Answer:
Solid turns to liquid and liquid to gas
Explanation:
ice cube to water, water to carbon
How do scientists write very large numbers?
O A. They divide all numbers by a constant to reduce the size.
O B. They round off all numbers to a few digits after the decimal.
O c. They simplify the numbers by deleting the exponents.
D. They express the numbers using scientific notation.
SUBMIT
Answer: its D
Explanation: i just got the question right
In scientific notation, often known as power-of-10 notation, extremely big and small numbers are written. Scientists write very large numbers by express the numbers using scientific notation.
What is scientific notation ?Numbers that are either too large or too little to be readily stated in decimal form can be expressed using scientific notation. It is also known as standard form in the UK and scientific form, standard index form, and standard form.
The main goal of scientific notation is to simplify computations using numbers that are abnormally big or tiny. The following examples demonstrate how all the digits in a number in scientific notation are relevant, since zeros are no longer utilized to set the decimal point.
When working with very big or very small numbers, scientists, mathematicians, and engineers employ scientific notation. Large and tiny numbers can be represented in a form that is simpler to read using exponential notation.
Thus, option D is correct.
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Which order shows decreasing wavelength?
gamma → ultraviolet → infrared → radio
infrared → gamma → radio → ultraviolet
radio → infrared → ultraviolet → gamma
ultraviolet → radio → infrared → gamma
Answer:
The answer is c radio --> infrared --> ultraviolet --> gamma
Explanation:
I just did it
Answer:
C
Explanation:
just did it
1-10 balancing reactions
PLEASE HELP :))
What type of reaction is shown below: Br2 + Kl 12 + KBr
Answer:Chemical reaction
Explanation:
The main concept that must be applied to determine the coefficients (amount of each item) is that there must be equal amounts of each element on each side of the equation. We are not destroying or creating new atoms. In this case, the unbalanced reaction formula is:
B
r
2
+
K
I
=
K
B
r
+
I
2
There are a two problems we need to solve before it will be balanced:
There are two moles of Iodine atoms (
I
) on the right side of the equation, while there is only one mole on the right side.
There are two moles of bromine (
B
r
) atoms on the left side, while there is only one on the right.
Since there are two moles of bromine atoms on the left side, we need two moles on the right as well. We can do this by adding a coefficient of two to the
'
K
B
r
'
term in the equation. Our now modified equation looks like this:
B
r
2
+
K
I
=
2
K
B
r
+
I
2
There is one mole of Iodine atoms on the left, and two on the right. To fix this, we add a coefficient of two to the
'
K
I
'
term. The resulting equation is below.
B
r
2
+
2
K
I
=
2
K
B
r
+
I
2
Bonus step: We can also put ones in front of the coefficient-less species. This is like changing a phrase from "an apple" to "1 apple". It is the exact same thing, but makes it a little more clear sometimes. This would like like this:
1
B
r
2
+
2
K
I
=
2
K
B
r
+
1
I
2
Can you see that there is now an equal amount of each element on each side of the equation? That means that it is balanced.
Answer: its a reduction and an oxidation reaction
Explanation:
In guinea pigs, the allele for a black coat is dominant over the allele for a white coat. What color is a guinea pig with one allele for a black coat and one allele for a white coat?
A.
black
B.
gray
C.
white
D.
black and white
A student has the following data recorded: final readings: 760. mm Hg, 6.0L, 197 'C. initial readings:
712 mm Hg, -76.9 °C. She calculates the initial volume to be -2.5 L. Is her answer correct? Explain why
or why not.
SOMEONE HELP ASAPP...
AnswU GOT THIS!!!!!!!!!!!!!
Explanation:
Answer:
protein??
Explanation:
im not sure, but I could be wrong!!
