It is a base because its pH is greater than 7
(not sure about the second sorry!)
How does energy from the Sun drive the cycling of matter?
Answer:
solar energy drives the cycle by evaporating water from the oceans, lakes, rivers, and soil. As liquid water evaporates or transpires, it forms water vapor and clouds, where water droplets eventually gain enough mass to fall back to Earth as precipitation.
¿Las cargas eléctricas forman parte de los átomos?
Answer:
si. en los atomos los protones y los electrones llevan cargas electricas
2. An atom of Be has four protons, five neutrons and four electrons. What 10 poin
is the mas of Be? *
O a.4
b. 5
c. 1
09
Answer:
Five ( 5 ) is the correct answer
Periodic table 50 elements with thier valancies
Answer:
The first 50 elements along with their valences are given below :
1. Hydrogen = 1
2. Helium = 0
3. Lithium = 1
4. Beryllium = 2
5. Boron = 3
6. Carbon = 4
7. Nitrogen = 3
8. Oxygen = 2
9. Fluorine = 1
10. Neon = 0
11. Sodium = 1
12. Magnesium = 2
13. Aluminium = 3
14. Silicon = 4
15. Phosphorus = 3
16. Sulphur = 2
17. Chlorine = 1
18. Argon = 0
19. Potassium = 1
20. Calcium = 2
21. Scandiun = 3
22. Titanium = 3
23. Vanadium = 4
24. Chromium = 3
25. Manganese = 4
26. Iron = 2
27. Cobalt = 2
28. Nickel = 2
29. Copper = 2
30. Zinc = 2
31. Gallium = 3
32. Germanium = 4
33. Arsenic = 3
34. Selenium = 2
35. Bromine = 1
36. Krypton = 0
37. Rubidium = 1
38. Strontium = 2
39. Yttrium = 3
40. Zirconium = 4
41. Niobium = 3
42. Molybdenum = 3
43. Technetium = 7
44. Ruthenium = 4
45. Rhodium = 3
46. Palladium = 4
47. Sliver = 1
48. Cadmium = 2
49. Indium = 3
50. Tin = 4
Note :
An element like Iron, copper can have more than one valencies.
Answer:
50 elements chemical eq, atomic number, atomic mass, no.of electrons, no.of protons, no.of neutrons, electronic configuration and valancies are given in the above attachment
Explanation:
Hope it helps you
How many moles are in 25.0 grams of HF?
Answer:
Hey mate.....
Explanation:
This is ur answer.....
So,
If one mole has a mass of 18 grams, 25 grams would have a mass of 25 grams/ 18 grams per mole or 1.39 moles.
Hope it helps!
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Answer:
1.39 moles............
The system international (SI) unit for energy is:
Question
The system international (SI) unit for energy is:
Answer: joule
PLZ BRAINLIEST+THANKS :)
Food chains always begin with what type of organism? Why?
Which applies to fusion? Check all that apply.
involves the splitting of nuclei
takes place in the Sun
releases radiation as a waste product
occurs in nuclear power plants and is used to generate electricity
plays a role in the production of essentially all elements heavier than helium
releases large amounts of energy
Answer: B, E, and F
Explanation: It showed the correct answer after i got it incorrect. (E2021)
Answer:
A
B
D
E
Explanation:
GOT IT RIGHT ON MY ASSIGNMENT
Is a mixture with the same composition throughout
Answer:
A homogeneous mixture
Explanation:
A homogeneous mixture has the same composition throughout
pls help will give 20 points and brainliest!!! im desperate!!
The line starts at the bottom because it's the starting point. (You have to start somewhere, If that makes sense.)
I also noticed that the line is going up, which means she's going farther (in distance and time)
The line is straight which means she's going constant speed.Acid rain due to air pollution when water reacts with sulfur dioxide, nitric oxide, and carbon dioxide, causes
Answer:
Acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. These substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.
Explanation:
What is required to make a fire? Is it exothermic or endothermic?
Answer:
Combustion as an Exothermic Reaction
Explanation:
When substances burn, they usually give off energy as heat and light. The combustion of wood is an exothermic reaction that releases a lot of energy as heat and light.
Answer:
Exothermic
Explanation:
because exothermic causes fires while endothermic doesn't
What makes an atom stable?
a. Having the nucleus in the center
b. Being very small
c. Being neutral
d. Having the right number of protons and neutrons
How much energy is released when 6.0 g of water is condensed from water to vapor?
