Student
# Hours
Student
# Hours
Twenty students were surveyed to find out how
many hours of TV they watch during a school
week. The results are shown to the right. Answer
the following questions and round your answers to
the nearest half hour.
1
2.
11
4
2
5
12
1
3
3
13
N
The mode of the data is
hours.
4
5
14
6
DONE
5
1
15
2.
6
4
16
3
7
6
17
10
8
12
18
10
9
2.
19
8
8
10
6
20
7
Answer:
jskixiii98777277888
Explanation:
jchhh
Answer: 2 hours
Explanation: right on ED 2020
Can sum1 Help me with my CHEMISTRY!!!!
ANYONE PLEASE!!!!
Answer:
Substance 1 = 1.77 g/mL, corn syrup.
Explanation:
For each substance, find the density and compare to the table given to name the substance. The density is mass divided by volume ( g/mL).
1. 23g/13mL = 1.77g/mL
Let me know if you need more help.
Which subatomic particle has the least mass?
electron
proton
neutron
positron
The atoms of an element are made of subatomic particles that include electrons, protons, neutrons, positrons, etc. The electron has the least amount of relative mass. Thus, option A is correct.
What are subatomic particles?Subatomic particles are the smallest unit that makes a whole atom. The positively charged particle, a proton has a relative mass of 1.672 × 10⁻²⁷ kg and is the same as the neutron particle.
Though the neutrons lack any charge and are present in the nucleus with protons. The other particle called electrons is negative in charge with a relative mass of 9.1 × 10⁻³¹ Kg.
The electron is outside the nucleus in the shells. The positrons have the same mass as an electron but carry an opposite charge and act as antimatter.
Therefore, option A. the electrons have the least amount of mass in an atom.
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A characteristic of a substance that may be observed or measured without changing the composition of the substance is a(n) ___ property.
A)chemical
B)intensive
C)physical
Answer:
c physical
Explanation:
Which substance gets broken down in a homogeneous mixture? O colloid solution solute Osolvent
Answer:
Solute
Explanation:
i just did the quiz
Answer:
Solute
Explanation:
how many valence electrons does silicone have?
Answer:
four valence electrons
Explanation:
Based on what you have read, what would be another example of kinetic energy?
A hammer hanging from a peg
Ahammer resting on a table
A hammer falling off a table
A hammer lying on a board
Answer:
its a hammer falling off a table
Explanation:
i think its cause the gravitational energy gets converted to kinetic energy when its falling down
The correct answer is a hammer falling off a table.
What is the meaning of kinetic energy?Kinetic energy is the energy that an item or particle has as a result of its movement. When work is done on an object by exerting a net force, the object accelerates and gains kinetic energy as a result.Is the kinetic energy of a hammer falling off a table?When the hammer falls off a table, the potential energy contained in the hammer is transferred to kinetic energy.
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blue litmus turns red when it reacts with true or false
Answer:
yes, it does.
Explanation:
It is also used to test acidic like solutions.
Answer:
It is true.
Explanation:
hope helps!!!!!!!!!!!!!!!!!!
If you filter a mixture of sand and salt-water, what will the solid residue in the filter paper consist of?
Salt only
Sand and salt
Sand only
What would likely happen if a multicellular organism no longer performed mitosis
If a multicellular organism no longer performed mitosis, then decay process will start. Mitosis, in its strictest sense, refers to the duplication and dispersion of chromosomes.
What is mitosis?Mitosis is a cell duplication or reproduction process in which one cell produces two identical daughter cells. Mitosis, in its strictest sense, refers to the duplication and dispersion of chromosomes, those structures that contain genetic information.
The chromosomes has replicated as well as the proteins that will construct the mitotic spindle have really been produced prior to the commencement of mitosis. Mitosis begins with the thickening as well as coiling of something like the chromosomes during prophase. The nucleolus, which is a spherical structure, shrinks and vanishes. If a multicellular organism no longer performed mitosis, then decay process will start.
Therefore, decay process will start.
