d orbitals, which can each hold up to 10 electrons. This allows for a maximum of 18 electrons.
If the block were to be cut in half, what would be the
density of the smaller block?
Answer:
Density stays the same
Explanation:
The density remains the same because cutting the object in half will divide the mass & volume by the same amount. Also, the density of a substance remains the same no matter what size it is.
Increasing the temperature of a solution will slow down the dissolving/dissolution of the solute.
True
False
Answer:
False
Explanation:
It will actually speed it up
Which is the electron configuration for nobelium (No)?
O [Rn]7s25414
O [Rn]7s2547
O [Ne]3s 3p
O [Xe]6s25d1
Plz help
Answer:
the answer is [Rn]7s25f14 (first option)
Explanation:
i took the test
The electronic configuration for nobelium (No) is [Rn]7s²5f¹⁴, hence the correct option is A.
What is electronic configuration?The distribution of an element's atoms' electrons throughout several atomic orbitals is symbolically represented by the electronic configuration of that element.
A standardized nomenclature is used for expressing electron configurations, in which the energy level and type of orbital are written first, followed by the number of electrons in the orbital, which is expressed in superscript.
The atomic number of nobelium (No) is 102.
The number of protons is equal to the atomic number, which is 102.
The number of electrons is equal to the number of protons, which is 102.
Therefore, electronic configuration for nobelium (No) is [Rn]7s²5f¹⁴.
Learn more about electronic configuration, here:
https://brainly.com/question/29757010
#SPJ7
The given question is incomplete, so the most probable complete question is,
Which is the electron configuration for nobelium (No)?
A. [Rn]7s²5f¹⁴
B. [Rn]7s²5f⁷
C. [Ne]3s²3p⁷
D. [Xe]6s²5d¹
Who first arranged the elements according to atomic mass ?
Answer:
Dmitri Mendeleev
Explanation:
In 1869, just five years after John Newlands put forward his Law of Octaves, a Russian chemist called Dmitri Mendeleev published a periodic table. Mendeleev also arranged the elements known at the time in order of relative atomic mass, but he did some other things that made his table much more successful.
A scientist studies living organisms in their natural setting
Answer:
did not
Explanation:
ask
In chemistry she wants to know why to certain items or people shock me?
What is another common name for the lanthanoids on the periodic table?
Which Statement correctly describes protons
A.They no charge and are present in the nucleus of an atom.
B.They have a negative charge and travel around the nucleus
C.They have a positive charge and travel around the nucleus of an atom
D. They have a positive charge and are present in the nucleus of an atom along with the neutrons
Answer:
D.
They have a positive charge and are present in the nucleus of an atom along with the neutrons.
explanation:
Protons have a positive charge.
What is a particle with one positive charge called?
Answer:
Proton: A positively charged particle found in the nucleus of an atom. A proton contributes one atomic mass unit to the total atomic weight of an atom.
Explanation:
Answer:
A proton
Explanation:
A proton is a positive charge found in an atom