uhm they use gas/fuel to run
2. When an atom loses an electron, it becomes a
_a._positive ion.
c. neutral ion.
b. negative ion.
d. neutral atom.
Answer:
A
Explanation:
Atoms of elements can lose or gain electrons making them no longer neutral, they become charged. A charged atom is called an ion. When an atom loses electron(s) it will lose some of its negative charge and so becomes positively charged. A positive ion is formed where an atom has more protons than electrons.
How many atoms are in 12 moles of silver?
Answer:
NA=72.264x1023
Explanation:
I got you
During combustion what type of chemical reaction takes place
Which of the following is an example of erosion in action?
a) Rock on the edge of river
b) Soil material being moved downstream carried by water
c) A desert valley
d) A tree growing next to a lake
Answer:
b) Soil material being moved downstream carried by water
Explanation:
Erosion can be defined as a geological process which typically involves the wearing out of earthen (soil) materials and the transportation of these materials by natural forces like water, wind, etc. Soil erosion is greatest when the soil is steep.
The steepness of a body such as river or stream refers to the downward slope or gradient of the body of water.
Generally, the steepness of a body affects the rate at which other materials would flow or move around. Thus, the steeper a river or stream, the greater would be its rate of erosion.
An example of erosion in action is soil material being moved downstream carried by water.
Definition surface water
Answer:
Surface Water - water that collects on the surface of the ground. Hope it helped!
Answer: surface water is when water is located of top of the Earth for example rivers, creeks, and wetlands.
What type of wave occurs on a guitar because both ends are fixed?
O A. destructive
O B. constructive
C. standing
D. musical
Answer:
Destructive
Explanation:
A chemist is identifying the elements present in a sample of a sea water. What characteristics of an element's
atoms always determines the element's identity?
A.
B
C.
D
The number of protons
The number of neutrons
The location of valence electrons
The number of valence electrons
Answer:
The number of valence electrons
What type of stress results when two plates converge? Compression Shear Hot spot
Answer:
Compression
Explanation:
Hi! When two convergent plates collide, they should create compressive pressure, or compression.
What happens to the mass of a substance when it is heated, cooled, or mixed with other substances?
Answer:
the total weight of matter is conserved.
Explanation:
:)
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The molar masses of four unknown gases are shown in the table.
Molar Mass of Unknown Gases
Gas Molar Mass
A 44 g/mol
B 20 g/mol
C 30 g/mol
D 32 g/mol
Which gas is likely to have the lowest rate of diffusion?
a. Gas A
b. Gas B
c. Gas C
d. Gas D
a. Gas A has the lowest rate of diffusion
Further explanationGiven
The molar masses
Required
the lowest rate of diffusion
Solution
Graham's law: the rate of effusion of a gas is inversely proportional to the square root of its molar masses or
the effusion rates of two gases = the square root of the inverse of their molar masses:
[tex]\rm \dfrac{r_1}{r_2}=\sqrt{\dfrac{M_2}{M_1} }[/tex]
So :
[tex]\tt r\approx \dfrac{1}{\sqrt{M} }[/tex]
The greater the molar mass, the smaller the rate
So gas A has the lowest rate
Balance this equation-
Fe + O2 Fe3 O4
silver bromide (AgBr) has a solubility of 7.07 × 10^-7 mol/L
a. write the dissolution reaction of Abraham, including all states.
b. write the expression for ksp for AgBr
c. calculate the solubility product constant of AgBr
a. AgBr(s)⇒ Ag⁺(aq) + Br⁻(aq)
b. Ksp AgBr = s²
c. 5 x 10⁻¹³ mol/L
Further explanationGiven
solubility AgBr = 7.07 x 10⁻⁷ mol/L
Required
The dissolution reaction
Ksp
The solubility product constant
Solution
a. dissolution reaction of AgBr
AgBr(s)⇒ Ag⁺(aq) + Br⁻(aq)
b. Ksp
Ksp AgBr = [Ag⁺] [Br⁻]
Ksp AgBr = (s) (s)
Ksp AgBr = s²
c. Ksp AgBr = (7.07 x 10⁻⁷)² = 5 x 10⁻¹³ mol/L
What is the main difference between physical and chemical changes
versus nuclear changes? *
A.Nuclear changes do not involve the subparticles- protons, neutrons, or electrons.
B.Nuclear changes release less energy than chemical and physical changes.
C.Nuclear changes result in the formation of a different element while physical and
chemical changes involve the same elements from start to finish.
D.There are no differences.
Answer:
B
Explanation:
Because nuear changes release less negeyr than a chmeicsl and phsycial change
the element found in group iiia and in period 2 is called
Answer:
Boron
Explanation:
The group III A is also known in the periodic table as group 13. The members of the group begin to appear in the second period.
At the beginning of this group III A is boron. Boron is a member of group III A as well as a member or period 2.
Boron is a metalloid and has only three valence electrons as other group III A elements.
Convert this temperature from °F to °C. Explain how pls?
-2.2 C
10.6°C
2.2°C
33.3°C
Answer:
Start with the temperature in Fahrenheit (e.g., 100 degrees).
Subtract 30 from this figure (e.g., 100 - 30 = 70).
Divide your answer by 2 (e.g., 70 / 2 = 35).
Which would aid a student in preparedness for a lab?
O using a fire extinguisher if there is a fire
O reading the lab manual before class
O telling the teacher about a chemical spill
O cleaning up after the lab
Answer: cleaning up after the lab, D.
