Answer:
Atoms of a particular element must have the same number of protons but can have different numbers of neutrons. When an element has different variants that, while all having the same number of protons, have differing numbers of neutrons, these variants are called isotopes.
hope this helps
8. Converting Units The volumes in your data are in millimeters, which are equivalent to cubic centimeters, cm3. But your areas are in units of square meters (m2). To combine these, you will have to convert to similar units. Convert one of your volume measurements from units of cm3 to units of m2, showing your work. (Remember that 1 ×106 cm3 = 1 m2.)
Answer:
This question is a practical question and hence incomplete
Explanation:
However, there are some steps that can be followed to achieve the aim of this question.
To convert millimeters (mm) to cubic centimeters (cm³), the value in millimeter will have to be divided by 1000. This is because 1 mm equals 0.001 cm³. Hence, if the volume in the data is 30 mm, the equivalent in cm³ will be
30/1000 = 0.03 cm³
OR
1 mm ⇒ 0.001 cm³
30 mm ⇒ ?
Let's assume the unknown (?) is X
1 × X = 30 × 0.001
X = 0.03 cm³
Hence, 30 mm equals 0.03 cm³
Also, to convert any volume from cubic centimeter (cm³) to square meter (m²), you will divide the unit in cm³ by 1 × 10⁶ (1,000,000). To convert the value obtained earlier (0.03 cm³ or 3 × 10⁻² cm³) to m², you will
1,000,000 cm³ ⇒ 1 m²
0.03 cm³ ⇒ ?
Let's assume the unknown (?) is Y
1000000 × Y = 0.03 × 1
Y = 0.03/1000000 OR you can write it as 3 × 10⁻² × 10⁻⁶
Y = 3 × 10⁻⁸m²
Hence, 0.03 mm equals 3 × 10⁻⁸ m²
A mechanical pencil has a mass of 47.4 grams. The volume of the pencil is 15.8 cubic centimeters. What is the density of the pencil?
Answer:
3 g/cm^3
Explanation:
Density can be determined by mass divided by volume, or P=m/V.
This would be 47.4 grams (mass) / 15.8 cubic centimeters (volume). The units are grams per cubic centimeter, noted as g/cm^3.
Which of the three sub-atomic particles is the lightest?
a The proton
b The neutron
c The electron
d orbital
Answer:
The electron
Explanation:
The electron will be the lightest subatomic particle.
Answer:
The electron
Explanation:
Electron, lightest stable subatomic particle known. It carries a negative charge, which is considered the basic unit of electric charge. The rest mass of the electron is 9.10938356 × 10 −31 kg, which is only 1/1,836 the mass of a proton.
I WILL GIVE YOU BRAINLIEST!!!
Answer:
The second option
Answer:
Intent to cause harm
Is neon transparent translucent or opaque
Neon is transparent opaque as it is light, colorless and order less inert noble gas.
What are noble gas?Noble gas are defined as the element that belong to group 18 of the modern periodic table.
It is also known as inert gas or aerogene.
Noble gas are light, transparent, colorless and order less gases.
They are the group of six inert or non reactive gases.
Noble gases are odorless, colorless, nonflammable gases with negligible chemical reactivity.
Noble gases are exceedingly stable and unlikely to form chemical bonds due to their complete valence electron shells, which have no tendency to add or lose electrons.
Noble gas were originally classified as group 0 in the periodic table because it was thought they had a valence of zero, which means their atoms could not mix with those of other elements to form compounds.
Thus, Neon is transparent opaque as it is light, colorless and order less inert noble gas.
To learn more about noble gas, refer to the link below:
https://brainly.com/question/2094768
#SPJ2
where are the electrons found in Bohrs atomic model
Answer:
Explanation
In the Bohr model of the atom, electrons travel in defined circular orbits around the nucleus. The orbits are labeled by an integer, the quantum number n. Electrons can jump from one orbit to another by emitting or absorbing energy.
A student finds a rock on the way to school. In the laboratory he determines that the volume of the rock by placing the rock in a graduated cylinder with 50 mL of water and watched the water rise to 72.7 mL. The student determined the mass is 39.943 g through the use of a triple beam balance. What is the density of the rock?
Answer:
1.76 g/mL
Explanation:
You need to find the volume. You can do this by subtracting the volume of the water and the rock by the volume of the water.
72.7 mL - 50 mL = 22.7 mL
Now that you have volume, divide the mass by the volume to find the density.
39.943 g/22.7 mL = 1.76 g/mL
The atomic radius of magnesium is 150 pm. The atomic radius of strontium is 200 pm. What is the atomic radius of calcium
Answer:
The atomic radius of calcium is approximately 175
Explanation:
Given that the atomic radius of magnesium = 150 pm
The atomic radius of strontium = 200 pm
Therefore, given that calcium comes in between magnesium and strontium in group 2 of the periodic table, the atomic radius should be half way between the length of the atomic radius of magnesium and strontium, given that the atomic radius is not a fixed quantity
Therefore;
The atomic radius of calcium is approximately given as follows;
The approximate atomic radius (200 + 150)/2 = 175 pm.
Number of paired electrons in Li
365,000,000 scientific notation
2. A substance that is solid, has a shiny orange color, conducts electricity well, and melts
when heated could MOST likely be classified as ?
Answer: Aluminium
Explanation:
The metals are solid substances, they have shiny luster, they conduct electricity and have high melting point. The aluminium is a kind of metal that have a solid surface, it has a shiny luster, the surface of metal appears to be polished. It conducts electricity and can be used in electrical cords, connections, and devices. It has a high melting point.
Plz help me complete this table
Answer:
9,19,9,10,9,F
15,29,14,15,14,Si
22,47,22,25,22,Ti
25,55,25,30,25,Mn
35,80,35,45,35,Br
8,16,8,8,8,O
47,108,47,61,47,Ag
16,32,16,16,16,S
82,207,82,125,82,Pb
Explanation:
Atomic number = number of protons = number of electrons
Mass number = number of protons + number of nuetrons
is the cause of rapid oxidation explosion
PLEASE HELP ASAP How many moles are there in 2.25 x 10^25 atoms of Zinc?
How many atoms are there in 9500.0 mg of Fluorine?
Answer:
There are 6.023 x 10^23 fluorine atoms.
Explanation:
How many moles of titanium are there in 32.5 grams of titanium?
Answer:
0.159 moles of Ti
Explanation:
32.5 g of Ti x (1 mol of Ti / 204.4 g of Ti) = 0.159 moles of Ti
these are the last 2 questions on my assignment.... please help
1..orbit
2..7
I hope this was helpful
Which student’s responses are correct?
Answer:j
Explanation:im not stupid??
Answer:
2
Explanation:
student 2 is correct because the number of protons determines what element an atom is, and the number of valence electrons shows how the atom bonds and its reactivity.
What is the density of a rectangle solid with dimensions
of 15 cm x 25 cm x 5 cm and has a mass of 3000 g?
Answer:
5625000gm/cm^3
Explanation:
volume=w*h*l=25*15*5=1875cm^3
density=mass*volume
=1875*3000
=5625000gm/cm^3
How is the modern periodic table arranged?
by increasing atomic number
by increasing electronegativity
by increasing ionic size
by increase in atomic mass
Find the mass of a 50.0 ml quantity of water if the density of water is 3.25 10 poin g/ml * O 15.38 g O 162.5 g 0.0659 O 124.3g What is an extensive property? * 10 poli
if 11 molecules of monosaccharides with the formula C6H12O6 are assembled to produce a complex carbohydrate, how many atoms of hydrogen be in the final polymer?
Oxidation state of sulphur in H2S 2o7
Answer:
+6
Explanation:
2(+1)+2x+7(−2)=0
2+2x−14=0
2x=+12
x=+6
cubic centimeter (cm^3) has the same volume as a
Answer:
1 cc=1 ml=0.001 liter
Explanation:
One cubic centimeter has the same volume as one milliliters. Both are equally used in analytical problems to express the volume of a substance.
What is volume ?Volume is a physical quantity that measures the total space occupied by a substance. Volume is an extensive quantity and thus depends on the amount of the substance.
The mass of a substance per unit volume is called its density. Volume is dependent on the intermolecular forces between the particles of the substance. The SI unit of volume is liter (L). Other units are ml, cm³, dm³ etc.
One cubic centimeter has the volume as one milliliters.
Hence, 1 cm³ = 1 ml
1000 m or 1000 cm³ is one liter of the substance.
Find more on volume:
https://brainly.com/question/13338592
#SPJ2
Which of the following are an example of a polysaccharide?
A.starch
B.chitin
C.cellulose
D.sucrose
Examples include storage polysaccharides such as starch, glycogen and galactogen and structural polysaccharides such as cellulose and chitin. Here's the answer, but I think it's A
You pour some juice from a short, wide glass into a tall, narrow glass. What happens to the volume of the juice? Explain your reasoning.
Answer: the volume increases
Explanation: It increasses because the volume is how tall it is
Which is more scientific, what is the air made out of? or why is there air?
Answer:
why is there air
Explanation:
it sounds more smarter and sounds like something someone would want to know
A cube of aluminum has a mass of 500g. What will be the mass of a cube of magnesium of the same dimensions?
(Density of aluminum is 2.7g/ml)
The mass of a cube of magnesium : 322.2 g
Further explanationDensity is a quantity derived from the mass and volume
Density is the ratio of mass per unit volume
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 , g / ml
m = mass , g
v = volume , ml
mass of aluminum = 500 g
density of aluminium = 2.7 g/ml
there is data that needs to be added⇒ density of magnesium : 1.74 g/ml
the same dimensions = the same volume
volume of aluminum[tex]\tt V=\dfrac{m}{\rho}\\\\V=\dfrac{500}{2.7}=185.19~ml[/tex]
mass of magnesiumV magnesium = V aluminum
[tex]\tt m=\rho\times V\\\\m=1.74\times 185.19\\\\m=\boxed{\bold{322.2~g}}[/tex]
The cube of same dimensions of magnesium and aluminum have same volume. The mass of cube of magnesium has been 321.85 grams.
What is density?The density has been given as the mass of substance per unit volume. The density of aluminum cube has mass 500 grams, and density 2.7 g/mL. The volume of the aluminum cube has been:
[tex]\rm Density=\dfrac{Mass}{Volume}\\\\2.7\;g/mL=\dfrac{500\;g}{Volume} \\\\Volume=185.18\;mL[/tex]
The volume of the magnesium and aluminum cube has been the same. The density of magnesium has been 1.735 g/mL. Thus, the mass of Mg cube has been given as:
[tex]\rm 1.738\;g/mL=\dfrac{Mass}{185.18\;mL}\\\\ Mass=321.85\;g[/tex]
Thus, the mass of magnesium cube has been 321.85 grams.
Learn more about density, here:
https://brainly.com/question/952755
Oxygen and silicon makes up what percentage of the Earth crust.
A) 57% B) 98.5% C) 75% D) 50%
answer
the answer is C
explanation
this is because the oxygen makes up 46.1%of the earth's surface while silcon is 28.5% and the question says "what makes up" which means you should add them and it becomes 74.6% which Is approximately 75%
Test anxiety symptoms can include
a. Shaky hands
b. Sweating
C. Headaches
d. All of these
Please select the best answer from the choices provided
O A
B
С
Answer:
D.) All of the above
Explanation:
Anxiety can cause sweating, chaky hands, headaches etc
How many moles are in 7.9 grams of P 2 O 5?
Answer: 0.0556555468903552 moles, you can estimate that to its nearest hundreth, or thousandth.
Explanation:
im just naturally a genius
