Answer:
the answer is 7.936X 10⁻⁷kg.... the unit for volume must be cm³
Explanation:
we know,
ρ =m/v
given,
ρ =19.84/1000X(100)²= 1.984X10⁻⁶kg/m²
V (volume of the container means the volume of the element)=2.5 m³
NOW putting in the equation
1.984X10⁻⁶/2.5=m
or, m=7.936X 10⁻⁷kg(ANS)
thank u(i am not 100% sure but think it shoud be the answer)
How does peer review affect research?
Experimental results will be trusted by the scientific community only if they have been peer-reviewed. Thus, option A is correct.
What is research?Research is the creation of new knowledge and/or the use of existing knowledge in a new and creative way so as to generate new concepts and understandings.
“Peer-reviewed” means that the paper is analyzed by fellow scientists, who evaluate the logic or methodology that might shed doubt on the findings.
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I need help with this question. Will give 5 stars
Answer:
yes
Explanation:
HELP ASAP
What is volume? O A. The measure of the amount of space a substance takes up B. The measure of the amount of space per unit of volume O C. The measure of the amount of matter per unit of volume O D. The measure of the amount of matter in a substance
Answer:
A. The measure of the amount of space a substance takes up
Explanation:
Something made of all one material
Answer:
element
Explanation:
an element is something made up of only one type of atom
Which substance is composed of only one type of atom? A: water B: sugar C: salt D: gold
Answer:
Gold
Explanation:
water = H2O(3 atoms)
Sugar = C12H22O11 (45 atoms)
Salt = NaCl ( 2 atoms)
Gold = Au ( 1 atom)
A substance that is composed of only one type of atom is gold. Thus, the correct option for this question is D.
What is an atom?An atom may be defined as the smallest unit of any matter that has the ability to form a chemical element. An atom may also be characterized as a particle of matter that uniquely illustrates a chemical element.
Water is composed of two atoms which are hydrogen and oxygen. Its chemical formula is [tex]H_20.[/tex] Sugar is a complex compound that consists of atoms of Carbon, hydrogen, and oxygen. Its chemical formula is [tex]C_6H_1_2O_6.[/tex] Salt typically consists of atoms of sodium and chlorine. Its chemical formula is NaCl.
Therefore, gold is a substance that is composed of only one type of atom. Thus, the correct option for this question is D.
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ANSWER ASAPP
What causes the motion of particles? And more energy equals what?
Answer:
particles in solids are always vibrating (moving back and forth) in place the vibrational motion of particles in solids is kinetic energy heat makes the particles in a solid vibrate faster, giving them more kinetic energy faster-vibrating particles bump into one another more often and hit each other harder
When heating test tubes, always slant them away from yourself and others.
True
False
Answer:
true
Explanation:
When exposed to very high temperatures, metals like iron can be turned into fluids that flow and can be poured into molds. What happens within the iron to allow it to flow?
Answer: the particle vibrate
!
Why do atoms always contain the same number of electrons and protons?
Answer:
An electron is a negatively charged subatomic particle and a proton is a positively charged subatomic particle. Positive charge(s) attract negative charge(s) and vice versa. The proton and neutron stay together and attract one another to give the atom an overall charge of zero (neutral). Which is the charge of an atom. When there is an unequal number of protons and neutrons an ion is formed. If the number of protons are more than the electron, a positively charged ion called cation is formed. On the other hand, if the number of electrons are more than the protons a negatively charged ion called anion is formed.
Answer:
When an atom has an equal number of electrons and protons, it has an equal number of negative electric charges (the electrons) and positive electric charges (the protons). The total electric charge of the atom is therefore zero and the atom is said to be neutral. ... Chemically, we say that the atoms have formed bonds.
Explanation:
two samples of the same material are touching directly.
1.) Name the process is happening
2.) Describe in what direction the heat will flow and why
Answer:
1) The process that occurs were two items are in direct contact with each other is known as conduction. Conduction is the form of heat transfer that occurs or requires the direct contact of two bodies before it can take place
2) In heat transfer, heat would flow from the hotter sample sample through the process of conduction until thermal equilibrium is established
Explanation:
Which statement below correctly identifies the number of subatomic particles inside and outside the nucleus of an argon atom?
A. There are 18 particles inside the nucleus and 18 particles outside the nucleus.
B. There are 40 particles inside the nucleus and 18 particles outside the nucleus.
C. There are 40 particles inside the nucleus and 40 particles outside the nucleus.
D. There are 40 particles inside the nucleus and 22 particles outside the nucleus.
Answer:
A
Explanation:
Argon atom is a noble gas. In argon atom, there are 18 particles inside the nucleus and 18 particles outside the nucleus. Thus, the correct option is A.
What is Argon atom?Argon is a non-metal element. It belongs to the group 18 (VIIIa) of the modern periodic table of chemical elements. This group is also called the noble gases group of the periodic table.
The argon atom is a noble gas which is made up of 18 protons and 18 electrons which are present inside the nucleus and outside the nucleus of the atom, respectively. The atom contains eight electrons in its outermost shell. Argon is a colorless and an odorless gas under the normal conditions. When argon is activated by the treatment of a high-voltage electric field, it emits a violet-colored light.
Therefore, the correct option is A.
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A scientist grew bacteria on gel in her lab.
She wanted to find out if bacteria would grow faster on gel A or gel B.
she placed a few bacteria on gel A and a few on gel B.
After 24 hours, she observed how many bacteria were present.
Identify the independent and dependent variables.
Answer:
The independent variable is type of gel and the dependent variable is the number of bacteria.
Explanation:
An experiment generally tests how one variable is affected by another. The affected variable is called the dependent variable. In the plant experiment shown above, the dependent variable is plant growth. The variable that affects the dependent variable is called the independent variable. In the plant experiment, the independent variable could be fertilizer—some plants will get fertilizer, others will not. The scientists change the amount of the independent variable (the fertilizer) to observe the effects on the dependent variable (plant growth). An experiment needs to be run simultaneously in which no fertilizer is given to the plant. This would be known as a control experiment. In any experiment, other factors that might affect the dependent variable must be controlled. In the plant experiment, what factors do you think should be controlled? (Hint: What other factors might affect plant growth?)
How many values of these of these trials can be considered accurate?
Answer:
go to google
Explanation:it all ways work
is pepperoni pizza an element, compound,
heterogeneous mixture, or homogeneous mixture?
Pepperoni pizza is a heterogeneous mixture. Therefore, option C is correct.
A heterogeneous mixture is a type of mixture that consists of visibly different substances or phases that are not uniformly distributed. In a heterogeneous mixture, the different components can be easily distinguished and separated. The composition and properties of the mixture can vary at different locations within the mixture.
In a heterogeneous mixture, the substances do not blend together at the molecular level, unlike in a homogeneous mixture where the components are uniformly distributed.
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An unknown Element X is discovered. Element X is found to have varying numbers
of valence electrons and has a high melting point. Which group does Element X most
likely belong to?
Transition Metals
Halogens
Alkali Metals
Noble Gases
help me please i need to sleep
Cloud is a gas.
ice is a solid.
snow is a solid.
steam is a gas.
rain is a liquid.
If a substance has a mass of 12.50 g and takes up 3.4 mL of space, what is the density?
Answer:
The answer is
3.68 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} [/tex]From the question
mass of substance = 12.50 g
volume = 3.4 mL
The density of the substance is
[tex]density = \frac{12.50}{3.4} \\ = 3.676470588...[/tex]
We have the final answer as
3.68 g/mLHope this helps you
1. Identify the layer of Earth that is made primarily of silicon and oxygen.
Crust
Mantle
Core
Answer:The crust
Explanation:
Before you start an investigation, you see the Hazard symbol for Electrical Hazard. What safety steps should you follow when conducting this investigation?
Explanation:
Safety hazards means they are are the unsafe working conditions which can cause the workmen injury, illness, or death. Safety hazards are some of the most common risks at the workplace.
Electrical hazards may be defined as a place or a condition which is dangerous and where a person working can come in contact with electrical contact with some energized equipment or any electrical conductor. There is always danger or a chance for the workmen to get injury or get a flash burn while working.
The safety steps are :
1. Follow the instruction properly
2. Take proper safety measures like wearing gloves, shoes, not touching any live wires, etc.
3. Follow the clean up procedure properly.
Answer:
The safety steps are :
1. Follow the instruction properly
2. Take proper safety measures like wearing gloves, shoes, not touching any live wires, etc.
3. Follow the clean up procedure properly.
Explanation:
What happens to the price of the mineral that was extracted when mining companies are required to reclaim the land that they used for mining? Please help me.
Does it go down
Increase
No effect
Or stays the same
Answer:
innerdisactive react to be step counter function.
Explanation:
i feel
Match the labels to the
diagram
Cell
Vacuole
membrane
Nucleus
Endoplasmic
reticulum
Ribosomes
Lysosome
Golgi
body
Mitochondrion
Answer: For the first blank, that is the endoplasmic reticulum
For the second, it is lysosome
For the third blank, it is the cell membrane
For the fourth, it is the ribosomes
For the fifth, that is the vacuole
For the sixth, that is mitochondrion
For the seventh, that is Golgi body
And lastly the eighth, it is the nucleus
It goes in a circle from top left to top right
What the other guy said
it is very much correct
PLEASE GIVE THEM BRAINLIEST THEY DESERVE IT!!
6. An alloy of iron contains 75.0% iron and 25.0% other elements. How many grams of iron are present in 150. g of the alloy?
Answer:
108.5
Explanation:
half of 150 is 75 and half of that is 32.5. Add that to 75 and you'll get your answer
112.5 g of iron is present in the alloy.
From the question given above, the following data were obtained:
Percentage of iron (Fe) = 75%
Percentage of other elements = 25%
Mass of the alloy = 150 g
Mass of iron (Fe) =?The mass of the iron present in the alloy can be obtained as follow:
[tex]Percentage = \frac{mass of element }{total mass }\\\\[/tex]
75% = [tex]\frac{mass of Fe}{150}[/tex]
[tex]0.75 = \frac{mass of Fe}{150}\\\\[/tex]
Cross multiply
Mass of Fe = 0.75 × 150
Mass of Fe = 112.5 gTherefore, 112.5 g of iron is present in the alloy.
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Which of the following is an example of an intensive physical property?
a. boiling point
b. height
c. volume
d. none of the above is an example of intensive properties
e. all of the above are examples of intensive properties
Answer:
boiling point is an intensive property because it stays the same no matter the amount of an element or molecule
Explanation:
PLEASEEE ANSWERRR FASTT
Number 5 is metal & number 6 is nonmetals
Explanation:
Question 3 of 10
Which of the following elements shows little reactivity?
A. Potassium (K)
B. Sulfur (S)
C. Fluorine (F)
O D. Argon (Ar)
Answer: Correct answer is
Ar- Argon
Explanation:
A P E X :)
What is the net charge of a nitrogen atom with 8 electrons
Answer:
– 1
Explanation:
From the question given above, we obtained the following:
Electron = 8
Net charge of nitrogen =.?
Nitrogen has atomic number of 7. This also means that nitrogen has 7 proton because atomic number of an element is the equal to number of protons in the atom of the element.
Thus, we can obtain the net charge of nitrogen with 8 electrons by calculating the difference between the protons and electrons of the nitrogen atom. This can be obtained as follow:
Proton = 7
Electron = 8
Net charge = Proton – Electron
Net charge = 7 – 8
Net charge = – 1
Therefore, the net charge of the nitrogen atom with 8 electrons is – 1
Calculate the number of moles for 12.044*10^23 number of helium atoms
Answer:
Explanation:
number of moles=number of particle (atoms)/avogadro number (NA)
we know that avogadro number is equal to 6.23*10^23
given number of atoms=12.044*10^23
therefore
moles=12.044*10^23/6.23*10^23=1.9=2
TIME REMAINING
01:29:12
Which technology has helped improve scientists' ability to gather scientific data about the movement of sea turtles?
O satellite tracking
O thermometers
O probeware
microscopes
the first one satellite tracking
Answer:
I believe the answer is A. Or the 1st dot.
Explanation:
2. How many kilometers are in 8432 meters?
Answer:
8.432 Kilometers
Explanation:
This is the answer because 1 kilometer equals to 1,000 meters:
1) Divide 8432 with 1,000
2) Once you divide, you will get 8.432 as your answer
Hope this helps!
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.