Answer:
rtyuioroiytryu
Explanation:
Please tell me the answers
which one is mixture or solution
I will mark him or her as well done brilliant and thank you
Answer: Milk and chocolate/ oil and water are solution whereas fruit salad and air are mixtures
The table shows data from an experiment designed to find a solution that is both an acid and a strong electrolyte. Based on the data, which solution is the best acidic electrolyte.
Solution 1, 2, 3, or 4? Thank you!!!
Answer:
Solution 4 is the best acidic electrolyte
Explanation:
An acidic medium such as a solution has a pH that is less than 7. The acidity of the medium increases with decrease in the pH value. Acidic solutions turn blue litmus solution red. They produce hydrogen ions as positive ions solution as well as a negatively-charged ion.
An electrolyte is a solution which allows electric current to pass through it and in the process is decomposed by the electric current. Electrolytes are able to allow current flow through them because they are composed of negatively and positively-charged molecules known as ions which are responsible for carrying electrical charges. A good electrolyte will be a solution which conducts electricity freely.
Based on the data in the table, the solution that is both acidic and has high electrical conductivity is solution 4. Solution 4 turns blue litmus solution red indicating that it is acidic. Also, it has a low pH of 2.0 indicating that it is very strongly acidic.
Therefore, solution 4 is the correct option.
A female rabbit had 4 babies. For phenotypes: two of the babies were black and two of the babies were white. In rabbits, the allele for black fur (B) is dominant to the allele for white fur (b). Identify the genotypes of the mom and dad rabbit and complete the Punnett square to show how the 4 babies got their fur color.
Answer:put the rabbits mixed
Explanation:
What is the hydrogen ion concentration of 0.450M solution of acetic acid (HC2H3O2), if the ionization constant(Ka) is 2.19 x 10-5?
Answer:
3.02 Mm
Explanation:
explain what you understand by valency, give examples
Answer:
Valency is defined as the number of hydrogen atoms which combine directly or indirectly with one atom of an element.
Example:
One atom of nitrogen combines with three atoms of hydrogen to form ammonia gas. So, the valency of nitrogen is 3.
5. Which particle can not be accelerated by the electric
or magnetic fields in a particle accelerator?
A) neutron
B) proton
C) alpha particle
D) beta particle
Answer:
A. neutron
Explanation:
Neutrons cannot be accelerated in an electric or magnetic field because they are neutral in charge.
1. The motion of an object with constant acceleration is also known as ________. *
Motion
Uniform Motion
Constant Motion
Uniformly Accelerated Motion
2. A sepaktakraw ball is hit vertically upward by a player. What is its acceleration after 1 second? *
0
1 m/s2
19.8 m/s2
-9.8 m/s2
3. If a freely falling ball is somehow equipped with a speedometer, by how much would its speed-reading increase for every second? *
0 m/s
9.8 m/s
10 m/s
20 m/s
4. It is any motion of a body where gravity is the only force acting upon it (no friction or air resistance). *
freefall
gravity
acceleration
velocity
5. Objects fall at constant acceleration also known as acceleration due to gravity equivalent to *
1 point
9.8 m/s
9.8 m2/s
-9.8 m/s2
20 m/s
For questions 6-10, consider the illustration below.
6. At what angle of release makes the projectile reach the maximum height? *
15°
30°
45°
60°
75°
60° & 30°
30° & 75
7. Which of the following pairs of angles will make projectiles reach the same range? *
15°
30°
45°
60°
75°
60° & 30°
30° & 75
8. Which angle of release makes the projectile reach the longest range? *
15°
30°
45°
60°
75°
60° & 30°
30° & 75
9. Which angle of release are complementary angles? *
15°
30°
45°
60°
75°
60° & 30°
30° & 75
10. At what angle should a water hose be aimed for the water to land with the greatest horizontal range?
15°
30°
45°
60°
75°
60° & 30°
30° & 75
11. Which of the following statements describes momentum? *
the product of body's mass and velocity
the sum of body's mass and velocity
the product of body's mass and acceleration
the sum of body's mass and acceleration
12. Two identical cars are travelling along EDSA. Which of the two cars would have a greater momentum? *
the slower car
the faster car
both have the same momentum
13. Which has more momentum, a huge truck that is not moving or a bicycle that is moving? *
truck
bicycle
both have the same momentum
14. What are the two factors that affect the momentum of an object? *
velocity and time
force and velocity
mass and velocity
acceleration and force
15. Which has more momentum, a heavy truck moving at 30 km/h or a light truck moving at 30 km/hr? *
heavy truck
light truck
both have the same momentum
Answer:
i can't answer sorry
Explanation:
i had confused
Carbon monoxide has _____of oxygen.
One atom
Zero atoms
Two atoms
cho 6,5g muối sắt clorua tác dụng với dung dịch AgNO3 dư thu được 17,22g kết tủa. Công thức hóa học của muối sắt clorua là công thức nào? biết hệu suất phản ứng là 100%
Answer:
Công thức muối sắt là FeCl_3 nha bạn.
Which statement describes the energy changes that occur as bonds are brokes and a chemical reaction
Answer:
Energy is released when bonds are broken, and energy is absorbed when bonds are formed.
Phosphorous is prepared according to the following equation: Ca3(PO4)2 + 3SiO2 + 5C = 3CaSiO3 +5CO + 2P
What mass of phosphate rock (Ca3(PO4)2) is necessary to produce 9700. kg of phosphorous?
Answer:
48546.7kg or 48546745g
Explanation:
so from this u can work out the amount of moles in phosphorous by doing mass / mr you have to convert the mass in kg to g so you times it by 1000. then divide it by 31 which is the mr of phosphorous. then u can use the molar ratio which is 2:1 . Then use the equation mass= moles*mr
so 97000*1000/31=312903moles
2:1
so 312903/2=156451 moles of ca3(PO4)2
so mass= moles*mr
156451*310.3=48494g
hope this helps u to understand(*°▽°*)
Adam is doing a science project. He wants to find out how the height of the Sun affects the length of shadows. He will measure the shadow of his house at different times. He will see when the shadow is the longest.
Which is a scientific prediction Adam could make about his project?
A.
The Sun is highest at noon.
B.
The shadow will be longest in the morning.
C.
My shadow is shorter than the shadow of my house.
D.
I found out that the shadow is shortest at noon.
Answer:
d I think there's two answer
Explanation:
or c
Properties are used to identify substances of chemicals. As long as the type of substance does not change, it’s properties will not change. Which of the following is NOT a property (because it can change depending on the location)
Shiny
Odorous (smelly)
Weight
Black
Match each element or compound with the appropriate symbol or molecular formula. Carbon dioxide CO2 carbon o oxygen Н H water с hydrogen H2O
Answer:
Carbon dioxide ---> CO₂
Water ----> H₂O
Carbon ---> C
Oxygen ----> O₂
Hydrogen ----> H₂
Explanation:
The molecular formula of an element or compound is a formula which represents the composition of a molecule of that element or compound. It consists of the formula representing the atoms present as well as the number of atoms of each element innthe compound written as subscript innthe formula of the element or compound.
The molecular formula of the given elements and compounds are given below:
Carbon dioxide ---> CO₂
Water ----> H₂O
Carbon ---> C
Oxygen ----> O₂
Hydrogen ----> H₂
The molecular formula of carbon dioxide shows that in a molecule of carbon dioxide, there are two atoms of oxygen and one atom of carbon present in a molecule of carbon dioxide.
The molecular formula of water shows that are two atoms of hydrogen and one atom of oxygen present in a molecule of water.
The molecular formula of carbon shows that there are one carbon atoms in a molecule of carbon.
The molecular formula of oxygen shows that there are two oxygen atoms in a molecule of oxygen gas.
The molecular formula of hydrogen shows that there are two molecules of hydrogen in a molecule of hydrogen gas.
ASAP PLS
Identify the correct formula for each of the following compounds.
Carbon tetrabromide
4CBr
CBr4
C4Br
Chlorine monofluoride
ClF
FCl
Cl1F1
Answer:
1.CBr4
2.CIF
Explanation:
Covalent compound are formed by sharing of electron and ionic compound formed by complete transfer of electron. The chemical formula for Carbon tetrabromide is CBr₄ and for Chlorine monofluoride is ClF.
What is chemical Compound?Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.
Ionic compounds are more stronger than covalent compound. Ionic compounds have higher melting and boiling point than covalent compounds.
The chemical formula for Carbon tetrabromide is CBr₄, tetra means four. The chemical formula for Chlorine monofluoride is ClF, mono means one.