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What is the difference in concentration between a pH of 7 and 12?
Answer:
The pH of a solution is simply a measure of the concentration of hydrogen ions,
H
+
, which you'll often see referred to as hydronium cations,
H
3
O
+
.
More specifically, the pH of the solution is calculated using the negative log base
10
of the concentration of the hydronium cations.
∣
∣
∣
∣
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
a
a
pH
=
−
log
(
[
H
3
O
+
]
)
a
a
∣
∣
−−−−−−−−−−−−−−−−−−−−−−−−
Now, we use the negative log base
10
because the concentration of hydronium cations is usually significantly smaller than
1
.
As you know, every increase in the value of a log function corresponds to one order of magnitude.
Explanation:
Answer:
ph level of 12 is very high almost bleach but ph level of 7 is about normal.
Explanation:
Iron reacts with oxygen to form iron oxide (rust). Which best describes this statement? Iron oxide is the liquid state of iron. Iron oxide is the gaseous state of iron. Iron oxide is formed by rearranging atoms. Iron oxide is made up of only iron atoms.
Answer:
iron oxide is formed by rearranging atoms
Explanation:
Iron oxide is formed by rearranging atoms best describes the statement Iron reacts with oxygen to form iron oxide (rust).
What is iron oxide?Iron oxides are compounds that are formed by the reaction of iron and oxygen.
The balanced chemical equations for these reactions look like this
4Fe(s) + 3O₂ → 2Fe₂O₃
Hence, option c is the answer.
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imagine that an explosion on the moon produced sound waves the light waves . would both kinds of wave reach an astronaut in a spaceship flying nearly in empty space ? would the astronaut therefore see and hear the explosion? explain why or why not.
Answer:
yes, he would see the light first, depending on distance he might hear it but might not notice it.
Explanation: light travels lightyears away and is seen rather quickly. sound waves are much slower but you can hear it.
IDENTIFY THE CHEMICAL REACTIONS( CLICK ALL THAT APPLY)
A.COMPOSITION(SYNTHESIS)
B. SINGLE REPLACEMENT
C. EINSTEIN AND ROSEN BRIDGE
D.COMBUSTION
Answer:
B. single replacement
Explanation:
Li+1 had gained ______ one electron
I need the answer really fast !!! Help
Answer:
A
Explanation:
the baking soda and vinegar were products of a chemical reaction
⚠️⚠️PLEASE HELP ASAP⚠️⚠️
A sodium atom and a sodium ion must have the
same number of
(1) neutrons (3) occupied principal energy
levels
(2) protons (4) outermost electrons
Answer:
The answer is (2) Protons
Will the fire started by burning magnesium and methane let out by a fire extinguisher?! THIS IS EMERGENCY HERE!
Answer:
uh yes?
Explanation:
Answer:
i think so just try it
Explanation:
good luck
Lithium and sodium show similar
chemical properties. Which of the
following statements is not true about
(a)They have equal number of electrons in their outermost shells
(b) Both exist in the +1 oxidation state in their compound
(c)They belong to the same group in the periodic table
(d) They are in the same period in the periodic table
Answer:
D
Explanation:
Iithium and sodium are not in the same period
Which atoms would be bigger fluorine or bromine ?
Brainliest.....If you give me a random answer you will be reported.... Also you will lose any chance to obtain a brainlest from me in the future
When an ammonium ion reacts with water, water acts as a Brønsted-Lowry base. Choose the reaction that describes this.
A. NH4+(aq) + H2O(l) ⇌ OH−(aq) + NH52+(aq)
B. NH4(aq) + H3O+(aq) ⇌ H2O(l) + NH52+(aq)
C. NH3(aq) + H2O(l) ⇌ H3O+(aq) + NH2−(aq)
D. NH4+(aq) + H2O(l) ⇌ H3O+(aq) + NH3(aq)
Answer:
im pretty sure its b
Explanation:
im sorry if im wrong i tried my best
Sodium chloride (NaCl) is formed in a chemical reaction between sodium (Na) and Chlorine (Cl2 ). What is sodium chloride?
Answer:
When a sodium atom transfers an electron to a chlorine atom, forming a sodium cation (Na+) and a chloride anion (Cl-), both ions have complete valence shells, and are energetically more stable. The reaction is extremely exothermic, producing a bright yellow light and a great deal of heat energy.
hope this help. sorry if im wrong
What is an atomic theory?
A. An idea about what atoms are like
B. A prediction about nuclear reactions
C. A theory about how atoms first came to be
D. A theory about gravity
Answer:
a
Explanation:
In the cells of the human body, oxgen molecules are used directly in a process that what?
Answer:
cellular respiration. C6H12O6 + 6O2 → 6CO2 + 6H2O.
Explanation:
the process where cells convert chemical energy and/or nutrients into ATP and then the cells release the waste.
How could Armando use this model to test the idea that very steep hills lead to narrow, deep rivers?
Armando used this model to test the idea that you can modify the table legs using a certain sand size and record the results to test the hypothesis that extremely steep hills lead to narrow, deep rivers.
What is a model?A model is an artificial representation of an object or a process. Models are used to show the process or things that are very big and can not be understood by the actual thing.
Sand, granite, mud, and other objects from the earth are carried away by the energy of the rushing water, along with water-soluble substances like limestone.
Thus, depending on how quickly a river flows, it has more or less. The ability to remove more material, as the river runs more quickly when it is narrow than large, leads to the development of a deep and narrow river.
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The question is incomplete. Your most probably complete question is given below:
Using Models to Answer Questions About Systems
Armando’s class was looking at images of rivers formed by flowing water. Most of the rivers were wide and shallow, but one river was narrow and deep.
Armando’s class thinks that this river is narrow and deep because:
the hill that the water flowed down was very steep, or
the sand grains that the water flowed through were very small.
How do the isotopes carbon-13 and carbon-14 differ?"
Answer:
They have different number of neutrons.
Explanation:
Where is ionization energy highest on the periodic table ?
Top right
Bottom right
Bottom left
Top left
Answer:
Top right.
Explanation:
The Periodic Trend for Ionization Energy is up and to the right. Therefore, the highest ionization energy levels will be in the top right.
Noble gases like He and Ne would be examples of elements with extremely high ionization energy. Since their valence electron shells are full, they become core electrons and are stable. If you remove an electron, it would become unstable. Therefore, the element doesn't want to remove the electron, and would take a significant amount of joules to remove it.
Elements in a group (column) on the periodic table can be expected to have similar
atomic masses.
atomic numbers.
numbers of neutrons.
properties.
Answer:
The answer is properties
Explanation:
Atomic masses,numbers and numbers of neutrons varies from each element on the periodic table but once they are in the same group they are expected to have similar properties.
Elements in a group (column) on the periodic table have similar properties.
Element in the periodic table are arranged according to there atomic number.
The atomic number of an element is the proton number of an element.
Elements in the same group have similar properties. The properties maybe chemical or physical properties.
For example group 1 elements are very reactive. This group 1 elements have charges of +1. There cations are represented as A⁺¹.
Generally, elements in the same groups have similar properties.
These properties maybe there metallic nature, reactivity, Valence electrons, valency, atomic size, ionization energy, electron-positivity and electron-negativity
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what is the similarity between radioactive iodine and stable iodine
Answer:
both iodine
Explanation:
This diagram shows a marble with a mass of 3.8 grams (g) that was placed into 10 milliliters (mL) of water. Using the formula D = MV, what is the density of the marble? 0.29 g/cm 3 0.38 g/cm 3 1.27 g/cm 3 2.63 g/cm 3
Answer:
1.27 g/cm^3
Explanation:
Density of a body is defined as mass/volume. We can easily read off the mass of the marble from the image.
Mass of the body = 3.8 grams
Volume of the body = 3 ml
Density of the body; mass/volume
D= 3.8/3
D= 1.27 g/cm^3