Answer:
The atomic number is the number of the elements inside the periodic table and the mass is the weight or a number under the elements.
Explanation:
Correct me if I am wrong
Answer:
Atomic number
The number of protons in the nucleus of an atom.
Atomic Mass
The mass of an atom of a chemical element expressed in atomic mass units.
How do you know when a redox equation is balanced?
How much energy is needed to heat 9.3 grams of silver metal from 21 °C to 52 °C, if the
specific heat of silver metal is 0.240 J/g °C?
Question 5
4 pts
How much heat must be added if 160 grams of water is heated from 24 °C to 85 °C?
(The specific heat of water is 4.184 J/g °C)
Look at picture
ASAP please will mark as brainlist don’t got much time
Answer:
question 4. 69.19J
question 5. 40835.84J
Explanation:
question4.
heat needed = mass × specific heat capacity × change in temperature
= 9.3× 0.240×(52-21)
=69.192J
question 5.
heat added = 160× 4.184×(85-24)
= 40835.84J
PLEASE ANSWER URGENT Write the electron configurations for the following three atoms.
1. Nitrogen
2. Chlorine
3. potassium
Answer:
[He] 2s2 2p3
[Ne] 3s² 3p⁵
[Ar] 4s¹
Arrange the following atoms in order of decreasing atomic radius
Answer:
li
be
na
si
s
............. ..
Select the correct answer.
A substance is followed by the symbol (l) in a chemical equation. What does the symbol represent?
A.
The substance has the least molecules in the equation.
B.
The substance is in the liquid state.
C.
The substance is produced last in the reaction.
D.
The substance is dissolved in a liquid solution.
E.
The substance is lost at the end of the reaction.
Answer: choice b
Explanation:
What is the number of moles of 60.7 liters of oxygen molecules?
Answer:
2.17 moles of gas.
Explanation:
To prepare 800mL of 1M phosphate buffer of pH 7.2 (PKa=7.1), by using salt = K2HPO4 and acid = KH2PO4, the quantity of salt required is
Answer:
78.04g of 0.448 moles must be added
Explanation:
Using H-H equation we can find the pH of the buffer:
pH = pKa + log [A⁻] / [HA]
Where pH is the pH of the buffer = 7.2
pKa = 7.1
[A⁻] = [K₂HPO₄]
[HA] = [KH₂PO₄]
Replacing:
7.2 = 7.1 + log [K₂HPO₄] / [KH₂PO₄]
0.1 = log [K₂HPO₄] / [KH₂PO₄]
1.2589 = [K₂HPO₄] / [KH₂PO₄] (1)
And as the concentration of the buffer is:
1M = [K₂HPO₄] + [KH₂PO₄] (2)
Replacing (2) in (1):
1.2589 = 1M - [KH₂PO₄] / [KH₂PO₄]
1.2589 [KH₂PO₄] = 1M - [KH₂PO₄]
2.2589 [KH₂PO₄] = 1M
[KH₂PO₄] = 0.44M
And [K₂HPO₄] = 0.56M
In 800mL = 0.8L:
0.8L * (0.56mol / L) = 0.448 moles K₂HPO₄. The mass is -Molar mass K₂HPO₄: 174.2g/mol-:
0.448 moles * (174.2g / mol) =
78.04g of 0.448 moles must be addedI WILL GIVE BRAINLIST!!!!!!!!!!!!!!!!!!!!!! PLZZZZZZZZZ HELPPPPPPPPPPPPPP
Explain how proper motion will affect the constellation as seen from the earth.
What do atoms consist of?
Answer:
protons, neutrons, electrons
Answer:
Atoms consist of 3 particals:Protons,Neutrons,and Electrons
How can a compound not conduct electricity as solid but do so when liquid?
HELP
Explanation:
Ionic compounds conduct electricity when molten (liquid) or in aqueous solution (dissolved in water), because their ionsare free to move from place to place. Ionic compoundscannot conduct electricity when solid, as their ions are held in fixed positions and cannot move.
Which layer over time due to chemical and physical weathering leads to the other layers?
Answer:
chemical weathering occurs on the surface of minerals, the water and acids that control chemical weathering require access to the surface. Physical weathering breaks the rock to provide that surface
What is a function of the backbone in animals?
A. It protects against predators.
B. It regulates blood glucose.
C. It surround the spinal cord.
D. It limits movement.
I NEED A WORK EQUATION AGAIN HELLPPP PPLS!!!
Answer:
calcium+ethanoic acid= carbon dioxide + water
Zinc + ethanoic acid= zinc ethanoate+water
Answer:
calcium + ethanoic acid → calcium ethanoate + water
zinc + ethanoic acid → zinc ethanoate + water
Which statement best explains a way in which a cell gets rid of wastes?
Answer:
I would say B but you don't have to take my word for it
Answer:
D
Explanation:
The plantlets are uniform.
Answer:
yes they are < 3
Explanation:
How many atoms of tin are found in 3.50 moles of tin?
Answer:
2.11x10²⁴ atoms
Which of the 3 molecules: Methane, Propane, Butane would release the most energy when combusted?