Explanation:
Choose the correct missing coefficient to balance the following equation:
___NO + O2 ---> 2NO2 *
1
2
3
4
Answer:
the answer is 2 hope this helps
please help this is for a really big grade thanks whoever gets it correct will be given brainliest and 50pts
Answer: Humans have increased the global temperature due to fossil fuel burning and are negatively contributing to the increase of CO2 emissions and greenhouse gases.
Explanation:
#1 Over the past century humans have negatively impacted the environment by increasing the global temperature due to fossil fuel emissions and a steady increase in the human population which has led to more resources being extracted and used.
#2 Human activities have brought a sudden increase in the global temperature recently due to the increase in greenhouse gas emissions from factories, automobiles, and homes. While we are beginning to use renewable resources, a large portion of our energy consumption still comes from the production and burning of fossil fuels.
#3 Some ways we can start to put a stop to global warming are by using renewable energy resources and decreasing the use of fossil fuel emissions. We can also decrease our carbon footprint by using electric powered vehicles and devices instead of petroleum burning automobiles and home appliances, and by riding bikes and walking over short distances.
Note: Please reword this a bit so you don't get in trouble for plagiarism.
PLS HELP MEEEEEEEEEEEE
Answer:
108- Hassium
11- sodium
56- Barium
92- uranium
25- manganese
103- lawrencium
10- neon
22- titanium
8- oxygen
14- silicon
32- germanium
39- yttrium
Potassium permanganate (KMnO2) is used as an explosive agent. How
many moles are there if we have 105.66 grams of potassium
permanganate?
Answer:
0.67mole
Explanation:
Given parameters:
Mass of potassium permanganate = 105.66g
Unknown:
Number of moles = ?
Solution:
To find the number of moles of the given compound;
Number of moles = [tex]\frac{mass}{molar mass}[/tex]
Molar mass of KMnO₄ = 39 + 55 + 4(16) = 158g/mol
Number of moles = [tex]\frac{105.66}{158}[/tex] = 0.67mole
What method would a geologist use to determine the approximate age of a rock found in a newly discovered formation?
b. How many grams of CO2 are produced from 36
grams of CH4?
Answer:
Ch4 G +2o2 g co2 G +2h2o g How many moles of methane are required to produce 22 g co2 G after combustion
Explanation:
it's 22 grams..
hope the answer was helpful ....
Which electron configuration is magnetic, paired or unpaired electrons
Answer:
paired electrons is magnetic configuration
The radii of the atoms become smaller from sodium to chlorine across period 3. This decrease is primarily a result of
Answer:
Nuclear Charge
Explanation:
As we move from sodium to chlorine across, there's increase in atomic number (protons). This also means there is increase in the valence electrons (The valence electrons is denoted by the group).
As the number of protons increases, the nuclear energy also increases. Due to this, the electrons are attracted more strongly and pulled closely to the nucleus.
Where does the energy required to break the interactions between butane molecules come from when butane boils?
Answer:
The properties of liquids are intermediate between those of gases and solids, but are more similar to solids. In contrast to intramolecular forces, such as the covalent bonds that hold atoms together in molecules and polyatomic ions, intermolecular forces hold molecules together in a liquid or solid. Intermolecular forces are generally much weaker than covalent bonds. For example, it requires 927 kJ to overcome the intramolecular forces and break both O–H bonds in 1 mol of water, but it takes only about 41 kJ to overcome the intermolecular attractions and convert 1 mol of liquid water to water vapor at 100°C. (Despite this seemingly low value, the intermolecular forces in liquid water are among the strongest such forces known!) Given the large difference in the strengths of intra- and intermolecular forces, changes between the solid, liquid, and gaseous states almost invariably occur for molecular substances without breaking covalent bonds.
Explanation:
im not sure this is what your looking for but i found this
Scientific notation
1.9 x 10^3 + 2.3 x 10^4
What kind of reaction is this?
1. Synthesis
2. Decomposition
3. Single Replacement
4. Combustion
5. Double replacement
6. Acid-Base
Answer:
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If 525 N of force is applied to a 4.5
kg mass, how fast will it accelerate?
Answer:
121.11m/s²
Explanation:
Given parameters:
Force = 525N
Mass = 4.5kg
Unknown:
Acceleration = ?
Solution:
From Newton's second law of motion, we can find the solution to this problem. Using the expression below:
F = m x a
F is the force
m is the mass
a is the acceleration
So'
525 = 4.5 x acceleration
Acceleration = 121.11m/s²
Describe a method to investigate how the temperature changes when
different masses of ammonium nitrate are dissolved in water.
You do not need to write about safety precautions.
(6marks)
Answer:
Decrease temperature with increase in ammonium nitrate concentration.
Explanation:
The temperature changes when different masses of ammonium nitrate are dissolved in water because the ammonium nitrate takes energy from the surrounding water environment for the breaking of ionic bonds as a result the temperature of water decreases. When more concentration of ammonium nitrate is added to water, more decrease occur in temperature of water and the water becomes cold.
Hotness or a cold state of a substance or a solution is measured physically by temperature. It is measured by a device called a thermometer and can be in the form of Kelvin, degree Celsius or degree Fahrenheit.
Decreasing the temperature with an upsurge in the ammonium nitrate concentration can be used in determining the change in the temperature.
The change can be explained as:The alteration in temperature can be seen after adding more ammonium nitrate with various concentrations to the water.Ammonium nitrate accepts energy from the water present in its surrounding solution for splitting the ionic bonds present.This energy acceptance from water reduces the temperature of the water and with the increase in concentration lowers the water temperature more.Therefore, increased concentration reduce temperature.
Learn more about temperature and here:
https://brainly.com/question/17203760