Therefore, the chemical formula for Carbon tetrabromide is CBr₄ and for Chlorine monofluoride is ClF.
To learn more about chemical compound, here:
https://brainly.com/question/26487468
#SPJ2
If you produce 35.7 grams of sodium chloride how many molecules of Chlorine gas were
needed?
2Na + Cl2 --> 2NaCl
(PLS HELP)
Answer: [tex]7.36\times 10^{23}[/tex] number of molecules of chlorine gas are needed.
Explanation:
The number of moles is defined as the ratio of the mass of a substance to its molar mass. The equation used is:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex] ......(1)
Given mass of sodium chloride = 35.7 g
Molar mass of sodium chloride = 58.44 g/mol
Plugging values in equation 1:
[tex]\text{Moles of sodium chloride}=\frac{35.7g}{58.44g/mol}=0.611 mol[/tex]
The given chemical equation follows:
[tex]2Na+Cl_2\rightarrow 2NaCl[/tex]
By the stoichiometry of the reaction:
If 1 mole of sodium chloride is produced from 2 moles of chlorine gas
So, 0.611 moles of sodium chloride will be produced from = [tex]\frac{2}{1}\times 0.611=1.222mol[/tex] of chlorine gas
According to the mole concept:
1 mole of a compound contains [tex]6.022\times 10^{23}[/tex] number of molecules
So, 1.222 moles of chlorine gas will contain = [tex]\frac{6.022\times 10^{23}}{1mol}\times 1.222mol=7.36\times 10^{23}[/tex] number of molecules
Hence, [tex]7.36\times 10^{23}[/tex] number of molecules of chlorine gas is needed.
Is hand washing a chemicals change or physicals change and why?
Answer:
If you wash your hands with soap, the soap molecules act as a link between the water you're washing with and the oil on your skin.
Explanation:
63) How many moles of CaBr
2
are in 5.0 grams of CaBr
2
2.
4.0 x 101 mol
2.5 x 10-2 mol
4.2 x 10-2 mol
1.0 x 10'mol
Answer:
I think it will be the answer
2.5 x 10-2 mol
I hope it help you
Which of the following correctly describes the role of the mouth in the digestive system?
The mouth acts like a muscular bag by churning the food and producing enzymes that aid in chemical digestion.
The mouth produces all of the enzymes needed for digestion and these enzymes are swallowed, which moves them through the digestive tract.
The mouth begins the process of digestion by mechanically breaking food into smaller pieces.
The mouth performs the peristalsis that pushes food through the rest of the digestive system.
Answer:
The mouth begins the process of digestion by mechanically breaking food into smaller pieces.
Explanation:
Digestion is a crucial process that involves the break down of complex food molecules into simpler ones that are assimilable by the body. The process of digestion in humans, for example, is said to begin in the MOUTH where the food enters through.
The mouth via the use of teeth helps the initially break down the food particles using mechanical/physical method. This further helps the break down of the food into tiny particles before they are acted on enzymatically.
(b) When water reacts with potassium metal the hydrogen produced ignites explosively
on the surface of water.
(ii) Write an equation to show how this ignition occurs.
2K(s) + 2H2O(l) → 2KOH(aq) + H2(g)
A student creates a model of a closed ecosystem by filling a glass tank half
full with water, then adding 10 snails and two small aquatic plants. The next
day, all the snails are dead. What is the most likely cause of their death?
A. The rates of cellular respiration and photosynthesis in the tank
were both too high.
B. The rates of cellular respiration and photosynthesis in the tank
were both too low.
O C. The rate of cellular respiration in the tank was much higher than
the rate of photosynthesis.
D. The rate of photosynthesis in the tank was much higher than the
rate of cellular respiration.
SUBMIT
e
PREVIOUS
Answer:
C. The rate of cellular respiration in the tank was much higher than
the rate of photosynthesis
Explanation:
In nature, cellular respiration and photosynthesis are opposite metabolic reactions. Cellular respiration, which is the process of releasing energy, requires oxygen while photosynthesis, which is the process of manufacturing foods by green plants, releases oxygen into the atmosphere. The two equations are as follows:
Photosynthesis:
6CO2 + 6H2O → C6H1206 + 6O2 (oxygen released)
Respiration:
C6H1206 + 6O2 (oxygen used) → 6CO2 + 6H2O
According to this question, 10 snails and two small aquatic plants were added to a closed glass tank half full with water. It was observed that all the snails died. This is most likely due to the fact that the rate of cellular respiration in the tank was much higher than the rate of photosynthesis.
