Answer:
The Bayer process is the principal industrial means of refining bauxite to produce alumina (aluminium oxide) and was developed by Carl Josef Bayer. Bauxite, the most important ore of aluminium, contains only 30–60% aluminium oxide (Al2O3), the rest being a mixture of silica, various iron oxides, and titanium dioxide.
Any materials or evidence collected from an explosion site are put into airtight containers.
А. True
B. False
Answer:
true?
Explanation:
Imagine a skateboarder rolling down a hill. As the rider travels down, the PE is turning into KE. But the rider is still slowing down. What causes this?
Question 2 options:
The rider is feeling the effects power transfer
The rider is feeling the effects potential energy
The rider is feeling the effects of friction
The rider is feeling the effects Kinetic energy
Question 3 (1 point)
When Is Mechanical Energy Not Conserved?
Question 3 options:
when there is significant friction or air resistance or other force affecting on the object.
when the electricity is turned off
when it is cold outside
when you are in outer space
Question 4 (1 point)
When a child slides down a slide (if there is no friction and all of the mechanical energy is conserved) what would happen?
Question 4 options:
Kinetic energy would turn in to Potential energy
The energy is destroyed
All energy stays the same
Potential energy would turn to Kinetic energy
Question 5 (1 point)
What is true about the distance traveled by the ping-pong ball at the bottom of the ramp?
Question 5 options:
The greater the distance, the less energy the ping-pong ball had.
The ping-pong ball did not have any energy as it traveled short or long distances.
The greater the distance, the more energy the ping-pong ball had.
Neither mass nor speed had any impact on the distance traveled.
Question 6 (1 point)
If a ball is rolling down the hill, what force is acting on this ball?
Question 6 options:
Elasticity
Gravity
Wind energy
Chemical energy
Question 7 (1 point)
Conservation of Mechanical energy is defined as
Question 7 options:
Energy of motion
The sum of the kinetic and potential energies of an object remains a constant value unless there are forces acting on the object that cause a loss of energy overall, such as friction and air resistance.
law of conservation of energy
potential energy added to kinetic energy
Question 8 (1 point)
Which statement is true regarding the ping-pong ball at the bottom of the ramp in the experiment, “Rolling Along”?
Question 8 options:
No energy was involved in this experiment.
Only potential energy from the ball coming down the ramp will be given to the ping-pong ball at the bottom of the ramp.
The kinetic energy of the ball coming down the ramp will be given to the ping-pong ball at the bottom of the ramp.
All kinetic energy remains with the ball that is coming down the ramp- none of it transfers to the ping-pong ball at the bottom.
Question 9 (1 point)
If a small car and a large truck were moving at the same rate of speed, what would be a true statement?
Question 9 options:
The car would have a shorter stopping distance.
All choices shown
The truck’s mass is greater, therefore it will have a greater stopping distance
The truck would have greater kinetic energy.
Question 10 (1 point)
Saved
In which example would the most transfer of energy take place from Mechanical energy to Thermal (heat) energy?
Question 10 options:
When a feather falls from the sky
When a child slides down a waterslide on an innertube
When a metal plate is pressing against a fast spinning piece of steel hard enough to stop it
When a skydiver opens her parachute
Answer:when there is significant friction or air resistance or other force affecting on the object.
Explanation:
What roles do valence electrons play in atomic bonding?
Answer:
Explanation:
Valence electrons are outer shell electrons with an atom and can participate in the formation of chemical bonds. In single covalent bonds, typically both atoms in the bond contribute one valence electron in order to form a shared pair. The ground state of an atom is the lowest energy state of the atom.
Hope this helps and mark brainlest i only have 1 :(
Valence electrons are the electrons in the outer shell of the atom, with the highest level of energy and that is where all of the chemical reactions and fun things happen.
Which of the following statements are true? Select all that apply.
There are 6.02 * 10^23 sodium ions in one mole of sodium ions.
There are 6.02 * 10^23 atoms of carbon in one mole of carbon.
There are 6.02 * 10^23 molecules of ammonia in one mole of ammonia.
There are 6.02 * 10^23 protons in one mole of protons.
Answer: number one makes the most sense to me let me know if it’s right!
Explanation:
Answer: It is all of them. I just did the quiz. I just use 3 answers but it turned out to be all of them
Explanation:
A 2mL sample of milk has a mass of 8g. What is the density of
milk?
4 g/ml
4 mL/g
0.25 g/ml
none of the above
Carbon and oxygen combine to form carbon dioxide. What are the reactants, or what
is the reactant, in this chemical reaction?
carbon dioxide
carbon only
oxygen only
carbon and oxygen
Answer:
The correct option is d: carbon and oxygen.
Explanation:
The reaction between carbon and oxygen to form carbon dioxide is:
C + O₂ → CO₂ (1)
On the left side of the above reaction (1), we have the reactants, which are carbon (C) and oxygen (O₂) that react to form carbon dioxide (CO₂), which is the only product of the reaction (on the right side of the reaction).
Hence, the correct option is d: carbon and oxygen.
I hope it helps you!
By renaming the anion, we cut off the end of the word and added what three letters?
Answer:
-mot
Explanation:
Hope this helps!
5. How would a water molecule get from the ocean to the clouds ?
water at the surface of the ocean can become water vapor and move into the atmosphere with little added energy from the sun through the process called evaporation. The water droplets that form are what we call clouds
Answer:
Over 96% of total global water is in the ocean, so let's start there. Energy from the sun causes water on the surface to evaporate into water vapor – a gas. This invisible vapor rises into the atmosphere, where the air is colder, and condenses into clouds.
Explanation:
If the moon is full today what will it be in a month
Help me pls due in 4 minutes thanks and have a great day!! :))))
Answer:
Its A, C and D
Explanation:
A= correct because when you add heat to a solid it starts to melt and turn to liquid
B= Incorrect because the more heat that's dded the faster the atoms in the object will move and that creates energy
C= Correct because the liquid is in fact changing to a gas as more heat is added.
D= Correct because as i explained in B the more heat added the more energy is there
I'll give brainliest
Answer:
ajksbcdhsjnoanbshjxibhsjbhxjinbhahsnjxnbs xcjxsnb vdgujkmnb vgyuikmnbgvhjnbh
Explanation:
Please help make sure its correct thanks
The empirical formula : FeBr₃
Further explanationA 8.310 g sample of Iron, so mol of Iron(Ar=55.845 g/mol) :
[tex]\tt mol=\dfrac{mass}{Ar}\\\\mol=\dfrac{8.310}{55.845}\\\\mol=0.149[/tex]
Mass of metal bromide formed : 43.98 g, so mass of Bromine :
[tex]\tt =mass~metal~bromide-mass~Iron\\\\=43.98-8.310\\\\=35.67~g[/tex]
then mol Bromine (Ar=79,904 g/mol) :
[tex]\tt \dfrac{35.67}{79,904}=0.446[/tex]
mol ratio of Iron and Bromine in the compound :
[tex]\tt 0.149\div 0.446=1\div 3[/tex]
True or False? Resistance is the slowing of the flow of electrons and where some of the electrical
energy is converted into heat.
True
False
Answer:
True
Explanation:
Which pathway is correct? proteins to RNA to DNA, DNA to RNA to proteins , RNA to DNA to proteins or DNA to proteins to RNA
Answer:
The sequence order should be DNA to RNA to Proteins.
Explanation:
For you to get the RNA sequence, you need to find a match for the DNA sequence. Your RNA sequence should only have either AUCG for your 4 nucleotide bases. Once you have the RNA sequence found by pairing it with the DNA sequence, you would then to do use an RNA codon chart to find the amino acids. These amino acids are basically your proteins.
DNA to RNA to Proteins
A change in color indicates that what has occurred?
1. a physical change
2. a chemical change
3. precipitation formation
4. gas formation
Answer:
a. phisical change
Explanation:
Answer:
A
Explanation:
Consider the unbalanced equation for the oxidation of aluminum. _Al + _O2 ------> _Al2O3 Which sequence of coefficients should be placed in the blanks to balance this equation? * 2 points 2,3,1 1,3,2 4,3,2 3,2,3
Answer:
4Al + 3O2-> 2Al2O3 :))))
What could be an explanation for the
moon's changing shape?
balance:
n² + h² ➡️ nh³
Answer:
N₂ + 3H₂ → 2NH₃
Explanation:
Chemical equation:
N₂ + H₂ → NH₃
Balanced chemical equation:
N₂ + 3H₂ → 2NH₃
Step 1:
N₂ + H₂ → NH₃
left hand side: Right hand side
N = 2 N = 1
H = 2 H = 3
Step 2:
N₂ + 3H₂ → NH₃
left hand side: Right hand side
N = 2 N = 1
H = 6 H = 3
Step 3:
N₂ + 3H₂ → 2NH₃
left hand side: Right hand side
N = 2 N = 2
H = 6 H = 6
If you initially have a volume of 4 L and a temperature of 300K. Then you decreased the volume to 2 L, what is the new temperature? Choose the appropriate gas law and use a calculator to complete the problem.
Answer:
T₂ = 150 K
Explanation:
Given data:
Initial volume = 4 L
Initial temperature = 300 K
Final volume = 2 L
Final temperature = ?
Solution:
The given problem will be solve through the Charles Law.
According to this law, The volume of given amount of a gas is directly proportional to its temperature at constant number of moles and pressure.
Mathematical expression:
V₁/T₁ = V₂/T₂
V₁ = Initial volume
T₁ = Initial temperature
V₂ = Final volume
T₂ = Final temperature
Now we will put the values in formula.
V₁/T₁ = V₂/T₂
T₂ = T₁V₂/V₁
T₂ = 300 K × 2L / 4 L
T₂ = 600 L.K / 4 L
T₂ = 150 K
3. Compare the alkali metals and alkaline earth metals with respect to:
i) Ionisation enthalpy
ii) Basicity of oxides
Answer:
Alkali metals are group 1 elements while alkaline earth metals are group 2 elements.
Ionization enthalpy is the energy required to remove the most loosely bound electron from an isolated gaseous atom. As the size decreases as we move from left to right in a period because the valence shell come closer to the nucleus as we move from left to right. Thus, the removal of electron from the valence shell becomes difficult due to greater attraction between nucleus and valence electron. Thus, the ionization enthalpy of alkaline earth metals is more than that of alkali metals.
Basicity of oxides decrease as the metallic character of the metal decreases. And as metallic character decreases on moving across a period. Basicity of oxides of alkaline earth metals is lesser than that of basicity of alkali metals.
5. This particle has a positive charge
O Protons
Neutron
Electron
A flask containing a volume of 180 L of bromine was collected under a pressure of 35.5 kPa. What pressure would have been required for the volume of the gas to have been 80.0 L, assuming the same temperature? Which gas law did you need to use?
Answer:
P₂ = 80 KPa
Boyle's law is applied.
Explanation:
Given data:
Initial volume = 180 L
Initial pressure = 35.5 KPa
Final pressure = ?
Final volume = 80.0 L
Solution:
The given problem will be solved through the Boyle's law,
"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"
Mathematical expression:
P₁V₁ = P₂V₂
P₁ = Initial pressure
V₁ = initial volume
P₂ = final pressure
V₂ = final volume
Now we will put the values in formula,
P₁V₁ = P₂V₂
35.5 KPa × 180 L = P₂ × 80.0 L
P₂ = 6390 KPa. L/ 80.0 L
P₂ = 80 KPa
WHICH LETTER GOES WITH EACH QUESTION
-
The different forms of a gene are each called an __________.
-
Traits are features that are coded for in _________ and can be inherited.
-
___________ developed principles of genetics by experimenting with pea plants.
-
The temperature in which an organism lives is an example of an __________ environmental influence.
-
The law of ___________ states that a parent can pass only one allele for each trait to its offspring.
-
The trait that only appears when both alleles are present is called __________.
-
A sequence of DNA that directs a cell to make a protein is a ________.
-
Millions of __________ have become extinct in the history of the Earth.
A.
allele
B.
segregation
C.
species
D.
gene
E.
recessive
F.
DNA
G.
Mendel
H.
dominant
I.
external
The ________ produce egg cells and they _________ produce sperm.
Answer:
the females make eggs and males make the sperm
Explanation:
Answer:
uterus and sperm
Explanation:
2. If you take a 12.0L balloon of oxygen, at 1.00 atm, and increase the pressure to
4.00atm, what is the new volume?
A) 3.00 L
B) 6.00 L
C) 12.0L
D) 24.0 L
Answer:
A i s t h e a n s w e r i t h i n k . .
How many molecules are contained in 2.34 moles of carbon monoxide?
Answer:
1.409 × 10²⁴ moleculesExplanation:
The number of carbon monoxide molecules can be found by using the formula
N = n × Lwhere n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
N = 2.34 × 6.02 × 10²³
We have the final answer as
1.409 × 10²⁴ moleculesHope this helps you
If 38.55 mL of HCl is required to titrate 2.150 g of Na2CO3 according to the following equation, what is the molarity of the HCl solution? Na2CO3 + 2HCl (aq)→ 2NaCl (aq) + CO2 (g) + H20 (1)
The molarity of the HCl solution : 1.052 M
Further explanationGiven
Volume of HCl = 38.55 ml
mass of Na₂CO₃ (MW=106 g/mol)=2.15 g
Reaction
Na₂CO₃(aq) + 2HCl (aq)→ 2NaCl (aq) + CO₂ (g) + H₂0 (l)
Required
The molarity of the HCl solution
Solution
mol Na₂CO₃ :
[tex]\tt mol=\dfrac{mass}{MW}=\dfrac{2.15}{106}=0.02028[/tex]
From the equation, mol ratio Na₂CO₃ : HCl = 1 : 2, so mol HCl :
[tex]\tt mol~HCl=2\times 0.02028=0.04056[/tex]
The molarity :
[tex]\tt M=\dfrac{n}{V}=\dfrac{0.04056}{0.03855~L}=1.052~M[/tex]
Write the word equation for photosynthesis. A) What are reactants? B) What are the products?
Answer:
The reactants for photosynthesis are light energy, water, carbon dioxide and chlorophyll, while the products are glucose (sugar), oxygen and water.
If the statement is true, select True. If it is false, select False.
In an exothermic reaction, products have more energy than reactants.
True
False
Answer:
false
Explanation:
exothermic are those reactions in which energy is released.so reactant have more energy which transform into product
If the statement is true, select True. If it is false, select False.
In a polar bond, one atom pulls on the shared electrons more than the other atom.
True
False
Answer:
xiyducjfuxudjfjfjjffjfhhfudjdjdjdudud
Answer:
I dont knew this question what level this question. are asking for a friend
