Answer:
blue curve on edge :)
Explanation:
What is the correct order for the development of the atomic model
Answer: I think it's A. C-A-D-B
Explanation:
John Dalton's theory was publicized in 1803
J.J Thomson's theory was publicized in 1904
Ernest Rutherford's theory was publicized in 1911
And Neil Bohr's was publicized in 1926
dentify the base in this acid-base reaction:
Upper N a upper O upper H plus upper H upper C l right arrow upper N a upper C l plus upper H subscript 2 upper O.
NaOH
HCl
NaCl
H2O
Answer:
NaOH
Explanation:
Sodium hydroxide is the base in the acid-base reaction as all other acids and sodium chloride is salt and water is neutral.
What is a base?According to the Arrhenius concept, base is defined as a substance which yields hydroxyl ions on dissociation.These ions react with the hydrogen ions of acids to produce salt in an acid-base reaction.
Bases have a pH higher than seven as they yield hydroxyl ions on dissociation.They are soapy in touch and have a bitter taste.According to the Lowry-Bronsted concept, base is defined as a substance which accepts protons .Base react violently with acids to produce salts .Aqueous solutions of bases can be used to conduct electricity .They can also be used as indicators in acid-base titrations.
They are used in the manufacture of soaps,paper, bleaching powder.Calcium hydroxide ,a base is used to clean sulfur dioxide gas while magnesium hydroxide can be used as an antacid to cure acidity.
Learn more about base,here:
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I need help asap its due today!!!!!
Use the dichotomous key to answer the question. Of the following characteristics, which was used to classify insects?
A. presence of a head
B. shape of wings
C. number of wings
D. shape of abdomen
Answer:
B. shape of wings
Explanation:
Insect, (class Insecta or Hexapoda), any member of the largest class of the phylum Arthropoda, which is itself the largest of the animal phyla. Insects have segmented bodies, jointed legs, and external skeletons (exoskeletons).
Higher classification: Hexapoda
25 grams of methane (CH4) is placed inside a constant volume colorimeter. After the fuel is burned, the temperature rises by 45 degrees Celsius. If the heat capacity of the calorimeter is 5.57 kJ/C, what is the heat released?
An s w e r:
Explanation:
PLEASE HELP ME. REAL ANSWERS ONLY PLZ
Answer:
Please make it full I'm not seeing it
URGENT
What is the total volume of a lead can if it has a mass of 800g.
Answer:
750
Explanation:
Where on the pH scale would you find acids? Bases? What is unique about a pH of 7?
Answer:
Demonstrate familiarity with the pH scale ... body (excluding things like stomach acid) measure around 7.2 and 7.6 on the pH scale (a 7 is neutral on the scale). ... The pH of a solution is a measure of its acidity or alkalinity (base). ... Using a pH meter, you find the pH of an unknown solution to be 8.0.
Explanation:
Answer:
7 is neutral, acids are 1-6, bases are 8-14. Pure water has a pH of 7, where as almost everything else is either an acid or a base.
What do YOU think? Is the movement to 100% renewable energy possible? Why, or why not?
Answer:
i dont know
Explanation:
ask your science teacher
How is stoichiometry used to calculate the amount of product produced?
A. Stoichiometry measures the amount of product obtained.
B. Stoichiometry determines the molar mass of the product.
C. Stoichiometry calculates the grams of the limiting reagent.
D. Stoichiometry relates moles of product.
Answer:
Stoichiometry relates moles of reactant to moles of product
Explanation:
Just took the quiz :)
Answer:
Stoichiometry relates moles of reactant to moles of product.
Explanation: :)
i need help please thank you
Answer:
In science, sound is defined as the transfer of energy from a vibrating object in waves that travel through matter. Most people commonly use the term sound to mean what they hear when sound waves enter their ears. The tree above generated sound waves when it fell to the ground, so it made sound according to the scientific definition
Explanation:
sound waves
What is the total number of orbitals that can be found on third electron shell (n=3)? Answer with explanation
Answer:
nine orbitals
Explanation:
There are nine orbitals in the n = 3 shell. There is one orbital in the 3s subshell and three orbitals in the 3p subshell. The n = 3 shell, however, also includes 3d orbitals.
Plz answer will give BRAINLIEST! Promise! Question is in picture! Due in 5 minutes!!
Answer:
try A
Explanation:
Most of Earth's atmosphere is made up of nitrogen gas. Nitrogen can also
exist as a solid, liquid, or plasma. Four samples of nitrogen are each in a
different state but have the same mass. Which statement about the relative
amounts of thermal energy in the samples is true?
Answer:
it should be B (i did this wrk before)
Explanation:
1.Which type of text structure describes events in sequential order? A.sequence B.Cause and Effect. C. Problem And Solution. D. Compare and Contrast
2.This type of writing considers similarities and differences
A.Discripsion B.Compare and Contrast C. Sequence. D.Cause and Effect
3.in this type of writing,the reader will see words/phrases such as cause,as a result of,and due to.
A.Cause and Effect
B.Promlem and Solution
C.Order And Sequence
D.Compare And Contrast
Answer:
1 would be a. sequence
2 would be b. compare and contrast
3 would be a. cause and effect
PLEASE I NEED YOUR HELP, I WILL GIVE 10 POINTS PLEASEEEEE
People claim these rock formations in the Sahara Desert look like a mushroom and a chicken. They were not sculpted by humans. What do you think caused them to be shaped this way?
Answer:
Erosion
Explanation:
A gas has a volume of 240.0mL at 25.0 oC and 0.79 atm. Calculate its volume at STP (1 atm and 0 oC).
Answer:
189.6 mL
Explanation:
As per Boyles law when a gas is kept at a constant temperature and mass in a closed container, the volume and pressure vary inversely.
P1V1= P2V2
Here, P1 = 0.79 atm, V1 = 240 ml, P2= 1 atm
therefore, substituting values in above equation we get
0.79×240 = 1×V2
⇒V2 = 189.6 ml
therefore, its volume at STP (1 atm and 0 oC) = 189.6 ml
would the pressure exerted by the gas in the tank would increase if the scuba tank were to increase in temperature?
Answer:
In fact, a full scuba tank will gain about 5-6 psi for every degree of temperature increase. This is one reason that full tanks should not be left in a hot trunk of a car. A tank filled to 3000 psi could easily reach 3500 psi if the temperature of it increased substantially.
extremely hot.When a student went to open the car doo , he burned his finger. What two forms of energy were responsible for the student burning his fingers
Answer:
radiation and conduction
Explanation:
During a warm summer day, a car became extremely hot. When a student went to open the car door, he burned his fingers. What two forms of energy were responsible for the student burning his fingers?
Solution:
Heat is the transfer of energy from a warmer object to a cooler object. For heat transfer to occur, there have to be a difference in temperature between two objects.
Heat can be transferred in three ways: by conduction, by convection, and by radiation.
Conduction is the transfer of thermal energy between bodies through direct contact. Convection is the transfer of thermal energy through the movement of heat in a liquid or gas. Radiation is the transfer of thermal energy through thermal emission by electromagnetic waves.
During a warm summer day, The sun makes the car to become hot through energy transfer from the sun to the car. When the student touch the car, there is heat transfer as a result of conduction.
2) Liquid soap is dissolve in water to make a soap solution. Why is this
solution called a mixture?
Explanation:
Soap solution is called a mixture because you're combining a ratio of liquid soap and water to make a mixture.
When NH4SCN is added to a solution of Fe3+ ions, the solution changes from yellow to orange. What is the best explanation for this color change?
Answer:
The iron present in the solution is reduced because of the presence of SCN⁻ ions in solution
Explanation:
The clue in this problem is the color of the solution:
A solution of Fe³⁻ is yellow but when the Fe³⁺ is reduced by an oxidant to Fe²⁺ the solution change to orange color.
The SCN⁻ ion is a reducing agent than, in presence of a substance that can be reducted as Fe³⁺ ion will promote the reaction. That means the best explanation is:
The iron present in the solution is reduced because of the presence of SCN⁻ ions in solutionHow do atmospheric updrafts affect clouds?
Answer:
Updrafts characterize a storm's early development, during which warm air rises to the level where condensation begins and precipitation starts to develop. In a mature storm, updrafts are present alongside downdrafts caused by cooling and by falling precipitation.
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Have a great Day : P
what are the formulas for the products of the reaction:
calcium chloride+ silver nitrate
Answer:
CaCl2 + 2AgNO3 = Ca(NO3)2 + 2AgCl
Explanation:
Calcium chloride react with silver nitrate to produce calcium nitrate and silver(1) chloride
10. Which one of the following is not true about covalent bonds?
Most covalent substances do not dissolve well in water
Covalent bond can form polar and non polar bonds and shape
Covalent bond is one of the strongest bonds
Most of covalent substance does not conduct heat and electricity
Most covalent bonds have moderate to love melting and boiling point
Answer:
Most covalent bonds have moderate to love melting and boiling point
Explanation:
Most covalent compounds have relatively low melting points and boiling points.
The question is~ Which is not a biomass energy source?
Answer:
I think its sun but I'm not sure
How do collisions between molecules transfer energy from a system of
reacting substances to its surroundings?
A. They cause heat to flow from the system to the surroundings.
O B. They cause molecules to flow into the system from the
surroundings
C. They cause the potential energy of the system to increase
D. They cause the thermal energy of the surroundings to decrease.
Answer:
A. They cause heat to flow from the system to the surroundings.
Explanation:
Answer:
A. They cause heat to flow from the system to the surroundings.
Explanation:
a p e x , just took the quiz
A tank consists of a gaseous mixture of 3.83 g of triselenium diiodide, 2.62 g of ammonium telluride, and 1.82 g of iridium (i) sulfate. What is the partial pressure in atm of ammonium telluride if the total pressure in the tank is 2.795 atm?
Answer: The partial pressure in atm of ammonium telluride is 1.48 atm
Explanation:
According to Raoult's law, the partail pressure of a component at a given temperature is equal to the mole fraction of that component multiplied by the total pressure
[tex]p_A=x\times p_{total}[/tex]
where, x = mole fraction
[tex]p_A[/tex] = partial pressure of A
[tex]p_{total}[/tex] = total pressure
[tex]x_{\text {ammonium telluride}}=\frac{\text {moles of ammonium telluride}}{\text {total moles}}[/tex],
[tex]x_{\text {ammonium telluride}}=\frac{\frac{2.62g}{164g/mol}}{\frac{2.62g}{164g/mol}+\frac{3.83g}{333g/mol}+\frac{1.82g}{673g/mol}}=0.53[/tex]
[tex]p_{\text {ammonium telluride}}=0.53\times 2.795atm=1.481atm[/tex]
Thus the partial pressure in atm of ammonium telluride is 1.48 atm
How many grams of NaCl is needed to make 750mL of a 2.4 M NaCl solution?
Answer:
Molarity of the solution = 3.000 M
Volume of the solution = 250.0 mL = 0.25 L
moles in 250.0 mL = molarity x volume of the solution
= 3.000 M x 0.25 L
= 0.75 mol
Hence, 0.75 mol of NaCl is needed to prepare 250.0 mL of 3.000 M NaCl solution.
Moles (mol) = mass (g) / molar mass (g/mol)
Moles of NaCl in 250.0 mL = 0.75 mol
Molar mass of NaCl = 58.44 g/mol
Mass of NaCl in 250.0 mL = Moles x Molar mass
= 0.75 mol x 58.44 g/mol
= 43.83 g
Hence, 43.83 g of NaCl is needed to prepare 250.0 mL of 3.000 M solution.
Explanation:
¿Cuántos gramos de dicloruro de manganeso se obtienen cuando reaccionan 7,5 g de ácido clorhídrico? MnO2 + 4 HCl = Mn Cl2 + Cl2 + 2 H2O *
Answer:
6.6 g
Explanation:
La ecuación de la reacción es;
MnO2 + 4 HCl -------> MnCl2 + Cl2 + 2H2O
Número de moles de HCl que reaccionan = 7.5g / 36.5 g / mol = 0.21 moles
Dado que;
4 moles de HCl producen 1 mol de MnCl2
0,21 moles de HCl producen 0,21 * 1/4 = 0,0525 moles de MnCl2.
Masa de MnCl2 = 125,844 g / mol * 0,0525 moles = 6.6 g
List as many things as you can see in the picture below
Abiotic (Non-Living)___________Biotic (Living)
__________________ ................ ___________________ __________________ ................ ___________________
___________________ ___________________
1
What is the mass of 0.328 mol of CO2?
Answer:
use this conversation units to help you hope it helps