Answer:
The answer is 0.8 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question we have
[tex]density = \frac{20}{25} = \frac{4}{5} \\ [/tex]
We have the final answer as
0.8 g/cm³Hope this helps you
What characteristics do atoms of manganese- 55, iron-56, and nickel-58 have in common?
Answer:
same number of protons differnt number of nuetrons
Explanation:
Atoms of manganese- 55, iron-56, and nickel-58 have same number of neutrons and different number of protons.
Number of protons:It is same as the atomic number of an element.
Number of Neutrons:It is the difference between the mass number and atomic number or number of protons.
Manganese- 55:No. of protons = 25
No. of neutrons = 30
Iron-56:No. of protons = 26
No. of neutrons = 30
Nickel-58:No. of protons = 28
No. of neutrons = 30
Thus, the number of neutrons in all the atoms is same i.e. 30.
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is it true that the atomic radius of A1 is greater than the atomic radius of In ?
Answer:
Yes
Explanation:
Yes it is true
b. Water has a specific heat of 4.184 J/gºC. If the temperature of 250 g of
water changes from 22.9°C to 14.7°C, how much heat energy was removed
from the water?
Answer:
The statement means that in every interaction, there is a pair of forces acting on the two interacting objects. The size of the forces on the first object equals the size of the force on the second object. The direction of the force on the first object is opposite to the direction of the force on the second object. Forces always come in pairs - equal and opposite action-reaction force pairs.
Explanation:
The statement means that in every interaction, there is a pair of forces acting on the two interacting objects. The size of the forces on the first object equals the size of the force on the second object. The direction of the force on the first object is opposite to the direction of the force on the second object. Forces always come in pairs - equal and opposite action-reaction force pairs.
Does anybody understand this I’m stuck
Answer:
it's the first one
Explanation:
can you help me too
Order the masses from smallest to largest
Can someone please tell me if this right.
Answer:
1. 7.86 × 10⁴ g
2. 7.86 × 10⁴ kg
3. 1.989 × 10¹³ mg
4. 1.989 × 10²⁸ kg
5. 1.989 × 10³³ g
Explanation:
The easiest way to make sure you have the right answer is to convert all units to the same unit.
A. 1.989 × 10¹³ mg = 1.989 × 10¹⁰ g
B. 7.86 × 10⁴ g
C. 1.989 × 10³³ g
D. 7.86 × 10⁴ kg = 7.86 × 10⁷ g
E. 1.989 × 10²⁸ kg = 1.989 × 10³¹
The correct order is B < D < A < E < C
Show with dot and cross diagram of the formation of ions in the reaction of Fluorine with sodium ions.
Answer:
Please check the attached file
Explanation:
Sodium is present in group one. It has one valence electron. It is alkali metal. All alkali metal form salt when react with halogens.
Sodium need to lose one electron to get stable. All halogens have seven valence electrons they need only one electron to get stable electronic configuration.
When alkali metals such as sodium react with halogen fluorine it loses its one valence electron which is accepted by fluorine and ionic bond is formed. The compound formed is called sodium fluoride.
In cross and dot diagram electrons of one atom are shown as dots while other atom shown as cross to distinguish.
Please check attached file for electron dot diagram.
Which describes 5 molecules of water?
1. 2 H2O
2. H2O3
3. 5 H2O
5 molecules of water is 5 H2O.
One water , H2O. molecule consist of one oxygen atom bonded with two atoms of hydrogen. The structure of water molecule is bent. Water is a polar compound. Oxygen is more electronegative than the hydrogen atom. The oxygen atom get partial negative charge and the hydrogen atoms get partial positive charge. Water is a universal solvent. The hydrogen and oxygen atoms are held together by a covalent bond . covalent bond is formed by the sharing of electrons between the two atoms. water The chemical name of water is Dihydrogen monoxide.
Thus, 5 molecules of water is 5 H2O.
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The movement of substances from an area of low concentration to an area of high concentration is called what?
Answer:
Diffusion
Explanation:
Answer:diffusion
Explanation:
please help me.......
Answer:
D as in :D lol
Through which material does light move fastest?
Answer:
Explain that unlike sound, light waves travel fastest through a vacuum and air, and slower through other materials such as glass or water.
Explanation:
Hope this helped.
Answer:
empty space
Explanation:
There are seven petals on that flower.
O
qualitative
quantitative
A reef that surrounds a volcanic island is an
Answer:
atoll
Explanation: this is correct, pls give me brainliest
Question 5
1 pts
Chloroethene,C2H3C1, reacts with oxygen according to the equation below.
2 C2H2Cl (9) + 5O2(g) + 4CO2 (g) + 2 H20 g) + 2 HCl (9)
What is the amount, in mol, of H2O produced when 10.0 mol of C2H3Cl and 10.0 mol of
O2 are mixed together, and the above reaction goes to completion?
08.00
10.0
04.00
20.0
Lo
Answer:
4.00 moles of water
Explanation:
The equation of the reaction is:
2 C2H2Cl (9) + 5O2(g) -------> 4CO2 (g) + 2 H20( g) + 2 HCl(g)
To find the limiting reactant, we find the species that yields the lowest number of moles of water.
From the reaction equation;
2 moles of C2H2Cl yields 2 moles of water
10 moles of C2H2Cl yields 10 * 2/2 = 10 moles of water
Similarly;
5 moles of oxygen yields 2 moles of water
10 moles of oxygen will yield 10 *2/5 =4 moles of water
Hence oxygen is the limiting reactant.
10 moles of oxygen yields 4 moles of water.
4. Advection fog forms when warm moist air comes in from the Pacific Ocean and
blows over the cold California current.
A.True
B.False
Answer:
A, True
Explanation:
How does a scientific theory compare to a scientific law?
Answer:
Explanation:
Scientific theory is an in-depth explanation of the observed phenomenon. A law is a statement about an observed phenomenon or a unifying concept.
10.0 J of energy is required to increase the temperature of 1 g of water by 10oC. What is this value in calories? In kcal?
10 J = 2.39 cal = 2.39 x 10⁻³ kcal
Further explanationThe joule is one unit of energy. energy itself can be expressed in units such as calories, BTU, kg⋅m²s⁻²
An example of energy calculation is the calculation of heat in heat transfer
Heat can be calculated using the formula:
Q = mc∆T
Q = heat, J
m = mass, g
c = specific heat, joules / g ° C
∆T = temperature difference, ° C / K
10 J if we convert into calories and kcal
[tex]\tt 1~J= 0.239~cal\\\\10~J=2.39~cal\\\\2.39~cal=2.39\times 10^{-3}~kcal[/tex]
How long will it take for 500.0g of radium decay to 2.0g
How many individual orbitals does carbon use for all of its electrons? Remember, there are two electrons in each filled orbital
Answer:
Three orbitals
Explanation:
The electronic configuration of carbon is given as follows;
1s²2s²2p²
Therefore, out of the six electrons of the carbon atoms, 4 fill the 1s and 2s orbitals with 2 electrons each, while the two remaining electrons are situated in the 2p orbital, with the electrons in the 2p orbital will remain unpaired such that they will have similar quantum numbers in accordance with Pauli exclusion principle.
Sulfur is often found in nature as an element, not combined with other elements in a compound. What does
this fact tell you about the reactivity of sulfur?
Answer:
sulfur is not a highly reactive element under ordinary conditions
Explanation:
PLEASE HURRY!!!
If a substance has a high PH, it will feel__________.
If a substance has low PH, it will taste__________.
Answer:
high ph -basic,low pH -acidic
Explanation:
hi I'm from India nice to meet you
Identify each of the changes listed below as chemical or physical.
Evaporation of Water ________________
Digesting Food ______________________
Rotting Wood ______________________
Rusting Car ______________________
Drying Clothes ______________________
Souring Milk ______________________
Baking a Cake ______________________
What is your carbon footprint?
the amount of carbon dioxide you use when recycling
the amount of oxygen put into the atmosphere due to your consumption of fossil fuels
the amount of carbon dioxide and oxygen in the atmosphere at any given time
the amount of carbon dioxide put into the atmosphere due to your consumption of fossil fuels
Answer:
c. .....................
Answer: the amount of carbon dioxide put into the atmosphere due to your consumption of fossil fuels
Your carbon footprint is the amount of carbon dioxide and other carbon compounds emitted, because of your use of fossil fuels.
Hope this helps!
A graduated cylinder is filled to 10.0 mL with water and a piece of granite is placed in the cylinder displacing the level to 23.7mL . what is the volume of the granite piece in cubic centimeters?
Answer:
13.7 cubic centimeters
Explanation:
23.7-10=13.7mL
Which H2S molecule’s dipole moment is correctly labeled?
I think the answer is option B.
we have that from the Question"Which H_2S molecule’s dipole moment is correctly labeled?" it can be said that
H_2S molecule’s dipole moment is correctly labeled at Option B
From the Question we are told
Which H_2S molecule’s dipole moment is correctly labeled?
Generally
H_2S,Hydrogen sulfide this as seen is a compound mad up of two molecules of Hydrogen and an atom of sulfur
It is a good signalling agent as it properties reveal
We have that
In labeling H_2S ,We its positive dipoles on both ends and arroe faces upward
Therefore
H_2S molecule’s dipole moment is correctly labeled at
Option B
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pls help me, ill mark brainliest and give 5 stars
Answer:
Decomposition!
Answer:
ayo sooooo roasie how did u get ur mindreading superpowers cuz u read my mind when i was ab answer
Explanation:
Which ecosystem is the least stable?
Answer:
tundra bc it has barley any food source and has vary little inhabitants
Explanation:
Answer:
a patch of lichens on bare rock
defines chemical fertilizers?
Answer:
MKS and CGS system of measurement are widely used and are considered easier too because most of the object that we use in our daily life are smaller in size which is easily measured MKS and CGS system. Physical quantity: Those quantities which can be measured are known as physical quantity.
Explanation:umm
Balance the following chemical equations.
1. Fe + 02 → Fe3O4
2. Sr+ 02 → Sro
3. Sn+ NaOH → Na SnO2 + H2
4. K + Br2 → KBr
5. CH3 + O2 + CO2 + H2O
Which element is metal?
iron, lead, gold, aluminum, platinum, uranium, zinc, lithium, sodium, tin, silver, etc
Answer: Gold.
Silver.
Iron.
Copper.
Nickel.
Aluminum.
Mercury( Liquid metal)
Titanium.
more metals...
Explanation: There are many kinds of metal elements including the ones above. In total, there are about 98 metals in the Periodic Table out of the 118.
Calorimetry Gizmo
The answer for Calorimetry Gizmo this lab is hard to find answer but I just save you so yeah :)
Answer:
The answer is JEDDBDDD
Explanation:
