Answer:
A. an increase in boiling point
Explanation:
A decrease in vapor pressure will cause an increase in the boiling point of a substance.
An increase in vapor pressure will decrease the boiling point.
Vapor pressure is a measure of the tendency of a liquid to change into gaseous form. The boiling point is the temperature at which the vapor pressure equals the atmospheric pressure. When vapor pressure reduces, there would be an elevation of the boiling point. This is why pressure cookers causes water to boil faster because they lower the boiling point.There are how many electrons in 1 neutral atom of copper?
A.
18
B.
29
C.
34
D.
26
PLZ ANSWER
Answer:
B-29
Explanation:
Since there are 29 positive charges in the nucleus, there must be 29 negative charges. And cause the atomic number of copper is 29.
Rock salt mixed with ice actually lowers the temperature of the salt/ice mix. Physical or chemical property?
Answer:
chemical
Explanation:
Salt changes the chemical makeup of the water and allows it to get colder than what it would normally freeze at.
A small motor does 4000 J of work in 20 s. What is the power of the motor in watts?
Answer:
200 W
Explanation:
Formula of Power is
P= W/T
where
W= Work and T= Time
so
4000/20 = 200J/s or 200 W
Based on the chemical equation, use the drop-down menu to choose the coefficients that will balance the chemical equation:
( )O2->( )O3
1 1
2 2
3 3
Its one of the numbers for each blank space inside the parenthesis
Answer: (1)CaSO4 -> (2)O2 + (1)CaS
Explanation: edge 2020 chem
Element j has 27 protons and 86 neutrons. element l has 27 protons and 83 neutrons. what are j and l
Answer:
Cobalt
Explanation:
The number of protons in an atom is called the atomic number.
Atomic number of an element is used by chemists to determine the element. The periodic table for example is based on the atomic number of elements.
Since both given elements have a proton number of 27, they are both the same element.
We simply check the periodic table for the element whose atomic number corresponds to this.
The element here is Cobalt.
What differs between the two of them is that they are different isotopes.
Place following elements in order from largest to smallest atomic radius. S, P, Na, Rb, Cl
Answer:
Rb>Na>P>S>Cl
Explanation:
In a group from up to down the atomic radius increases
In a row from left to right the atomic radius decreases.
Please help me ASAP!
Answer:
It would be better if you posted the question, thank you.
Explanation:
42. Proton and electuron.
Puroton
Electron.
Differences between proton and electron in two points
Answer:
Protons:
- positive
- aka cation
- in the nucleus along with the neutrons
Electrons:
- negative
- aka anion
- situated in the orbital shells/configuration levels (there are many names)
How much power, in watts, is needed to cut a lawn in 50 min if the work involved is 100,000 J?
Answer:
33.33 Watt
Explanation:
we know that P= W/t
W= work
t= time (in seconds)
so here
W= 100,000J
and t= 50 min= 50×60 sec= 3000 s
so P= 100,000/ 3000
=100/3 = 33.33Watt
What is the electron configuration of Iron
The electron configuration of Iron is:
[Ar] 3d⁶4s²
What is the density of a solid that has a mass of 100g and a volume of 25mL.?
Answer:
D = 4 g/mL
General Formulas and Concepts:
Density = Mass over Volume
D = m/VExplanation:
Step 1: Define
m = 100 g
V = 25 mL
D = unknown
Step 2: Find D
Substitute: D = 100 g/25 mLEvaluate: D = 4 g/mLwhat is the most reactive metal in Period 4 of the periodic table?
Answer:
Potassium
Explanation:
what is deposition ?
The act of depositing material, especially by a natural process; the resultant deposit.
Answer:
the act of deposing someone especially a monarch
How many grams of chlorine can be produced by the electrolysis of sodium chloride solution
Fe²O³ + 3CO --> 2 Fe + 3CO²
calculate the mass of chlorine that can be formed from 50g of sodium chloride
Answer:
Therefore,900 C of charge produce produce chlorine=(71g)(1.93×105C)×(900C)=0.331g.
Explanation:
Follow me..........
Carbon dioxide consists of a central carbon atom with an oxygen atom on each side. Draw a model of the molecule formed by putting lines between the atoms to represent bonds so that each atom has the correct number of bonds.
Explanation:
Structure of Carbon dioxide is in the attachment.
Here,
Hybridization of Carbon is sp
Bond angle 180°
Structure = linear
Single bond consists of sigma bond. Double bond consists of one sigma and one pie bonds. Triple bond consists of one sigma and two pie bonds.Answer:
O=C=O
Explanation:
this is all you need
PLEASE FASTER THIS IS DUE DATE, create an hypothesis for the increase in CO2 levels and the affect on crop plants
Answer:
The increase in CO2 will affect crop plants by causing in increase in global warming and therefore, will stunt plant growth and cause excessive heat to kill the plants.
Explanation:
Hope this helps! xoxo
H2O oxidation number
Answer:
2 ^0
Explanation:
Answer:
0
Explanation:
Water doesn't really have a charge
The atomic number of an atom with 14 neutrons and a mass of 27 is
27
1
13
Answer:
13
Explanation:
The mass number of an atom is the sum of the number of protons and neutrons.
27 = protons + 14
protons = 13
The number of protons is equal to the atomic number.
Answer: 41 or Niobium
Explanation: To get the number of Protons or Electrons given the number of Neutrons and Mass, you have to add the given numbers. This gives the number of Protons and Electrons which is the same number as the Atomic number. So, 14 Neutrons plus the mass of 27 is equal to 41, which gives the element Niobium
I need helpppppppppp
how many grams of magnesium are in 7.43 x 10 to the 22 atoms of mg
Mass of Mg=3 g
Further explanationThe mole is the number of particles contained in a substance
1 mol = 6.02.10²³
mol Mg in 7.43 x 10²² atoms :
[tex]\tt \dfrac{7.43\times 10^{22}}{6.02\times 10^{23}}=0.1234[/tex]
mass Mg
[tex]\tt mass=mol\times MW\\\\mass=0.1234\times 24.3=2.99\approx 3[/tex]
Which of the following are subatomic particles that orbit the outside of an atom?
A.
molecules
B.
electrons
C.
neutrons
D.
protons
When the temperature of substance
decreases, what happens to the
substances thermal energy?
Explanation:
When a substance is heated, it gains thermal energy. Therefore, its particles move faster and its temperature rises. When a substance is cooled, it loses thermal energy, which causes its particles to move more slowly and its temperature to drop.
When the temperature of a substance is increased, i.e., if you double the Kelvin temperature of a substance, you double the average kinetic energy of its molecules. When the average kinetic energy of the molecules goes up (a rise in temperature), the average speed of the molecules increases.
Quinton answer me or I will never talk to u again pls
Answer:
huh
Explanation:
6. Classify each compound as ionic or molecular based on its properties.
Substance Melting Point Solubility Conductivity Classification
1 -55 oC poor poor
2 396 oC good good
3 0 oC not tested poor
4 200 oC good good
5 20 oC good poor
Answer:
1. c
2. ionic
3. c
4. ionic
5. alloy or ionic
Explanation:
The compound classification.
The compounds are classified as per several different criteria and one common elements is the specific element that is present this makes it an iconic or a molecular. The presence of the oxides, hydrides, and various atomic groups.
Hence the answer is melting point to conductivity classified as c, iconic, c, iconic, and alloy.
A poor conductor of electricity will have a conductivity classification of c. The 396 good conductors will be iconic and a 0 C not teste will have a conductivity of c. The 200 C of good conductor will be iconic and 20 C of good conductor will be alloy or iconic.Learn more about each compound as.
brainly.com/question/3110085.
please help!!! based on the lewis /electron dot representation of the two atoms predict the ratio of metal
Answer:
The answer is 1:2 option B
Plz mark as brainliest............. hope it helps
The ratio of the metal cationic atom to the nonmetal anionic atom will be 1 :2. Therefore, option B is correct.
What is the lewis electron dot diagram?A lewis electron dot representation is utilized to represent the number of bonds, the bonding atoms, and the lone pairs on the atoms in the molecule or chemical compound.
Straight lines are used to represent the bond between atoms that are bonded to one another and excess electrons are represented as dot pairs to show the lone pairs on the atoms.
In the given image, calcium has two valence electrons and Fluorine needs one electron to complete its octet. So the calcium will donate its two electrons to two F. Each Flourine will accept one electron Therefore, the compound formed will be CaF₂.
Therefore, the ratio of the calcium cationic atom to the Fluorine anionic atom will be 1 : 2.
Learn more about the lewis dot diagram, here:
brainly.com/question/14091821
#SPJ2
put them in order the right way like the question says. get correct for brainleist! :)
Answer:
Fall or autumn
Explanation:
A substance conducts an electric current when it is in the liquid state what would the conduct Tivitt he of the substance in the silage form indicate about the type of bond in the substance
Answer:
This question is incomplete
Explanation:
This question is "lacking" in some words. A substance that conducts electric current when in it's liquid state is an electrovalent or ionic compound and the type of bond present in this substance is electrovalent or ionic bond. This is the type of bond that involves the transfer of electron(s) between constituent atoms. One major characteristic of these substances is that they conduct electric current when dissolved in water. Examples include NaCl and KBr
what do the suffix in a polyatomic ion mean
Answer: The suffixes of the names of polyatomic ions have a pattern associated with them. ... For example, the sulfite ion has three oxygen atoms whereas the sulfate ion has four oxygen atoms.
what is true of a brønsted-Lowry base?
Answer:
the answer is a please check
How many moles of Mg2+
are in 6.4 X1022 ions?
Answer:
0.11 molesExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\[/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
[tex]n = \frac{6.4 \times {10}^{22} }{6.02 \times {10}^{23} } \\ = 0.10631229...[/tex]
We have the final answer as
0.11 molesHope this helps you
