Answer: D A laser system............
Explanation:
Answer:
O B. A laser system developed by NASA to help spaceships dock with
space stations was later adapted to help doctors perform eye
surgery.
Explanation:
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.
___________ elements are naturally unstable as they break down over time to more stable forms.
Answer:
Radioactive elements
Explanation:
how to convert 12g of nitrogen gas in mole
Answer:
it takes more than 12g of nitrogen gas to make a mole
Answer:
0.86 mol N
Explanation:
To convert between grams and moles, you need the molar mass of the substance. The molar mass of nitrogen is 14.01g/mol. This is used as the unit converter.
[tex]12gN*\frac{1molN}{14.01gN} = 0.85653 mol N[/tex]
Then round the answer to the lowest number of significant figures = 0.86 mol N.
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
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
What is involved in weathering?
Answer:
the answer is water.Hope this helps
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:
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
is it true that the atomic radius of A1 is greater than the atomic radius of In ?
Answer:
Yes
Explanation:
Yes it is true
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.
How do spores help the survival of spore-bearing plant?
Answer:
When weather conditions are ideal, some ferns, algae, moss,and even fungi, release spores into the air, often carried by the wind, by insects or birds until they land. Spores contain both male and female reproductive organs, which allows these plants to replicate themselves in a form of cloning.
Explanation:
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
change word equation into chemical equation.
a Calcium carbonate -----> Calcium oxide + Carbon dioxide
b Zinc + Sulphuric acid -----> Zinc sulphate + Hydrogen
Answer:
Ca(CO3) --> CaO + CO2
Zn + H2SO4 --> ZnSO4 + 2H2
Explanation:
^^^
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
For more information on this visit
https://brainly.com/question/2141685
The way that light waves interact with different mediums is called the ____________
Does anybody understand this I’m stuck
Answer:
it's the first one
Explanation:
can you help me too
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:
A reef that surrounds a volcanic island is an
Answer:
atoll
Explanation: this is correct, pls give me brainliest
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
The characteristic bright–line spectrum of potassium is produced when electrons
A) jump to higher energy levels
B) return to lower energy levels
C) are lost by neutral potassium atoms
D) are gained by neutral potassium atoms
E) are released from the nucleus
Answer: B.
Explanation:
When the electron changes levels, it decreases energy and the atom emits photons. The photon is emitted with the electron moving from a higher energy level to a lower energy level. The energy of the photon is the exact energy that is lost by the electron moving to its lower energy level.
Hope this helps!
A substance absorbed 895 J and caused its temperature to increase by 10 ºC. If the substance has a mass of 27.9 g, what is the substance's specific heat in J/(gºC) ?
1.) 3.21
2.) 4.62
3.) 1,406.25
4.) 249,705
Answer:
i dont get the equation sorry wish i can help
Balance the following chemical equations
Answer:
1) 3Fe + 2O(2, this is the subscript) - Fe(3)O(4)
2) 2Sr + O(2) - 2SrO
3) Sn + 2NaOH - Na(2)SnO(2) + H(2)
4) 2K + Br(2) -2KBr
5) 2C(8)H(18) + 25O(2) - 16CO(2) + 18H(2)O
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.
Find more information about Neutrons here:
brainly.com/question/26226232
please help me.......
Answer:
D as in :D lol
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]
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.
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 ______________________
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:
Which of the following land- forms is the result of wind depo- sition? a. deflation hollow b. desert pavement c. dune d. abrasion
Answer:
Coastal regions are often affected by abrasion. What process would cause increased abrasion along a costalregion? Abrasion is physical weathering caused by water, wind and gravity. The coastal regions areaffected by abrasion due to large volumes of water and increasedwinds.
Explanation:
I I hope this answer is Wright
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.