In other words, the usage of oxygen via cellular respiration was much higher than the release of oxygen via photosynthesis.
Answer:
1. Snails carry out respiration only
2. Aquatic plants carry out both respiration and photosynthesis Although the aquatic plants can absorb carbon dioxide and release oxygen through photosynthesis, the amount of snail is much more than that of the aquatic plants.
During night time,the absence of light prevent the plants from carrying out photosynthesis. No oxygen is released at this time. There is a net release of carbon dioxide in the closed system and hence the snail died of suffocation.
A gas initially has a volume of 300. mL at a pressure of 1.0 atm, what will the
new volume be if the pressure is doubled? (assume constant temperature)
If 11 kJ of heat is transferred to 2300 g of soil at 21°C, what would the new temperature of the soil be?
Answer:
26.98°C
Explanation:
Applying,
Q = cm(t₂-t₁)................ Equation 1
Where Q = Heat transferred to the soil, c = specific heat capacity of dry soil, m = mass of the soil, t₂ = final temperature, t₁ = initial temperature.
From the question,
Given: Q = 11 kJ = 11000 J, m = 2300 g = 2.3 kg, t₁ = 21°C
Constant: c = 800 J/kg.°C
Substitute these values into equation 1
11000 = 800×2.3(t₂-21)
Solving for t₂
t₂-21 = 11000/(800×2.3)
t₂-21 = 11000/1840
t₂-21 = 5.98
t₂ = 5.98+21
t₂ = 26.98°C
If 81g of water is measured out, how many moles are in the sample? *
A. 4
B. 5
C. 2.5
D. 4.5
Answer:
D
Explanation:
because moles = mass /mr
so 81/18(mr of H2O=2+16)
moles =4.5
hope this helps:)
How and why do ionic bonds form?
Answer:
an iconic bond is formed by the complete transfer of some electrons from one atom to another
Explanation:
the atom losing one or more electrons become a cation. a positively charged ion the atom gaining one or more electrons become an anion. a negatively charged ion
how are molarity and volume related
these are the options
A They are directly related.
B They are inversely related.
C They are different units of dilution.
D They are different units of concentration.
Answer:
Molarity can be used to calculate the volume of solvent or the amount of solute. The relationship between two solutions with the same amount of moles of solute can be represented by the formula c1V1 = c2V2, where c is concentration and V is volume.
The relationship between Molarity and volume of a solution is : ( B ) They are inversely related
What is molarity ?Molarity is the number of moles of solute in unit of volume of the solution ( usually per liter ). Molarity is calculated by dividing the number of moles of a solute ( n ) by the volume of the solution.
Molarity = n / v .
Therefore we can conclude that the relationship between Molarity and volume is that they are inversely related.
Learn more about Molarity : https://brainly.com/question/17138838
Which represents a balanced nuclear equation?
WHY DOES TEMPERATURE REMAIN CONSTANT DURING CHANGE OF STATE
QUESTION
WHY DOES TEMPERATURE REMAIN CONSTANT DURING CHANGE OF STATE
[tex]\huge\mathbb{\red A \pink{N}\purple{S} \blue{W} \orange{ER}}[/tex]
[tex]\orange{\underline{\huge{\bold{\textit{\green{\bf{REASON}}}}}}}[/tex]
The energy in the form of heat which is supplied to the body is used in the breaking of the bonds to change its State. when changing from low energy state to high energy state
The energy in the form of heat which is released out is released when bonds r formed to change the state . when changing from high energy state to low energy state.
so net change in temperature is zero bez the heat received and released is always used.
Which sequence represents a portion of a
homologous series of hydrocarbons?
1.
C2H2, C2H4, C2H6
2.
C2H2, C3H4, C6H6
3.
C2H4, C3H4, C4H4
4.
C2H4, C3H6, C4H8
Answer:
4. C2H4, C3H6, C4H8
this is the alkane homologous series of hydrocarbons.
Their general formula is CnH2n
you can check this fits for all these compounds
put n = 1, 2, 3 and so on
What is the total number of atoms in the formula
Ca(ClO3)2?
Answer:
9 atoms
Explanation:
Ca=1
Cl=2
O=6
add them all
answer
cl atom is 2
ca atom is 1
o atom is 6