Answer:
butane
Explanation:
How many grams of Sn will be created when 114 grams of SnO2 react with excess H2? SnO2 + H2 ->Sn + H2O
I
Explanation:
CNN vfbtgnynynynynyuybunujy
Help please I am so lost my teacher is no help
Answer:
B - CALCIUM
Explanation:
Hopes it helps
Why does lowering the pressure cause a liquid to boil?
A. It becomes easier for molecules to escape.
B. It pushes molecules out of the liquid.
C. It causes the temperature to rise.
D. It changes the volume of the liquid.
Lowering the pressure in a container will cause the liquid in the container to boil faster because it becomes easier for the molecules to escape.
What causes boiling?Boiling happens when the vapor pressure of a liquid equals the atmospheric pressure.
By lowering the atmospheric pressure, the vapor pressure of a liquid takes a lower time to equal the atmospheric pressure.
Thus, it becomes easier for the molecules of the liquid to escape from each other.
More on boiling and pressure can be found here: https://brainly.com/question/2510654
10. What two effects can the wrong pH have on an enzyme?
Answer:
A pH environment has a significant effect on an enzymes. It can affect the intramolecular forces and change the enzyme's shape -- potentially to the point where it is rendered ineffective. With these effects in mind, typical enzymes have a pH range in which they perform optimally.
Explanation:
I hope this helps you.
Why do surface waves break along the shore?
Answer:
because the global sea level rises while the poles temperature increases
Explanation:
Help PLs thnk you!!!!!!!!!!!!!!!!!!!!!!!!
In the cycle, after a new moon, _______________ means light appears on the _____________ side of the moon and continues to ________________.
Answer:
Explanation:
In the cycle, after a new moon, waxing means light appears on the right side of the moon and continues to increase.
Explain why the elements in group 7 have 7
valence electrons.
Answer:
The periodic table was made that way by the scientists who created it
Explanation:
to make things easier for the users.
Choose whether each statement is a scientific hypothesis, theory, or law. The pressure a gas exerts on a container increases as the temperature increases because the particles in the warmer gas move faster and collide with the walls of the container with more force.
Answer:
1) theory
2) law
3) hypothesis
Explanation:
edge 2021
A scientific hypothesis is a proposition that can be determined by experiments. If the gas container is heated, then the pressure inside will increase as shown by the hypothesis.
What is a scientific theory?A scientific theory is a statement that has been tested by a thorough experiment and by following the experimental procedure to evaluate the results. The increase in temperature increases pressure because particle moves rapidly shown in theory.
A scientific law is a statement that is proven true by repeated experiments. As the temperature of the gas increases the pressure also increases showing the law of the ideal gas equation.
Therefore, scientific theory, law, and hypothesis are different.
Learn more about scientific hypothesis here:
https://brainly.com/question/14074757
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What is one energy transformation that is taking place in the photo?
radiant energy to thermal energy
thermal energy to nuclear energy
chemical energy to thermal energy
radiant energy to chemical energy
Answer:
Radiant energy to chemical energy
Explanation:
Got it right on edge 2021
One energy transformation that is taking place in the photosynthesis process is radiant energy to chemical energy.
What is energy transformation?Energy transformation is the process in which one form of energy converted into another form of energy.
What is photosynthesis process?Photosynthesis process is defined as the process in which plants makes their own food by using the carbon dioxide, water and sunlight in the chlorophyll.
The balanced chemical equation of photosynthesis process is
6CO2 + 6H2O → C6H12O6 + 6O2.
Since, it have 6 atoms of carbon, 12 atoms of hydrogen and 18 atoms of oxygen on both side. So, it is balanced.
Since, sunlight which it take is in the form of radiant and convert it into chemical energy.
Thus, we concluded that the energy transformation that is taking place in the photosynthesis process is radiant energy to chemical energy.
learn more about photosynthesis process:
https://brainly.com/question/26568636
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How to convert 1348celsius to kelvin in stoichiometry reaction of a gas. The gas turned white not green.
Answer:
1621 K
Explanation:
How to convert 1348 celsius to kelvin
Celsius and Kelvin are both units for temperature. The relationship between both units is given as;
Kelvin (K) = Celsius ( °C ) + 273
Inserting the values from the question;
Kelvin (K) = 1348 + 273 = 1621 K
When energy is released by the pack, what happens to the energy of the surroundings (outside the pack)?
a. The energy increases
b. The energy decreases
c. The energy stays the same
Answer:
a
Explanation:
i hope that's correct
The energy of the surroundings (outside the pack) will:
a. The energy increases, when energy is released.
Energy in the surroundings:Energy is delivered to create bonds, which is the reason the enthalpy change for it is positive to break bonds. Energy is expected to break bonds. Particles are a lot more joyful when they are "wedded" and discharge energy since it is simpler and more steady to be seeing someone.
When energy is released, the energy in the surroundings will increase.
Thus, option a is correct.
Find more information about Energy here:
brainly.com/question/25959744
How many molecules are in 83.2 g of chlorine gas (Cl2)?
Group of answer choices
1.42 x 10^24 molecules
1.78 x 10^28 molecules
7.04 x 10^23 molecules
14.2 x 10^24 molecules
Answer:
Try everything or guess, that will always work
1.42 x 10^24 molecules
1.78 x 10^28 molecules
7.04 x 10^23 molecules
14.2 x 10^24 molecules
Explanation: