As you move down a group, you will recall that the radius increases. Why do you think an increase in atomic radius would result in a lower ionization energy?
Answer:
Because as we move down the group size/ radius of atom increases due to increase in shells and screening effect. The hold of nucleus on valence electrons decreases and effective nuclear charge decreases so it is easy to remove electron from greater sized atoms as compared to smaller sized aroms.
Energy required to remove electron is ionization energy so greater sized atoms have low ionization energy.
Explanation:
what has 16 protons and -2 charge? PLEASE NEED IT FOR FINALS FOR CHEMISTRY!!
Answer:
Sulfur
Explanation:
it has 16 proton and 2- charges
What pieces of evidence do scientists use to support the current theory of rapid expansion?
Answer:
When looking at the radiation emitted by distant stars or galaxies, scientists see emission spectra 'shifted' towards the red end of the electromagnetic spectrum—the observed wavelengths are longer than expected. ... Something causes the wavelength of the radiation (emitted by faraway stars and galaxies)
help is science, if you don't know the answer just don't put anything /:
Answer:
Light
Explanation:
Light is a good example of invisible particles. We cannot see light particles aka photon. We only know the light is present by the objects we see. Because we can only see objects when light reflects from them on our eyes.
[I could only think of one example if I can remember one more I'll edit it down]
When a car burns gas most of the energy is lost as heat. This inefficiency of energy transfer is an example of which law of energy?
A. second
B. fourth
C. first
D. third
Answer:
C) first
Explanation:
It may be harmful when people compete to see who can hold their breath the longest underwater. Without oxygen, brain cells *
Answer: Without oxygen, brain cells cannot make enough ATP.
Explanation:
Hypoxia is a condition that occurs due to low levels of oxygen. In conditions such as holding of breath for a long period of time, the oxygen carrying haemoglobin ( oxyhaemoglobin) breaks down, releasing oxygen to the body tissues, which constantly consumes oxygen keeping the levels low.
In the presence of decreased oxygen supply, autoregulatory mechanisms that control the blood flow to the brain by adjusting the diameter of the arterioles fails. The consequent rapid decrease in the cerebral blood supply leads to hypoxia and lack of glucose( decreased ATP production). If severe hypoxia is sustained for more than a few minutes, this could lead to irreversible brain damage.
Therefore, It may be harmful when people compete to see who can hold their breath the longest underwater.
Without oxygen, brain cells die as a result of the cells being unable to
metabolize glucose.
The brain is an important organ that controls almost all the activities that
takes place in the body. They have cells which converts the glucose to
energy which is needed for day to day activities.
When there is no oxygen, glucose isn't metabolized and energy is deficient.
The brain cells won't be able to function and then causes its cells to die
thereby resulting in brain damage.
Read more on https://brainly.com/question/20333433
The molar enthalpy of fusion for water is 6.008 kJ/mol. How much energy is released when 4.81 mol of water freezes?
Answer: The energy released when 4.81 mol of water freezes is 28.9kJ
Explanation:
Latent heat of fusion is the amount of heat required to convert 1 mole of solid to liquid at atmospheric pressure or energy released when 1 mole of liquid freezes to solid at atmospheric pressure.
[tex]\Delta H_{fusion}[/tex] = enthalpy change for fusion = 6.008 KJ/mole
Energy released when 1 mole of water freezes = 6.008 kJ
Energy released when 4.81 moles of water freezes = [tex]\frac{6.008 kJ}{1}\times 4.81mol=28.9kJ[/tex]
Therefore, the energy released when 4.81 mol of water freezes is 28.9kJ
The green pigment required for photosynthesis is:
A. glucose
B. chloroplast
C. chlorophyll
D. carbon dioxide
Activity
solve the problems below to practice what you have learned. Remember to use the formula for a heat transferred: Q=mC(T: - T:).
Part A
The specific heat of lead is 0.129 yg°C. Find the amount of heat transferred to lead when 355 grams are heated from 95°C to 140°C.
BIŲ x
Font Sizes
Characters used: 15000
Answer:
2060.775 J
Explanation:
From the question given above, we obtained the following data:
Specific heat capacity (C) = 0.129 J/g°C
Mass (m) = 355 g
Initial temperature (Tᵢ) = 95 °C
Final temperature (Tբ) = 140 °C
Heat (Q) tranfered =?
We can calculate the amount of heat transferred by using the following formula:
Q = mC(Tբ – Tᵢ)
Q = 355 × 0.129 (140 – 95)
Q = 45.795 × 45
Q = 2060.775 J
Thus, 2060.775 J of energy was transferred.
Answer:
2060.775 Joules
Explanation:
How do waves travel through space?
Explanation:
Electromagnetic waves are waves which can travel through the vacuum of outer space. Electromagnetic waves are created by the vibration of an electric charge. This vibration creates a wave which has both an electric and a magnetic component.
PLEASEEEE I NEED HELPP
Write the reaction for the decomposition of sodium hydrogen carbonate to form sodium carbonate, water and carbon dioxide.
Answer:
Na2O + CO2 >> Na2CO3
Explanation:
Balanced. Single displacement, I think. SYNTHESIS
I think this is Right im not an expert so
Consider the reaction H2O(g)+Cl2O(g)=2HClO(g). At equilibrium,the concentrations of the different species:[H2O]=0.077M,[Cl2O]=0.077M,[HClO]=0.023M. What is the equilibrium constant for the reaction at this temperature?
Choices: 0.089, 0.26, 3.9, or 11
The equilibrium constant K : 0.089
Further explanationGiven
Reaction
H₂O(g)+Cl₂O(g)⇔2HClO(g)
[H2O]=0.077M,[Cl2O]=0.077M,[HClO]=0.023M
Required
the equilibrium constant
Solution
The equilibrium constant or Kc is the value of the concentration product in the equilibrium state of the substance in the right segment divided by the product of the substance in the left section, each of which has a reaction coefficient raised
[tex]\tt K=\dfrac{[HClO]^2}{[H_2O][Cl_2O]}\\\\K=\dfrac{0.023^2}{0.077\times 0.077}\\\\K=0.08922[/tex]
The length of a year is equivalent to the time it takes for one.. (pls help I honestly forgot )
How many Cl- bond with one Na+ ion?
By adding electrons to an uncharged object, the object *
becomes negatively charged
becomes positively charged
becomes energized
changes color
Answer:
becomes negatively charged
Explanation:
this is because when an object receives electrons it becomes negatively charged and the object that loses electrons becomes positively charged.
Answer:
First one because by adding more electrons it makes something more negative. So it becomes negatively charged
If 56 grams of nitrogen is mixed with 56 grams of oxygen, what is the pressure of each gas if the total
pressure is 1320 Torrs?
Answer:
pN₂ = 695 torr; pO₂ = 625 torr
Explanation:
Step 1: Calculate the moles of each gas
The molar mass of N₂ is 28.01 g/mol.
56 g × 1 mol/28.01 g = 2.0 mol
The molar mass of O₂ is 32.00 g/mol.
56 g × 1 mol/32.00 g = 1.8 mol
Step 2: Calculate the total number of moles
n = nO₂ + nN₂ = 1.8 mol + 2.0 mol = 3.8 mol
Step 3: Calculate the partial pressure of each gas
We will use the following expressions.
pN₂ = P × X(N₂)
pN₂ = 1320 torr × (2.0 mol/3.8 mol)
pN₂ = 695 torr
pO₂ = P × X(O₂)
pO₂ = 1320 torr × (1.8 mol/3.8 mol)
pO₂ = 625 torr
6. Which part leads the blood to the heart?
10 points
a. capillaries
b. veins
O c. arteries
d. blood vessels
Answer:
Your answer should be D
The mass of a mole of a substance can be found using the ____ of the substance.
Answer:
mass
Explanation:
Answer:
mass mass mass mass mass
Which compound has both ionic and covalent bonding? *
Ethanol
Glucose
Calcium carbonate
Dichloromethane
Answer:
Calcium carbonate
Explanation:
Ionic compounds that tend to have one or more polyatomic ions are the ones that tend to exhibit both ionic and covalent bonding. The only one that meets this is calcium carbonate.
Do acids lose or gain hydrogen ions?
Help
please
Answer: They lose them :)
Explanation:
An object at rest has equal forces acting on it. This can be described as a(n) ______ force.
Answer:
it would be balanced forces.
Explanation:
Balanced forces acting on an object do not change the objects motion.
In order for photosynthesis to take place, energy in the form of ______ is required.
A. sound
B. light
C. electricity
D. kinetic
Answer:
B. Light
Explanation:
Light is converted into energy during photosynthesis
What type od chemical reaction is the example below?
2 H2O2
2 H2O + O2
a
synthesis
combination
decomposition
single replacement
С
Answer:
Decomposition
Explanation:
One reactant has formed two products
Two reindeer are winding through the winter forest . They spot three owls ,two foxes and four bear . How many legs are there in total?
Answer:
40
Explanation:
8 + 8 + 8 + 16
Which transformations in the rock cycle require heat? Select all that apply.
Igneous rock to metamorphic rock
Metamorphic rock to sedimentary rock
Metamorphic rock to igneous rock
Sedimentary rock to metamorphic rock
Igneous rock to sedimentary rock
Answer:
Igneous rock to metamorphic rock
Metamorphic rock to igneous rock
Sedimentary rock to metamorphic rock
Explanation:
In changing a rock through the listed processes heat is highly required.
Transformation from a rock to igneous rocks requires the most heat because the rock body must be molten.
Igneous rock to metamorphic rock is a metamorphic change that requires significant heat and pressure. The mineralogical fabric is affected by this change. In moving from metamorphic to igneous rock, the melting temperature of a rock must be attained in order for magma to form. Sedimentary changes to metamorphic rocks also require heat.What type of liquid is sucrose solution? (Salt solution, weak acid, etc)
Sucrose solution is an example of sugar solution. Details about a solution can be found below.
What is a solution?A solution is a mixture, which may be liquid, gas or solid, formed by dissolving one or more substances.
A solution is formed when a solute substance dissolved in a solvent.
For example; sucrose is a solute molecule that dissolves in water to form a sucrose solution.
It is important to note that sucrose solution is hypertonic to water i.e. it is a more concentrated solution. There is a net movement of water molecules, by osmosis from the water outside to the sucrose solution.
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Find the product 78.3 times 0.45
Please help :(
Answer:
35.235
Explanation:
I plugged 78.3x0.45 it into a calculator
what are two atoms if hydrogen?
Answer:
ummm molecules i have no idea- i tried tho..
Explanation:
is known as a diatomic element hydrogen is the lightest element has an atomic number of one uses the symbol H at standard temperature and pressure hydrogen is an odorless and colorless gas it is combustible and produces water when it burns in air hydrogen is also the most abundant element in the universe with 90% of atoms in the universe being made of hydrogen main sequence Stars such as the sun burn hydrogen as fuel
help me pleaseee, if you do tyy :)
0.485 moles BaSO4 is equal to how many grams of BaSO4?
___ grams BaSO4
