Answer:
Ca
Explanation:
Ca is larger than Ca2+ because, in the periodic table, the atomic radius increases from top to bottom and from left to right. Also Ca has 2 more electrons than Ca2+ therefore, its atom is bigger because it has an extra shell.
Ca²⁺ is smaller than Ca. As Ca²⁺ has lost two electrons to become positively charged.
Ca²⁺ is the calcium ion, which has lost two electrons to become positively charged. When an atom loses electrons, it becomes smaller because there are fewer negatively charged electrons in the electron cloud to balance the positive charge of the nucleus.
On the other hand, Ca refers to the neutral calcium atom, which has an equal number of protons and electrons. In comparison to Ca²⁺, the neutral calcium atom has two additional electrons, which increases the electron cloud and overall size of the atom.
Therefore, Ca²⁺ is smaller than Ca.
Learn more about calcium here:
https://brainly.com/question/30954368
#SPJ 4
How many moles does 100 g of Calcium hydroxide contain?
Answer:
The molecular formula for Calcium Hydroxide is Ca (OH)2. The SI base unit for amount of substance is the mole. 1 grams Calcium Hydroxide is equal to 0.01349660992152 mole. Note that rounding errors may occur, so always check the results.
Explanation:
sorry if it's wrong
but in your own words
Answer:
gametes are sperm and an egg individually. when the gametes come together and fertilize, they form a zygote.
Please help and I will give brainliest!
I am going to put them in order
R r
R RR rR
r rR rr
Distance and mass are factors that affect the force of
Answer:
Gravity is a fundamental underlying force in the universe. The amount of gravity that something possesses is proportional to its mass and the distance between it and another object.
Explanation:
Hope it helped, brainliest???
PLZ HELP THIS IS DUE IN 2 MINS!!!!!!
8. You hold a 50N bowling ball above your head for 15 minutes. How much work have you done? Why?
9. You run the 100 M race in 15 seconds and your identical twin runs it in 14s. Who did more work? Why?
Answer:
8. 3.333333n per minute
9. you
Explanation:
8. Divide 50 by 15 and you get 3.333333.
9. 100 divided by 15 is 6.66666. 100 divided by 14 is 7.14.
So you did more work.
pls answer this asap
Answer:
1. The enthalpy change for the backward reaction is –20 KJmol¯¹
2. The forward reaction is endothermic.
3. The activation energy for the forward reaction is +70 KJmol¯¹.
Explanation:
Considering the diagram given above, the following data were obtained:
1. The enthalpy change for the forward reaction being is +20 KJmol¯¹ and so, the enthalpy change for the backward reaction is –20 KJmol¯¹
2. The heat energy of the product is higher than that of the reactant. Therefore, the forward reaction is endothermic.
3. Activation energy is the minimum energy needed to be overcome in order for the reaction to proceed to product. It can be obtained from the energy profile diagram by considering the energy between the reactants and the peak.
For the question given above, Activation energy = 20 + 50
Activation energy = +70 KJmol¯¹
For a solar eclipse to occur, a. the sun must be directly between Earth and the moon. b. the moon must be directly between Earth and the sun. c. the moon must be directly behind Earth. d. Earth must be directly between the sun and the moon.
For a solar eclipse to occur, the moon must be directly between Earth and the sun.
What is solar eclipse?A solar eclipse occurs when the moon gets between Earth and the sun, and the moon casts a shadow over Earth.
A solar eclipse takes place only at the phase of new moon, when the moon passes directly between the sun and Earth and its shadows fall upon Earth's surface.
Hence, option B is the correct answer.
To learn more about solar eclipse here
https://brainly.com/question/20986054
#SPJ2
What is molarity a measurerhent of?
A. The grams of a substance dissolved in a liquid
B. The concentration of a substance dissolved in a liquid
C. The number of moles of a dissolved substance
O O
D. The volume of liquid containing a dissolved substance
How to fronts and air masses affect weather?
Answer:
Warm fronts often bring stormy weather as the warm air mass at the surface rises above the cool air mass, making clouds and storms. Warm fronts move more slowly than cold fronts because it is more difficult for the warm air to push the cold, dense air across the Earth's surface.
Explanation:
Good luck!
percent composition for Na2S
Answer:
i gotchu my g
Explanation:
Element Symbol Mass Percent
Sodium Na 58.914%
Sulfur S 41.086%
Water vapor becomes part of the air through the process of evaporation. Describe why and how evaporation occurs.
Explain:
Answer:
evaporation occurs when heat from the sun beams down onto a water source and it turns the water into vapor. If you further explain it, the water vapor will then clump together into clouds. The clouds will then become heavy and release water back to the ground.
Explanation:
the boiling point of isopropyl alcohol is 82.5°C. a student conducts an experiment and finds a boiling point of 83.1°C. what is the students percent error in this experiment?
A.0.6%
B. 0.7%
C. 1.0%
D. 99.3%
Answer:
B. 0.7%
Explanation:
Given data:
Actual boiling point = 82.5°C
Experimental boiling point = 83.1°C
Percent error = ?
Solution:
Formula:
Percent error = ( actual value - experimental value / actual value )×100
by putting values,
Percent error = (82.5°C - 83.1 °C /82.5°C) × 100
Percent error = 0.007 × 100
Percent error = 0.7 %
Negative sign shows that experimental value is greater than accepted value. It can not written in result.
What percent of FeSO4 • 6H20 is Fe?
The percentage of FeSO4 • 6H20 is Fe is 36.04%.
What is FeSO4 ?The iron sulphate or ferrous sulphate is a range of salts with the formula of FeSO4. These are the compounds that exist with the heptahydrate.
The ferrous sulphate is mainly used as a preprocessor for the iron compounds. It is a reducing agent and can be seen in cement to lessen the toxic compounds. It generally consists of 20 to 30% of the elemental, iron per mg of the mineral.
Find out more information about the FeSO4 • 6H20.
brainly.com/question/21003796.
If wind is eroding an area at a rate of 2 mm per year and depositing it in a smaller area at a rate of 7 mm per year, how much lower will the first area be in meters after 2 thousand years? How much higher will the second area be?
Answer:
After 2000 years, the first after will be 4m lower.
After 2000 years, the second area will be 14m higher.
Explanation:
From the given information:
At the first area:
if the wind is eroding at 2 mm/year, then after 2000 years; we have:
2 mm/year × 2000 year = 4000 mm
4000 mm to meters, we have:
[tex]=4000 \ mm \times \dfrac{1 \ m}{ 1000 \ mm}[/tex]
= 4 m lower
At the second smaller area:
Given that the wind is depositing it at the rate of 7 mm per year;
Then:
7 mm/year × 2000 year = 14000 mm
[tex]=14000 \ mm \times \dfrac{1 \ m}{ 1000 \ mm}[/tex]
=14 m higher
Which compound would be classified as a covalent bond
A. KI
B. CaCl2
C. P2O5
D. MgO
Answer:
Explanation:
Examples of compounds that contain only covalent bonds are methane (CH4), carbon monoxide (CO), and iodine monobromide (IBr). Covalent bonding between hydrogen atoms: Since each hydrogen atom has one electron, they are able to fill their outermost shells by sharing a pair of electrons through a covalent bond
The compound that is classified as covalent bond is P₂O₅
The correct answer to the question is Option C. P₂O₅
Covalent bond is a type of bond in which there is a sharing of electron(s) between the atoms involved. Compounds formed by this type of bond are called covalent compounds.
Covalent bond exist between non metals only
With the above information in mind, we can conclude that P₂O₅ is a covalent compound as both phosphorus and oxygen are non metals.
The rest options in the question contains metal and non metals.
The correct answer to the question is Option C. P₂O₅
Learn more: https://brainly.com/question/2205671
Explain cell division in multicellular organisms?
Answer:
the divide through osmosis of mitosis or sum
Explanation:
Answer:
In multicellular organisms, cell division aids in the formation of gametes, which are cells that combine with others to form sexually produced offspring. For growth to occur in living organisms, the number of cells have to increase through cell division until it reaches its maximum size. The human body also repairs injuries by means of cell division.
I hope this answer helps you find your answer! Have a great day! :)
WILL MARK BRAINLIST!!! only for correct answer
NEED CORRECT ANSWER ASAPPP
Answer:
D. 4
Explanation:
Reflection can be defined as a phenomenon which typically involves a change in the direction of a ray of light or waves as it falls on a smooth surface.
Simply stated, reflection occurs when a ray of light or wavefronts bounces off a smooth surface.
Hence, from the diagram provided above, the thin beam of light which illustrates reflection is the fourth because as it hit the surface, it bounced back to the medium from which it was originally propagated with.
What elements make up our blood???
Answer:
erythrocytes, leukocytes, platelets
A 5.00 g sample of a pure substance powder is heated, and the powder leaves 4.63g of a shiny, metallic liquid. Is the powder an element or a compound? Explain
Answer:
compound
Explanation:
We already know that the original substance was pure. If this substance was pure and it was powdery in nature then we have a footing to start from.
Secondly, a 4.93 g of shinny metallic liquid was left behind. This shinny metallic liquid must be an element.
Since there was a loss in mass during heating, it follows that there were other components of the pure powder.
If the reasoning stated above is correct, then the substance is a compound.
2) How many moles of Al atoms are needed to combine with 1.58 mol of O atoms to make
aluminum oxide, Al,0,?
Answer:
t5trr7rtrtt\'uty
gttgvfytg
vgrggyrf
ftyggfkrt
vghg
Explanation:
fyit77fyty
fgyfdftdttdtofttdrftyotyo
ghtytyuuy;
ggytytyyuuyyu
what is the formula for copper (iii) selenide?
Answer:
compound formula is CuSe is answer.
Explanation:
I hope it's helpful!
A carpenter uses a saw to cut a wooden board into two different sized pieces. Which of the following physical properties is most
likely to be the same for both pieces of wood?
1. density
2. mass
3. volume
4. weight
A 0.200 M NaOH solution was used to titrate a 18.25 mL HF
solution. The endpoint was reached after 31.20 mL of titrant
were added. Find the molar concentration of the original HF
solution.
Answer:
The molar concentration of HF is 0.34 M
Explanation:
Given data:
Molarity of NaOH =M₁ = 0.200 M
Volume of HF =V₂= 18.25 mL
Volume of NaOH added = V₁ = 31.20 mL
Molarity of HF solution = M₂ = ?
Solution:
M₁V₁ = M₂V₂
by putting values,
0.200 M × 31.20 mL = M₂ × 18.25 mL
M₂ = 0.200 M × 31.20 mL / 18.25 mL
M₂ = 6.24 M.mL / 18.25 mL
M₂ = 0.34 M
Thus, the molar concentration of HF is 0.34 M.
If Angie knows that baking soda reacts with vinegar producing CO2, what conclusion can she draw from this experiment?
A
CO2 has the capacity to combust in the air around the flame and extinguish it.
B
CO2 can displace oxygen around the flame because it has a lower density than air.
C
CO2 can displace oxygen around the flame because it has a higher density than air.
D
CO2 has the capacity to absorb the heat of the air around the flame and extinguish it.
Answer:
Option C:
CO2 can displace oxygen around the flame because it has a higher density than air.
Explanation:
CO2 is heavier - or in this case, we can say denser than air. In addition to that, CO2 does not support burning. t is a major component in fire extinguishers that are designed to stop minor domestic fire incidents.
Since CO2 is denser than air, it sinks to the bottom of the room, and surrounds the flame with an atmoshphere inert to combustion, pushing the oxygen upwards in the process, away from the reach of the flames.
This causes the fire to starve to death from lack of oxygen
Explain the trend you see in your graph and explain why this occurs at a particle level what is happening when the volume or pressure increases what does the particles do within the sample explain this concept in detail
Answer:
incline
Explanation:
A 100 mL sample of a gas has a pressure of 1.92 atm. What would the volume of the gas be at a pressure of 2 atm, if temperature remains constant?
Answer:
New volume V2 = 96 ml
Explanation:
Given:
Old volume V1 = 100 ml
Old pressure P1 = 1.92 atm
New pressure P2 = 2 atm
Find:
New volume V2
Computation:
Using Boyle's Law
P1V1 = P2V2
(1.92)(100) = (2)(V2)
V2 = 96
New volume V2 = 96 ml
How many strawberries would you need to make 12 smoothies?
Answer: Hey! You need 48 Strawberries to make 12 smoothies.
Explanation: I knew this before but needed to make sure if it's true. So I tested it by myself and got it!
You are very welcome!
You need 84 strawberries to make 12 smoothies.
What is multiplication?Multiplication is a mathematical arithmetic operation. It is also a process of adding the same types of expression for some number of times.
Example - 2 × 3 means 2 is added three times, or 3 is added 2 times.
Given:
Martha needs 28 strawberries to make 4 smoothies.
To make one smoothie,
Martha needs = 28/4 = 7 strawberries.
To make 12 smoothies,
Martha needs = 12 x 7
= 84 strawberries.
Therefore, you need 84 strawberries.
To learn more about the multiplication;
https://brainly.com/question/19634536
#SPJ3
The complete question:
Martha needs 28 strawberries to make 4 smoothies.
How many strawberries would Martha need to make 12 smoothies?
The volume of a gas is 450 mL when its pressure is 1.00 atm. If the temperature of the gas does not change, what is the pressure when its volume is changed to 2.00 L?
Use P Subscript 1 Baseline V Subscript 1 = P Subscript 2 Baseline V Subscript 2.
0.225 atm
0.444 atm
2.25 atm
4.44 atm
Answer:
0.225 atm
Explanation:
v1=450ml÷1000=0.45l(1l=1000ml)
P1=1
v2=2.00l
p2=?
p1v1=p2v2
p2=p1v1/v2
=1×0.45/2
=0.225
so the answer is first one
This question is based on Boyle's law as temperature is constant. Boyle's law is derived from ideal gas equation only at constant temperature. Thus the pressure calculated is 0.225atm.
What is Boyle's law?
Boyle's law is a law which states that at constant temperature, the pressure that is exerted by an ideal gas on the walls of the container is inversely proportional to the volume occupied that gas.
Ideal gas is a gas where there is no forces of attraction or forces of repulsion between the particles . The volume of container is equal to the volume occupied by the gas.
Mathematically,
Initial condition to final condition
[tex]P_{1}V_{1} \rightarrow P_{2}V_{2}[/tex]
[tex]P_{1}[/tex]=1.00atm
[tex]V_{1}[/tex]=450 mL=0.45l
[tex]P_{2}[/tex]=?
[tex]V_{2}[/tex]=2.00L
Substituting all values in given equation
[tex]P_{1}V_{1} \rightarrow P_{2}V_{2}\\P_{2}=P_{1}V_{1}\div V_{2}[/tex]
[tex]P_{2}[/tex]=(1×0.45)÷2.00
[tex]P_{2}[/tex]=0.225atm
Thus the pressure when volume changed to 2.00 is 0.225atm.
To learn more about Boyle's law, here:
https://brainly.com/question/1437490
#SPJ6
Plz help me with is thank you
Answer:
d
Explanation:
the pattern of the chart
What is the best definition of solar radiation?Storing Storing of of energy energy in in Earth'Earth's s oceansoceansEnergy Energy from from the the Sun Sun that that reaches reaches EarthEarthMoisture Moisture and and heat heat energy energy in in the the atmosphereatmosphereIncreased Increased evaporation evaporation due due to to warm warm waterwater
Answer:The solar energy that we receive through solar radiation is directly or indirectly responsible for aspects as important to life as: Photosynthesis in plants; maintaining a planet temperature compatible with life. of the wind. The solar energy that reaches the earth's surface is 10,000 times greater than the energy currently consumed by all
Explanation:
