Answer:
See explanation
Explanation:
If heat is given out in a reaction, then that reaction is exothermic. If heat is absorbed in a reaction, then that reaction is endothermic.
Hence, if heat is given out, the reaction is exothermic. The heat given out does work on the surrounding thus the laws of conservation of energy are obeyed.
Answer:
The reaction is exothermic.
Explanation:
I took the test
The model represents a fluorine (F) atom
what is the mass of the atom
Answer:
19
Explanation:
The mass of an atom is given by its mass number. This is because the mass of an atom is concentrated at the nucleus.
Mass number = number of protons + number of neutrons
Protons and neutrons are the most massive particles in any atom.
Protons are the positively charged particles in an atom
Neutrons are uncharged particles.
So, the mass number of this atom is:
Mass number = 9 + 10 = 19
the question is on the screenshot worth 20 points pls help
Answer:
Cell Y Only
Explanation:
Some fruits and vegetables are preserved by pickling them. Nandini got confused
with the various steps to be taken to preserve mangoes. Can you help her to
arrange them in the correct order?
1. Cut the mangoes into pieces.
2. Keep the pieces in the sun.
3. Add salt to the pieces.
4. Store it in a dry jar.
5. Wash and dry them
Answer:
ye
Explanation:
ye
A teacher asks students to design an activity to study the formation of inherited traits. Which activity should the students design?
Answer:
The students should create a project in which they each look at a unique trait that each have (for example, detached ear lobes) and look at their parents to see if they too have this trait. To take it a step further, look at their grandparents for this trait, and ask them about their parents and if they have this trait, this could tell them whether the trait has always, been apparent within the family, if it skipped a generation, or the genetics of one parents were more dominant then the other.
3. What is the best description of an ionic bond?
A. electrostatic force of attraction between positive and negative ions
B. electrostatic force of repulsion between ions of the same charge
C. nuclear force of attraction between protons of different atoms
D. nuclear force of repulsion between protons of different atoms
what are some similarities between polar and nonpolar molecules
Answer:
Explanation:
Polar bonds also often contribute to a net dipole moment of a molecule. This basically means that there are partial charges that make a molecule overall polar. One example might be water: in H20, oxygen is very electronegative, and hydrogen is less so. This means that oxygen is more negative and hydrogen is more positive. This is why water is cohesive (can stick together): The positive ends stick to the negative ends.
To solve this we must be knowing each and every concept related to polar molecule. Therefore, polar and nonpolar molecules are covalent compound.
What is polar molecule?A polar molecule is a type of chemical compound where there is an uneven distribution of electrons among the covalently bound atoms.
The term "polarity" refers to how unlike two molecules' electrical poles are from one another. If they are quite dissimilar, the species is said to be an extremely polar molecule.
Because of the more symmetrical distribution of the electrons, non-polar molecules do not have a lot of charges on their opposing sides. The fees are all offset by one another. Polar and nonpolar molecules are covalent compound.
Therefore, polar and nonpolar molecules are covalent compound.
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Please help!! This would mean so much to me!!
Answer:
I think it's the A one. Hope it's correct
Answer:
A option is correct
Explanation:
Question
What is the best thing to do if you are asked to complete a task at work that you
believe could endanger your safety?
A) ask someone else to do it
B) keep working, but talk to your boss when they are available
C)tell your boss and return to the task only when you feel it's safe
D) trust your boss and complete the task
3 , from
lowest to highest: A) Exosphere; B) Stratosphere; C)
Troposphere
A
A, C, B
B
B, A, C
С
C, B, A
D
C, A, B
Answer:
troposphere
stratosphere
exosphere
Carbon Monoxide is a toxic gas that is colorless and tasteless. How many moles of CO are in 1 L of the gas at STP?
28 moles
0.045 moles
22.4 moles
0.224 moles
Answer:
0.045 moles
Explanation:
Given data:
Moles of CO = ?
Volume of gas = 1 L
Temperature and pressure = standard
Solution:
The given problem will be solve by using general gas equation,
PV = nRT
P= Pressure
V = volume
n = number of moles
R = general gas constant = 0.0821 atm.L/ mol.K
T = temperature in kelvin
n = PV/RT
n = 1 atm× 1L / 0.0821 atm.L/mol.K × 273 K
n = 1 atm.L / 22.41 atm.L/mol
n = 0.045 mol
The correct electron configuration of the O2-ion is
A)
2-4
B)
2-5
C)
2-7
D)
2-8
which one of the following groups are decomposers a. algae b. protist c. fungi d. green plants e. photosynthetic bacteria
Answer:c
Explanation:
Where does the waste material in the body come from
and why does the body need to get rid of these waste
materials?
Answer:
The cells of the body produce waste materials. The body needs to get rid of these waste materials because they can make us sick. Getting rid of this waste keeps us healthy.
Explanation:
____________________________________________________________
The Answer I Put On Mine:____________________________________________________________
The cells inside of your and my body alike produce these waste materials. We need to get rid of them because if we don't, we could get sick! Or possibly cause something worse...
____________________________________________________________
Why?____________________________________________________________
Well, the answer kind-of explains all I would want to say! Feel free to copy and paste this on your assignment, but do NOT use the sample answer like the other person who answered this did. (The sample answer you should NOT use: "The cells of the body produce waste materials. The body needs to get rid of these waste materials because they can make us sick. Getting rid of this waste keeps us healthy.") It could make your teachers or parents suspicious of your work! Anyways, have a good day! ❥
what is the temperature in the fahrenheit?
plz help me with this :)
Answer:
they are randomly moving
Explanation:
Answer:
B
Explanation:
Red shift indicates that stars are moving further away.
If you've got 3.011 X 10 ^ 24 atoms of Boron (B), how many grams do you have?
a
5.0 grams
b
54.055 grams
c
16.7 grams
d
1.82 grams
0.00099989
3 sig figs, scientific notation
Which is the balanced equation for S8 + O2 → SO2?
S8 + O16 → 8SO2
S8 + O2 → S8 + O2
S8 + O2 → S8O2
S8 + 8O2 → 8SO2
Answer: S8 + O2 → S8O2: not 100% sure
Explanation:
A balanced chemical equation happens when the quantity of the particles is required on the reactants side is equivalent to the quantity is the molecules in the items side.
What's the name of ZrBr4
Answer:
fu-ck fick
Explanation:
Sodium Chloride is an ionic compound. Its molar mass is 58.44g. One formula unit of NaCl consists of one____, whose chemical symbol is___ and one___whose chemical symbol is___. Please help me to fill in the gaps :)
Answer: One formula unit of NaCl consists of one cation, whose chemical symbol is [tex]Na^+[/tex] and one anion whose chemical symbol is [tex]Cl^-[/tex]
Explanation:
For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.
The cation is formed by the metal sodium which forms [tex]Na^+[/tex] and the anion is formed by non metal chlorine which forms [tex]Cl^-[/tex].
For a formula unit of sodium chloride, the charges have to be balanced , thus the valencies of ions are exchanged and the neutral compound result. Thus
[tex]Na^+[/tex] and [tex]Cl^-[/tex] combine to form neutral [tex]NaCl[/tex]
R-0-R.
What functional group is it
What does this quote mean to you?
"Lighten up on yourself. No one is perfect. Gently accept your humanness."
Answer:
To me it means no need to be so hard on yourself because nobody is perfect. You should love yourself for who you are and try to improve yourself everyday.
Explanation:
):)
Identify the chemical reaction Below:
Ca(OH)2 + HCI CaCl2 + H20
Answer:
Neutralizaion reaction!
Explanation:
Calciumhydroxide under Hydrochloric acid gives Calciumchloride with the formation of water.