Welding is an industrial process that is used to join pieces of metal. A certain mixture of gases used in welding is composed of carbon dioxide and argon. The partial pressure of carbon dioxide is 0.080 atm and the partial pressure of argon is 0.24 atm
The given question is incomplete. The complete question is :
Welding is an industrial process that is used to join pieces of metal. A certain mixture of gases used in welding is composed of carbon dioxide and argon. The partial pressure of carbon dioxide is 0.080 atm and the partial pressure of argon is 0.24 atm. What is the total pressure of the mixture.
Answer: 0.32 atm
Explanation:
According to Dalton's law, the total pressure is the sum of individual pressures.
[tex]p_{total}=p_{CO_2}+p_{Ar}[/tex]
Given : [tex]p_{total}[/tex] =total pressure of gases = ?
[tex]p_{CO_2}[/tex] = partial pressure of carbon dioxide = 0.080 atm
[tex]p_{Ar}[/tex] = partial pressure of argon = 0.24 atm
putting in the values we get:
[tex]p_{total}=0.080atm+0.24atm[/tex]
[tex]p_{total}=0.32atm[/tex]
Thus the total pressure of the gases is 0.32 atm
My car has an internal volume of 3,600 L. If the sun heats my car from a temperature of 18.0 degrees Celsius to a temperature of 45.0 degrees Celsius, what will the pressure inside my car be? Assume the pressure a was initially 101.3 kPa.
Answer:
110.7 kpa or 1.097 atm your choice of pressure units
Explanation:
We can assume the Volume is constant since we are not told other wise and it is indeed a car. We can Use P1/T1= P2/T2
So (T2xP1 )/ T1 = P2
(318Kx101.3kpa)/291k = 110.7 kpa or 1.097 atm your choice of pressure units
if your wondering why i used Kelvin gas laws are always in units of Kelvin
Identify the type of reaction shown here.
2HgO → 2Hg + O2
Combustion
Decomposition
Synthesis
Single Replacement
Answer:
Decomposition
Explanation:
One reactant has formed two products
The diagrams below represent the four states of matter.
A number of blue balls are loosely packed in a container. A number of yellow balls are randomly distributed in a container.
Diagram 1 Diagram 2
A number of red balls are tightly and neatly packed in a container. A number of balls are positioned randomly in a container. Some are pink and labeled with a plus sign and some are blue and labeled with a minus sign.
Diagram 3 Diagram 4
Which diagram represents a gas that has been ionized?
diagram 1
diagram 2
diagram 3
Answer: Diagram 4
Explanation: Diagram 1 represents a state in which particles are closely packed , thus cannot be a representation of gas.
Diagram 2 represents a state in which particles are loosely packed , thus can be a representation of gas.
Diagram 3 represents a state in which particles are closely packed , thus can be a representation of a solid.
Diagram 4 represents a state in which particles are loosely packed , thus can be a representation of gas. It also represents the particles in ionized form. Particles are existing as ions bearing positive and negative charges.
Explanation:
Answer:
D
Explanation:
How many atoms of Hydrogen are in 4 C3H5O12? (10 points)
Answer:
There are 20 atoms in hydrogen.
Explanation:
Multiply Coefficient with Hydrogens subscript. In this case the coefficient is a 4 so you multiply that with Hydrogens subscript which is 5. So it would be (4)(5)=20
The prophet Isaac was chosen to lead the Israelites after the death of Abraham.
O True
O False
Which of the following scenarios is a chemical reaction NOT taking place. Bobby notices that his bike rusted when left out in the rain over night.
Ann notices that the bread turned green over a long amount of time.
Timmy dissolves salt in warm water.
Betty colors her hair blond with bleach.
Answer:
got to be salt in warm water as for the bread it produces mold and also bleach is a chemical
which two senses require that chemical compounds be dissolved in solution before they can act as stimulants for these senses?
The two senses which is require in the chemical compounds be dissolved in solution before they can act as stimulants for these senses are smell and odour.
