Answer:
It would have 74 valence electrons
A scientist measures the heart rates of 30 students from the same class before
and after they run for different amounts of time. The experimental set up is
shown below:
• Group 1 had ten students who ran one lap.
• Group 2 had ten students who did not run at all.
• Group 3 had ten students who ran two laps.
Group 4 had 30 students from another class whose heart rates were
not measured.
Which group is the control in this experiment?
A. Group 1 from this class
B. Group 2 from this class
C. Group 3 from this class
D. Group 4 from another class
The for this question will be d
The speed limit on a certain highway is 80 kilometers per hour. What is this speed in centimeters per second?
The speed : 2222.2 cm/s
Further explanationVelocity has magnitude and direction
Can be formulated :
[tex]\tt \boxed{\bold{v=\dfrac{d}{t}}}[/tex]v= velocity, m/s
d=distance=m
t=time,s
convert from km/h to cm/s :
[tex]\tt =80\dfrac{km}{h}\times \dfrac{10^5~cm}{1~km}\times \dfrac{1~h}{3600~s}\\\\=2222.2~\dfrac{cm}{s}[/tex]Why is it important for a community to have many different organism living together?
Answer:
Individual organisms live together in an ecosystem and depend on one another. In fact, they have many different types of interactions with each other, and many of these interactions are critical for their survival. ... One category of interactions describes the different ways organisms obtain their food and energy.
The rock was white and black speckled with a density of 2.6 g/mL. Physical or chemical property?
Answer:
Chemical
Explanation:
Phillip throws a basketball up in the air and through a hoop. Because the ball is acted on by the force of gravity, the ball will —
Answer:
Fal down to the flour
Explanation:
Because of gravity their is weight that weight keeps us down to earth everything has weight even a leaf not only weight but the atmosphere is like a wall that keeps us safe from all the stuff in space.
How does solubility impact the temperature?
Answer:
For many solids dissolved in liquid water, the solubility increases with temperature. The increase in kinetic energy that comes with higher temperatures allows the solvent molecules to more effectively break apart the solute molecules that are held together by intermolecular attractions.
Explanation:
Make sure to edit so you do get copy-writed
answer asap correctly for brainleist and pls give the right answer thx!
A
Explanation:
B is wrong because it talks about speed, C is wrong because it talks about direction, and D is wrong because it talks about the amount of tilt. A is correct because it's the only one that talks about the time of the orbit and the time of orbit determines the length of a year. :)
What are some of the challenges and reasons for
sending people back to the Moon by 2024?
Answer: Prob to see if anything new has came or has happened
Explanation:
Answer:
NASA Publishes Artemis Plan to Land First Woman, Next Man on Moon in 2024. ... We're going back to the Moon for scientific discovery, economic benefits, and inspiration for a new a generation of explorers. As we build up a sustainable presence, we're also building momentum toward those first human steps on the Red Planet.
Explanation:
Complete the sentence by using the drop-down menus
to choose the words that describe the image most
accurately
To make an omelet, first
the egg and then let
the insides slide
into the bowl.
Answer:
1st one: crack
2nd: carefully
Explanation:
Answer:
Crack and then carefully
Explanation:
I just did it in edgen 2020
why is the chemical reaction between nitric acid and sodium hydroxide called a neutralization reaction?
Answer:
Because nitric acid is acidic in nature and sodium hydroxide is basic in nature so when acid and base react they become neutral.
Bromine has a higher ionization energy than chlorine
True or False
Answer:
Chlorine
Explanation:
Since chlorine is above bromine in the periodic table, following the trends of ionization energy in the periodic, the further up you go the more energy is required to ionize an atom.
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.
What process is required for minerals to crystallize from magma
Answer:
Chemical differentiation
Explanation:
The process by which minerals crystallize out of magma is termed chemical differentiation. Some times, it is referred to as magmatic differentiation.
Minerals have different properties and at certain environment, it comfortable for the settle out of magma. Some minerals can crystallize out at very high temperature. Some will form at medium temperature whereas, some are low temperature minerals. Based on the properties of the minerals in a melt, a minerals will differentiate at various temperature and pressure regimes.you find 13406190 pennies. how many dollars did you actcually find? if each penny weighs 4 grams, how much does all of it weigh in ponds
Answer:
134,061.9 dollars and 118,222.45 lbs.
Explanation: you're welcome :)
The atomic mass unit is based on which element?
Carbon-12
Carbon-12 is the reference for all atomic mass calculations. An atomic mass unit is defined as a mass equal to one twelfth the mass of an atom of carbon-12.
Ung number three po plssssssssssss.
Answer:
For #3 I believe it's A
Explanation:
It can't be changed INTO a solid because it already is one.
Hope this helps!
The mass ratio of hydrogen to oxygen in water (formula H20) is 0.126 g hydrogen for every 1 g of oxygen. In another compound of hydrogen and oxygen called hydrogen peroxide, the mass ratio of hydrogen to oxygen is 0.063 g hydrogen for every 1 g of oxygen. What is a possible formula of hydrogen peroxide?
Answer: H2O2
Explanation:
please answer these questions!
Explanation:
1)
Equation -
Propane + oxygen → carbon dioxide + water
C₃H₈ + 5O₂ → 3CO₂ + 4H₂O
Here,
Products are -
Carbon dioxide (CO₂) Water (H₂O)2)
Equation -
AgNO₃ (aq.) + NaCl (s) → AgCl ↓ + NaNO₃ (aq.)
Double Displacement reactionOur _____________ is affected by physical environment.
a.
pitch
b.
touch ethic
c.
behavior
d.
verbal communication
Answer:
is behavior
Explanation:
becuase behavior can be affected on the eviroment we are in
Our behavior is affected by physical environment.
What is physical environment?Individuals live, study, work, even play in their external surroundings. People's physical environments are influenced by the air those who breathe, the water they consume, the homes they reside in, and the vehicles they need to get to school and work.
What is behavior?The way someone acts was referred to as their behavior. That's what a person must do to make things happen, modify something, and maintain the status quo.
Our behavior is affected by physical environment.
Therefore, the correct answer will be option (c)
To know more about physical environment.
https://brainly.com/question/13319728
#SPJ2
WILL GIVE BRAINLIEST A student heated some matter, which caused some of its properties to
change. A change in which two properties would indicate that the matter
underwent a chemical reaction?
A. State
B. Temperature
C. Melting point
D. Color
Answer:
Color and Melting Point
Answer:
Explanation:
Color melting point
what's the functional group if ch3c2ch3oh
Branches are thrown into a wood chipper and mulch is created. Chemical change or physical change?
Definitely, a physical change.
What are chemical and physical changes?A chemical change is a type of change involving the chemical composition of substances. The chemical composition changes completely and lost its old identity.
Chemical changes are unlike physical changes. The latter involves changes to the physical characteristics of substances. The changes do not get to the chemical level.
Thus, chemical changes are ordinarily not reversible but physical changes can be reversed.
When branches are thrown into a wood chipper and mulch is created, a physical change has taken place because the branches can still be recovered from the mulch.
A mulch is just a material layer placed on soils to conserve moisture.
More on physical changes can be found here: https://brainly.com/question/17931044
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What are the criteria for purity
Answer:
melting and boiling points
Explanation:
The technique for determination of melting and boiling points will also be described in this unit. Pure solid and liquid compounds possess sharp melting and boiling points. Therefore, melting and boiling points of a compound
Use the reaction given below to solve the problem that follows: Calculate the mass in grams of aluminum metal required to react with 115 g of oxygen
gas
grams Al
4 Al + 3O2 --> 2 Al2O3
**Your answer should be written as XXX
Answer:
4Al + 3O2 --> Al2O3
Step 1; fi
Which of the following is an oxidation-reduction reaction? ZnS(s) + 2O2(g) ZnSO4(s) CaO(s) + H2O(l) Ca(OH)2(s) 6Li2O(s) + P4O10(g) 4Li3PO4(s) SO2(g) + H2O(l) H2SO3(aq)
ZnS(s) + 2O₂(g) ⇒ZnSO₄(s)
Further explanationThe oxidation-reduction reaction or abbreviated as Redox is a chemical reaction in which there is a change in oxidation number
Oxidation is an increase in oxidation number, while reduction is a decrease in oxidation number.
Reaction
ZnS(s) + 2O₂(g) ⇒ZnSO₄(s)
S²⁻ (-2 in ZnS) to S⁺⁶(+6 in ZnSO₄) ⇒ oxidation
O₂(0 in O₂) to O⁻²(-2 in ZnSO₄)⇒ reduction
Answer:
A. ZnS(s) + 2O2(g) Right arrow. ZnSO4(s)
Explanation:
If I have 13 protons and 12 electrons what is my charge?
Answer:
The charge would be +1
Explanation:
Protons have a positive charge while electrons have a negative charge. Therefore, it's simple subtraction. In every case, subtract the number of electrons from the number of protons.
13 - 12 = 1
Therefore the charge is +1
Here's one more example:
If the element chromium (Cr) has 24 protons and 28 electrons, what is its charge? Remember that protons have a positive charge and electrons have a negative charge.
24 - 28 = -4
Charge = -4
It would be written as followed when associating charge with a specific element: [tex]Cr^{-4}[/tex]
If an element has a neutral charge, that means the number of protons and neutrons are the same. If you look at the periodic table of elements, all of the elements listed have a neutral charge. The 0 isn't showed in the corner because it isn't necessary.
Bonus Information:
This isn't related to your question, but I've come across confusions when it comes to particles. Remember that protons (+) and electrons (-) are the only particles that have a charge, therefore, as it says in it's name, neutrons are neutral or have no charge. Neutrons do not contribute to charge, but they do contribute to the mass of an atom. So the number of protons added to the number of neutrons equate to the mass of an atom. Electrons have mass, but it's so miniscule and insignificant that it doesn't even contribute to the overall mass of the atom, so don't count those.
Remember:
C = p - e
M = p + n
C = atomic charge, M = atomic mass, p =protons, n = neutrons, e = electrons
I hope this helps!
im in the middle of a chem test and i literally have no clue what is happening
Answer:
No question so I'm just taking the points
what are the products of
C6 H12 + 9O2
?
Please hurry i really need it fast
Am i gay?
I cant tell so i may need a third party to tell me whether i like men or not
Answer:
ok
Explanation: whatever you think