--What do you have to do to the coefficients of equation I below to get to equation II?
i) 2 [tex]SnO_{2}[/tex] + 4 [tex]H_{2}[/tex] --> 2 Sn + 4 [tex]H_{2} O[/tex]
ii) [tex]SnO_{2}[/tex] + 2 [tex]H_{2}[/tex] --> Sn + 2 [tex]H_{2} O[/tex]
--Can you divide equation II by another factor and still have it be correct? Why or why not?
--In a complete sentence, write down a method you could use to determine if an equation is written in the correct way.
Answer:
1
Explanation:
Answer:
divide all coefficients by 2.
Explanation:
what is convection,radiation,conduction?
Answer:
Conduction is the transfer of thermal energy through direct contact. Convection is the transfer of thermal energy through the movement of a liquid or gas. Radiation is the transfer of thermal energy through thermal emission.
10. Which statement is the most important reason that some people feel that solar energy power can be a pollution-free energy source? *
A Electricity generation with solar cells produces no pollution.
B Electricity from burning fossil fuels is used to make solar panels.
C Extra materials from the manufacturing process can be collected and reused.
D The raw material for cells is sand, which is easily available without mining
The statement should refer to the most important reason is option b. Electricity from burning fossil fuels is used to make solar panels.
What is solar energy power?It is the energy that arise from the sun that should be converted into thermal or electric energy.
It is the cleanest and the most abundant renewable energy source available.
So based on this, the option b is correct.
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Under certain conditions, what is a chlorine atom able to do to a sodium atom?
Answer:
it produces a bright yellow light and a great deal of heat energy.
Explanation:
I have no idea what the answer is
ill guess c
Explanation:
g
How is the rock in the deep mantle similar to the rock in the parts of the mantle nearest the surface? How is it different?
Answer:
Similarity: Rocks within the mantle contain more magnesium and iron than the ones in the crust.
Difference: Rocks in the deep mantle are under intense heat and pressure. In this case, they are semi-solid rocks that flow slowly. On the other hand, the part of the mantle that is nearest to the surface consists of rigid rocks. It has a lower temperature than the rocks in the deep mantle.
Explanation:
Rocks within the mantle contain more magnesium and iron than the ones in the crust.
What is Rocks?
Rocks in the deep mantle are under intense heat and pressure. In this case, they are semi-solid rocks that flow slowly.
On the other hand, the part of the mantle that is nearest to the surface consists of rigid rocks. It has a lower temperature than the rocks in the deep mantle.
According to geologists, a rock is a naturally occurring material made up of crystalline crystals of various minerals that have fused together to form a solid mass.
Therefore, Rocks within the mantle contain more magnesium and iron than the ones in the crust.
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BRAINLIST AND 45 POINTS
In your own words, describe how magma changes form through the rock cycle to eventually become magma again.
Answer:
Magma becomes rock after the heating process has settled.
Explanation:
Magma is a kind of lava or in other words "Hot melted rock". When rock get really hot it transforms from rock it's solidified state and becomes magma. When magma is hot it can stay that way for a while or until it cools down. When magma does cool down it starts the solidifying state start to come out. If you let the magma cool it will become rock again. This process will happen over and over and it never stops. Every time magma gets cool it hardens, every time it gets hot it melts or and becomes magma. So in conclusion magma only turns back when it has been heated up and liquify.
The rock cycle explains the formation and breaking of the three forms of the rocks through various modes. The magma becomes rocks and magma again through the heating and cooling process.
What is magma?Magma has been the semi-hot liquid that is present in the mantle in the lithosphere of the earth. They have very high temperatures and can push through the crust in the form of volcanic eruptions.
The magma changes its form from semi-liquid to rocks and back to magma again through the rock cycle. The hot molten magma pushes through the crust, cools, and then forms rocks. These rocks after many years start melting at higher temperature or get deep down the mantle where it converts to semi-liquid again.
Therefore, the rock cycle converts the magma.
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