Stimulant for smell include molecules which are dissolved in the air gas easily, can be easily detected by the odour recepters which are located on the nostrils upon binding. The smell neurons transfer this information to the smell bulb which are located in the forebrain all the olfactory process occur.
The sensation of taste occur when our food is dissolved in the saliva secreted by the salivary gland located below the tongue. This food dissolved in saliva binds with the recepters of the tongue which are located on the taste buds of papillae.
Thus, we concluded that the two senses which is require in the chemical compounds be dissolved in solution before they can act as stimulants for these senses are smell and odour.
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The speed (c) of a wave =
Answer:
the case of a wave, the speed is the distance traveled by a given point on the wave (such as a crest) in a given interval of time. In equation form, If the crest of an ocean wave moves a distance of 20 meters in 10 seconds, then the speed of the ocean wave is 2.0 m/s.
Explanation:
What causes tectonic plates to move? What is a convergent boundary? What is a divergent boundary? What is a transform boundary? What is a transform boundary?
A transform boundary occurs when two tectonic plates move past one another.
What causes tectonic plates to move? What is a convergent boundary? What is a divergent boundary? What is a transform boundary? What is a transform boundary?
Tectonic Plates Movement:
The tectonic plates can be thought like the pieces of the broken or cracked shells. The heat from radioactive processes within the planet's interior causes the plates to move, The heat from radioactive processes within the planet's interior causes the movement of the tectonic plates.
Convergent Boundary:
Convergent boundary is that area or is that boundary from which the plates moves towards each other.
Divergent Boundary:
Divergent boundary is that boundary or area from which the tectonic plates starts moving away from each other.
Transform boundary:
The transform boundary is that boundary which causes a fault or error between the tectonic plates.
So we can conclude that a transform boundary occurs when two tectonic plates move past one another.
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Which element has seven energy levels?
rubidium (RD)
potassium (K)
cesium (Cs)
francium (Fr)
lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (FR) all have 7 energy levels
sorry if im wrong im kinda fried RN
Answer:
The answer is francium (Fr)
Explanation:
I just took the test
How many molecules of H,0 can be produced from 0.918 mol NO, according to the balanced equation?
4NH3+6NO --> 5N + 6H2O
Explain the difference between plate tectonics and tectonic plates.
Answer:
Plate tectonics...Plate comes first
Tectonic Plates... Tectonic comes first...
Answer:
plate tectonics is a scientific theory that describes the large-scale motion of Earth's lithosphere
tectonic plates are composed of oceanic lithosphere and thicker continental lithosphere, each topped by its own kind of crust
Explanation:
1. What kind of energy is inside the child on the bike?
Answer:
Cuando uno monta en bicicleta, el cuerpo convierte la energía química de los músculos para producir energía mecánica.
Explanation:
what is the mass of 1.506 x 10^24 atoms of Argon
Answer:
Mass = 99.875 g
Explanation:
Given data:
Number of atoms of Ar = 1.506× 10²⁴
Mass in gram = ?
Solution:
Avogadro number:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance. The number 6.022 × 10²³ is called Avogadro number.
1 mole = 6.022 × 10²³ atoms
1.506× 10²⁴ atoms × 1 mol / 6.022 × 10²³ atoms
0.25× 10¹ mol
2.5 mol
Mass in gram:
Mass = number of moles × molar mass
Mass = 2.5 mol × 39.95 g/mol
Mass = 99.875 g
The Elements sodium(Na) and bromine (Br) combine to make the compound Sodium bromide, Sodium is a metal and bromine is a Non-metal.
What type of bond holds these two elements together?
Answer:
The type of bonding that occurs between metals and non metals is ionic bonding,so the type of bond between Na and Br is an ionic bond
The word science means...
Life
Knowledge
Thinking
By definition science is, the intellectual and practical activity encompassing the systematic study of the structure and behavior of the physical and natural world through observation and experiment.
in the nineteenth century, theoretical and experimental scientists knew something was wrong with the energy of the electromagnetic spectrum because
Answer: According to the electromagnetic theory of the 19th century,
it had become clear that electricity and magnetism were related, and their theories were unified: wherever charges are in motion electric current results, and magnetism is due to electric current! Hope this Helps!
Why was it important to decide between the lunar orbit Rendezvous method and the earth orbit rendezvous method near the beginning of project apollo?
A. Engineers could not decide which method to use until they had built and tested the lunar miss vehicle.
B. Engineers could not start designing the spacecraft until they knew set of constraints to follow.
C.Engineers could not determine the goals of project apollo until they figured out how to get to the moon and return safely to earth?
what answer is it?!! pls answer fast!!!!
It was important to decide between the lunar orbit Rendezvous method and the earth orbit rendezvous method near the beginning of project Apollo because Engineers could not decide which method to use until they had built and tested the lunar miss vehicle and is therefore denoted as option A.
What is Apollo?This was a scientific exploration of the Moon in which instruments were deployed to measure the distance from the Moon to the Earth.
This was also set up in other to measure the Moon's seismic activity and involved the use of spacecraft but there was difficulty in selecting between the lunar orbit Rendezvous method and the earth orbit rendezvous method near the beginning of project Apollo.
This was because if the earth orbit rendezvous failed, the threatened astronauts could be brought back home easily while if a rendezvous around the moon failed, the astronauts would be too far away to be saved which is therefore the reason why option A was chosen as the correct choice.
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HELP PLEASE
How can you tell for sure that a redox reaction has happened?
O A. If a precipitate forms, it is a redox reaction.
O B. If compounds break apart, it is a redox reaction.
O c. If atoms rearrange, it is a redox reaction.
O D. If oxidation states change, it is a redox reaction.
Answer:
Answer is D. Just took the quiz on A P E X
Explanation:
If oxidation states change, it is a redox reaction. Hence, option D is correct.
What are oxidation-reduction reactions?Oxidation-reduction reactions are balanced by two half overall chemical equations into an oxidation equation and a reduction equation.
In redox reactions, the half-reactions of oxidation and reduction always occur simultaneously in pairs.
The oxidation half-reaction involved the loss of electrons from a reduced substance (A) to form an oxidized substance (A⁺):
A ⇒ A⁺ + e-
In contraposition, during the reduction half-reaction the oxidized substance (B⁺) gains electrons to form the reduced substance (B):
B⁺ + e- ⇒ B
The overall redox reaction is obtained by the addition of the two half-reactions:
A ⇒ A⁺ + e-
B⁺ + e- ⇒ B
A + B⁺⇒ A⁺ + B
The electrons gained by B are provided by A, which lost the same number of electrons. Thus, the oxidation/reduction reactions are paired.
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which of the following will react with a solution of zinc sulphate fastest ?
A. Potassium
B. Aluminum
C. Magnesium
D. Copper
Answer:
C. Magnesium
Explanation:
Zinc sulphate (ZnSO4) will react fastest with Magnesium (Mg) because magnesium is more reactive than Zinc and other given elements.
Zinc sulphate (ZnSO4) reacts with Magnesium (Mg) and undergo displacement reaction. Zinc is displaced by magnesium and form Magnesium Suphate (ZnSO4).
ZnSO4 + Mg => MgSO4 + Zn
The model of the atom changed as new evidence was discovered. The plum pudding model suggested that the atom was a ball of positive charge with electrons embedded in it. Evidence from the alpha particle scattering experiment led to a change in the model of the atom from the plum pudding model. Explain how. PLS HELP RN :)
Answer:
so since the model atom was changed as new evidence, and the plum pudding model was a ball of positive charge, the alpha particle scattering which broke up the atom
Which receives the most solar radiation?
a. the oceans
b. the polar zones
C. the temperate zones
d. the tropics
Answer:
D
Explanation:
tropical areas receives the most solar radiation because the sun's rays are nearly perpendicular to the earths surface