Select the correct answer. When a candle burns, which forms of energy does the chemical energy in the candle change to?, A. light and sound, B. heat and sound, C. light and heat, D. electric and light answer?
Answer:
B heat
Explanation:
manganese atom has 30 neutrons and atomic number 25
determine the electron cloud charge of manganese
Answer:
25
Explantion:
atomic no. = no. of eletron
Convert each into decimal form. a) 1.056 x 10-3 b) 0.560 x 102
Answer:
A. 7.56
b. 57.12
Explanation:
Hope that's right have a nice day :)
Which 1-mole sample of atoms requires the least energy to form a mole of positive ions? 1) Ca 2) Ge 3)K 4)Ga
Answer:
K potassium have least ionization energy among these four
Explanation:
Ionization energy values are given in kilo joule per mole
Ca 590
Ge 762
K 419
Ga 579
From above data we can understand stand K has least and Ge has highest ionization energy
a science fair volcano bubbles and fizzes. what is taking place?
A. solid formation
B. gas formation
C. color change
PLEASE HELP ASAP
Which two reactions are slower than the others?
A. Silver tarnishes in air that contains hydrogen sulfide.
B. Lead nitrate and potassium iodide react to form a yellow
precipitate.
C. Black powder in fireworks burns explosively to produce white
light
D. Iron metal reacts with oxygen in air to form rust.
Answer:
A and D takes much slower
Explanation:
Here, we want to select, out of the four given reactions, the one that is slower than the other two
The answers in these case are reactions 1 and 4 ( A and D)
The two reactions show what is called rust (as directly seen in reaction 4)
When we speak of rust, we simply mean a reaction that occurs over time
For example, non coated roofings of houses doesn’t get to change color at an instant
The color degradation that occurs is something that takes some time from the initial time they were used to roof the house
Hence, from these analogy, we can see that these reactions need an an external support to thrive or to come into existence
These external supports are natural forces and they contributing efforts occur over time and cannot be seen immediately
These reactions are thus ones that take much slower time than conventional laboratory reactions in the case of the formation of the precipitate or a reaction that requires a low flash point temperature such as that of black powder to produce such explosive effects
So in conclusion, what we are saying is that the two selected reactions are subjected to the availability of some conditions and may take time to manifest and these absolutely differentiates them from reactions that are spontaneous such as the one having an explosive effect or the other one leading to the formation of a precipitate which takes far less times
Order the following elements from Highest to Lowest Electronegativity.
K, Sc, Ca, Zn, Br
Sc, K, Br, Zn, Ca
OK, Ca, Sc, Zn, Br
O Br, Zn, Sc, Ca, K
Ca, Zn, Br, K, SC
Answer:
O, Ca, Zn, Br
Sc, K, Br,
Explanation:
The correct order of the chemical elements from highest to lowest electronegativity is: C. Br, Zn, Sc, Ca, K.
Electronegativity refers to a measure of the ability of an atom of a chemical element to attract any shared pair of electrons.
Generally, the electronegativity of a chemical element typically increases across the period from left to right.
In Chemistry, the electronegativity of some of the chemical element are:
Bromine (Br) = 2.96Calcium (Ca) = 1.0Zinc (Zn) = 1.65Potassium (k) = 0.82Scandium (Sc) = 1.36Hence, the order of the chemical elements from highest to lowest electronegativity is:
1. Bromine (Br) = 2.96
2. Zinc (Zn) = 1.65
3. Scandium (Sc) = 1.36
4. Calcium (Ca) = 1.0
5. Potassium (k) = 0.82
Read more: https://brainly.com/question/18214726
An object has a gravitational potential energy that is 800 Joules. Its
height above ground is 2.25 meters. What is its mass?
Answer:
36.28 kg
Explanation:
Given data:
Gravitational potential energy of object = 800 J
Height from ground = 2.245 m
Mass of object = ?
Solution:
Formula:
P.E = mgh
g =acceleration due to gravity = 9.8 m/s²
by putting values,
800 J = m× 9.8 m/s² ×2.25 m
J = kgm²/s²
800 kgm²/s² = m× 22.05 m²/s²
m = 800 kgm²/s² /22.05 m²/s²
m = 36.28 kg
What is the chemical name of the compound K2SO4? Use the list of polyatomic ions and the periodic table to help you answer.
A. Dipotassium sulfate
B. Potassium sulfate
C. Potassium (||) sulfate
D. Potassium sulfide
Answer:
B. Potassium Sulfate
Explanation:
SO4=sulfate
-2 charge cancels
Answer:
B. Potassium Sulfate
Explanation: for clever users /plato
EASY Chemical reactions
Balance and classify
Answer:
double replacement
synthesis
double replacement
i think this one is decomposition
synthesis
double replacement
single replacement
single replacement
double replacement
single replacement .....
hopefully i help
What is the molecular formula of sodium peroxide by criss cross method
Answer:
Na2O2
the formula of sodium peroxide
What actions can you take to reduce your impact on the environment?
Answer:
Use energy more efficiently. Producing electricity and natural gas and delivering it to your door generates greenhouse gas emissions. ...
Install renewables. ...
Conserve water. ...
Reduce, reuse, recycle. ...
Travel less. ...
Consider near sourcing. ...
Ship goods more efficiently.
Completely turn off equipment like televisions and stereos when you're not using them.
Choose energy-efficient appliances and light bulbs.
Save water: some simple steps can go a long way in saving water like, like turning off the tap when you are brushing your teeth or shaving.
Answer:
don't use power when it's not needed
Explanation:
if you use it wisly then less of it is needed to be made to power your things
What is the mass of Li-6 or Li-7
Answer:
mass number- 7 (round it to 7
Explanation:
which element has 4 energy levels and 7 valence electrons
Answer:
Beryllium 4 2
Boron 5 3
Carbon 6 4
Nitrogen 7 5
Get me the answers please
Answer:
a is a opinon answer
Explanation:
Answer:
a. opinion
Explanation:
How do the particies in a liquid create surface
tension?
It's been a while since I've taken Chemistry but here's what I know:
There are small, weak bonds that form between water molecules. These bonds make it so liquid molecules (water, in this example) cannot move as freely as a gas, but their bonds aren't nearly as strong as a solid. The bonds are formed when a hydrogen atom is attracted to an oxygen atom (because they have an opposite charge). This bond plus the gas molecules hitting the water causes surface tension.
(Let me know if this is wrong and I hope you have a lovely day!!)
In 1945, the United States dropped an atomic bomb on the Japanese cities of Hiroshima and Nagasaki. This is an example of _______ negatively affecting history.
Scientific method
Expermentation
Science
Answer:
Science
Explanation:
Complete the chemical name of the compound Col3. Use the periodic table to help form your answer.
Type the correct answer in the box. Spell all words correctly. Use parentheses where appropriate.
Answer:
Cobalt (III)
Explanation:
Since there is a 3 by iodine and cobalt is a transition metal it means cobalt has a 3 charge and we have to write it in roman numerals
Answer:
cobalt(III)
Explanation:
Do not capitalize
EXPLAIN the steps you would take to complete this conversion problem.
46 lb
1.
Х
1kg
2.2 lb
х
1,000 g
1kg
=_?
~I love Kuroo^^~
Answer:
Next, the lb will be canceled at 2.2 lb and the kg would be canceled at 1 kg. You cross, multiply, then. 46 x 1 x 1000 is 46000, only moving to the decimal point. 1 x 2.2 x 1 will stay the same, so you'd have 46000 over 2.2.
Explanation:
kuroo man <3
Answer:
Next, the lb will be canceled at 2.2 lb and the kg would be canceled at 1 kg. You cross, multiply, then. 46 x 1 x 1000 is 46000, only moving to the decimal point. 1 x 2.2 x 1 will stay the same, so you'd have 46000 over 2.2.
Explanation:
halo
How many particles would be found in a 12.7 g sample of ammonium carbonate?
Answer:
Answers. 7.8286×10²¹ particles.
Explanation:
The particles present in the sample of ammonium carbonate are [tex]0.7826*10^{23}[/tex] particles. This can be calculated by using number of moles.
Number of moles:It is defined as the given mass over molar mass.
Given mass= 12.7 g
Molar mass of ammonium carbonate= 96.06 g/mol
Number of moles = 12.7 g / 96.06 g/mol
Number of moles = 0.13 moles
One mole:
A mole is the amount (10) of material containing [tex]6.02214 * 10^{23}[/tex] particles.
1 mol = [tex]6.02214 * 10^{23}[/tex] particles
So, 0.13 moles = [tex]6.02214*10^{23}*0.13=0.7826*10^{23} \text{ particles}[/tex]
thus, there are [tex]0.7826*10^{23}[/tex] particles are present in 12.7 g of ammonium carbonate.
Find more information about One mole here:
brainly.com/question/1358482
What is the value for AG at 100 K if AH = 27 kJ/mol and AS = 0.09 kJ/mol.K)?
O A. AG = 2700 kJ/mol
B. AG = -36 kJ/mol
C. AG = 0 kJ/mol
D. AG = 18 kJ/mol
The value for ΔG = 18 kJ/mol
Further explanationGiven
ΔH = 27 kJ/mol and ΔS = 0.09 kJ/mol.K
T = 100 K
Required
the value for ΔG
Solution
The spontaneous process of a reaction is based on 2 factors :
enthalpy change ΔH decreases and entropy change ΔS increasesΔG=ΔH-T.ΔS
[tex]\tt \Delta G=27~kJ/mol-100\times 0.09~kJ/mol.K\\\\\Delta G=18~kJ/mol[/tex]
which of the following is the correct formula formed from the following ions? Na, Cl
Answer:
NaCl
Explanation:
I'm not sure how to really explain this... it's NaCl though.
Right answer gets brainlist
help please
manganese atom has 30 neutrons and atomic number 25
determine the electron cloud charge of manganese
Answer:
electron cloud charge of manganese=-5
Explanation:
atomic number=number of elecron +neutron number
DATA
Neutron NO.=30
atomic NO.=25
e=?
A=e+n
25=e+30
e=25-30
e= -5
Where do most earthquakes occur? Where do most volcanoes occur? Why do they occur here?
Answer:
The Ring of Fire, also referred to as the Circum-Pacific Belt, is a path along the Pacific Ocean characterized by active volcanoes and frequent earthquakes. The majority of Earth's volcanoes and earthquakes take place along the Ring of Fire
Explanation:
Answer:
Most earthquakes occur along the edge of the oceanic and continental plates. The belt exists along boundaries of tectonic plates, where plates of mostly oceanic crust are sinking beneath another plate.
Most volcanoes are found along a belt, called the “Ring of Fire” that encircles the Pacific Ocean. As the plates move, they spread apart, collide, or slide past each other. Sixty percent of all active volcanoes occur at the boundaries between tectonic plates.
How many moles are in a 24.022 g sample of Carbon (C)?
There are 2 moles in a 24.022 g sample of Carbon (C).
HOW TO CALCULATE NUMBER OF MOLES:
The number of moles of a substance can be calculated by dividing the mass of that substance by its molar mass. That is;no. of moles (mol) = mass (g) ÷ molar mass (g/mol)According to this question, a sample contains 24.022g of carbon.Molar mass of carbon = 12g/molno. of moles = 24.022g ÷ 12g/molno. of moles = 2.002Approximately, there are 2 moles in a 24.022 g sample of Carbon (C).Learn more at: https://brainly.com/question/20486415?referrer=searchResults
if a substance has a large mass and a small volume what can you conclude about?
A. it has a low density
B. it is very dense
C. it is made out of rock or metal
D. it will float on water
Explanation:
this answer is a substance has large MS and small volume that are recover Council cute about his sister and brother it has a low distinguish inside incensed a substance is thick and warm
I’ll marmark you brainlist
Hydrogen gas is trapped by water displacem ent in a test tube at 25 o C and left to sit until vapor -liquid equilibrium is reached. The total pressure of the trapped gas in th e test tube is 102.0 kPa. What pressure is exerted by the hydrogen gas that was trapped over water?
Answer:
Therefore, the pressure exerted by the hydrogen gas that was trapped over water is 108.8 kPa
Explanation:
The law of partial pressure by Dalton, in a mixture of gases which do not react chemically together, the total pressure is equal to the sum of the partial pressures of the individual gases.
According to this law, the total pressure exerted by the gases above the displaced water is equal to the sum of the partial pressure of water vapor and the partial pressure of hydrogen gas: Ptotal = pH₂ + pH₂O
Therefore, pH₂ = Ptotal - pH₂O
Vapor pressure of water at 37°C = 3.17 kPa; Ptotal = 102.0 kPa
pH₂ = (102.0 - 3.17) kPa
pH₂ = 98.8 kPa
Therefore, the pressure exerted by the hydrogen gas that was trapped over water is 108.8 kPa
A cross section of bone tissue is illustrated here. What statements accurately describe the cells shown here? You may select as many as are correct A) These cells form a type of connective tissue in the body B) This tissue can be found as compact on spongy in the body C) These cells have high concentrations of phosphate and calcium minerals D) The bone cells comprise a combination of nervous and muscular tissue in the body
Answer:
This question is incomplete
Explanation:
This question is incomplete because of the absence of the illustration (diagram or figure). However, general understanding of the bone cells can help answer the question.
Bone cells come together to form a connective tissue called bone. The bone is a connective tissue that contains cells and other substances. The bone assists in the storage of minerals, providing of support to the body, protecting internal organs and providing attachment for muscles and tendons. The bone can be either compact or spongy (cancellous). The spongy bone is lighter and less dense than the compact bone. The bone is primarily composed of a mineral called hydroxyapatite (made of calcium and phosphorus) but also contains other minerals (such as magnesium and sodium). Hence, the bone cells are also expected to have high concentration of the minerals of hydroxyapatite (calcium and phosphorus).
The bone cells cannot however comprise a combination of nervous and muscular tissue because a cell is the structural unit of life and cannot as such comprise of a higher structure. Thus, options A, B and C are correct.