Answer:6.0g x 1 mol/18.02g x 40,65 kJ/mol
Explanation: just did the quiz
13.6 kilojoules (kJ) of energy is released when 6.0 g of water is condensed from water to vapor.
To calculate the energy released when 6.0 grams of water is condensed from water to vapor, we need to use the concept of heat of vaporization (also known as enthalpy of vaporization). The heat of vaporization is the amount of energy required to change one gram of a liquid into vapor at its boiling point, without any change in temperature.
The heat of vaporization of water is approximately 40.7 kJ/mol at its boiling point (100°C or 373.15 K). We can use this information to calculate the energy released when 6.0 grams of water is condensed.
Step 1: Calculate the number of moles of water (H₂O) in 6.0 grams.
Molar mass of water (H₂O) = 2 g/mol (for hydrogen) + 16 g/mol (for oxygen) = 18 g/mol
Number of moles of water = Mass of water / Molar mass of water
Number of moles of water = 6.0 g / 18 g/mol = 0.333 moles
Step 2: Calculate the energy released during condensation.
Energy released = Number of moles of water × Heat of vaporization
Energy released = 0.333 moles × 40.7 kJ/mol = 13.6 kJ
Therefore, approximately 13.6 kilojoules (kJ) of energy are released when 6.0 grams of water is condensed from water to vapor.
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A student collects 25 mL of gas at 0.98 bar. What volume would this gas occupy at 1.013 bar? * 3 points 25.8 mL 24.2 mL .09 mL 34.7 mL
Answer:
24.2 mL.
Explanation:
Assuming constant temperature, we can solve this problem using Boyle's law, which states:
P₁V₁=P₂V₂Where:
P₁ = 0.98 barV₁ = 25 mLP₂ = 1.013 barV₂ = ?We input the data:
0.98 bar * 25 mL = 1.013 bar * V₂And solve for V₂:
V₂ = 24.18 mLThe closest option is the second one: 24.2 mL.
The characteristics of two unknown intermolecular forces, X and Y, are compared in the table.
Intermolecular Forces
х
Y
Occurs between molecules with instantaneous dipoles Occurs between molecules with permanent dipoles and ions
Which of the following conclusions about the two intermolecular forces is correct?
X represents London dispersion forces, and Y represents ion-dipole forces.
X represents dipole-dipole forces, and Y represents ion-dipole forces.
X represents hydrogen bonding, and Y represents dipole-dipole forces.
X represents London dispersion forces, and Y represents dipole-dipole forces.
Answer:
X represents London dispersion forces, and Y represents ion-dipole forces.
Explanation:
London forces occurs between molecules that are normally non-polar (electrically symmetric). It arises from instantaneous dipoles in molecules. It occurs in all substances.
Permanent dipoles are caused by non-symmetric electron distribution in molecules leading to a permanent dipole in the molecule such as in HCl. Interaction between the permanent dipole in these molecules and an ion is called ion-dipole interaction.
Hence; X represents London dispersion forces, and Y represents ion-dipole forces.
X represents London dispersion forces, and Y represents ion-dipole forces.
London forces:
London forces occurs between molecules that are normally non-polar (electrically symmetric). It arises from instantaneous dipoles in molecules. It occurs in all substances.For example: F₂, I₂Ion-dipole forces:
Permanent dipoles are caused by non-symmetric electron distribution in molecules leading to a permanent dipole in the molecule such as in HCl. Interaction between the permanent dipole in these molecules and an ion is called ion-dipole interaction.For example: sodium ion [tex](Na^+)[/tex]and water molecule[tex](H_2O)[/tex]Hence; X represents London dispersion forces,
and Y represents ion-dipole forces.
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If you react 59.54 g of S and 78 g of HNO3, how many grams of NO2 can you
theoretically produce?
S + 6 HNO3 + H2SO4 + 6 NO2 + 2 H2O
Answer:
56.94759 grams of NO2
Explanation:
Stoichiometric Equation:
1 S + 6 HNO3 → 1 H2SO4 + 6 NO2 + 2 H2O.
This is so you can create ratios between each compound in the reaction, and identify the limiting and excess reactants to determine exactly how much can be produced?
The coefficients or molecular quantity of each compound in the balanced equation represents the amount of moles.
To figure out how much can be produced, you have to convert 59.54 g of S into moles of S and 78 g of HNO3 into moles of HNO3.
A reference such as a periodic table can be very helpful as it has the atomic mass of each element which is the mass with respect to 1 mol of that element.
A gas has the volume of 45mL at 25 C is heated to 50 C. What is the new volume of the gas? P1V1 = P2V2 V1/T1 = V2/T2 PV = nRT V1/T1 x V2/T2
Answer:
Option b (V1/T1 = V2/T2) is the right alternative or the new volume will be "0.048 L".
Explanation:
The given values are:
Temperature,
T₁ = 25°C
or,
= 298.15 K
T₂ = 50°C
or,
= 323.15 K
Volume,
V₁ = 45 mL
or,
= 0.045 L
V₂ = ?
As we know,
⇒ [tex]\frac{V_1}{T_1} =\frac{V_2}{T_2}[/tex]
Or,
⇒ [tex]V_2=\frac{V_1\times T_2}{T_1}[/tex]
On substituting the values, we get
⇒ [tex]=\frac{0.045\times 323.15}{298.15}[/tex]
⇒ [tex]=\frac{14.541}{298.15}[/tex]
⇒ [tex]=0.048 \ L[/tex]
w
In your own words, what does the law of
conservation of energy tell us? Hint: It is
VERY similar to the law of conservation
of matter (we studied that in the first
semester).
Answer:
The law of conservation of mass States that matter can never be created or destroyed during c
Which describes farsightedness?
Distant objects are blurry.
Concave lenses can correct it.
hurrry plz
Objects appear larger when wearing corrective glasses.
Corrective glasses do not change apparent the size of objects.
To solve this we must have a claeas concept behind Farsightedness and nearsightedness. Therefore, distant objects are blurry, describes farsightedness. The correct option is option A.
What is farsightedness?Farsightedness (hyperopia) is a common visual issue in which you can clearly see far things but have fuzzy vision of nearer items. Your capacity to focus is affected by your degree of farsightedness.
Farsightedness is most usually caused by an eyeball that is too short or by a cornea (the transparent layer at the front of the eye) that is not curved enough. Light cannot focus directly on the retina due to these two issues. Light instead concentrates behind the retina, making close-up objects appear fuzzy.
Therefore, distant objects are blurry, describes farsightedness. The correct option is option A.
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2-ciclopropilpropano
Answer:
cool
Explanation:
The minimum stream velocity necessary to transport a sediment particle that is 0.1 centimeter in diameter is closest to
Answer:
5.0 cm/s
Explanation:
Q = V * A
given that the diameter of the particle = 0.1 cm
V = stream velocity , A = cross sectional area of stream , Q = stream flow
For a particle with a diameter of 0.1 cm,
To determine the stream velocity we will use a stadia rod to measure at least 5 meters down ( depth of stream ) three times and then take the average value which will be used to determine the cross sectional area of the stream but Given that the width of the stream is not given the closet value to the stream velocity will be = 5.0 cm/s
differentiate between homogenous and heterogeneous catalysis
Explanation:
Homogeneous catalysts are those that occupy the same phase as the reaction mixture (typically liquid or gas), while heterogeneous catalysts occupy a different phase. Generally, heterogeneous catalysts are solid compounds that are added to liquid or gas reaction mixtures.
how conditions on Earth would be different if its axis of rotation were vertical instead of tilted.
Answer:
there would be different times because the sun and moon are in different places and one side would be sunny for a long time
Explanation:
Define what coal is, explain how it forms, and what it is
used for today
Answer:
the main use of coal in the United States is to generate electricity.
Coal is a combustible black or brownish-black sedimentary rock with a high amount of carbon and hydrocarbons
Coal is formed when dead plant matter decays into peat and is converted into coal by the heat and pressure of deep burial over millions of years.
The level of mercury in a barometer falls as the air pressure falls.
True
False
Real answers only or you will be reported and banned from brainly
Answer:True
Explanation:
The pressure in a car tire is 198 kPa at 27C. After a long drive, the pressure is 225 kPa.
What is the temperature of the air in the tire? Assume that the volume is constant.
How is the motion of particles in a book different from the motion of particles in the air around it ? (dont put link)
Answer:
the motion is different.
Explanation:
the the motion is different because the particle in a book is solid particles and solid are packed together so so they can't move freely but while the the particles in the air around it is gas particles and it are packed very loose and can move very easily anywhere like .Example - solid-book , eraser. gas-helium, oxygen.
an archer releases an arrow toward a Target the arrow travels 166 m in 2 seconds what is the speed of the arrow
the speed of arrow is 83m/per second
that means
83metres = 1 second
●The arrow would cover the distance of 83 metres in 1 second
may this helps you
bye
2. What element is found in compounds that control all chemical changes in your body?
Answer:
???????
Explanation: