The highest ionization energy of alkaline earth metal is calcium. Therefore, option (A) is correct.
What is the ionization energy?The ionization energy can be described as the minimum energy that an electron has to absorb to come out of the effect of the nucleus of a gaseous atom or ion.
It tells about the reactivity of chemical compounds and determines the strength of chemical bonds. The units of ionization energy are electronvolts or kJ/mol.
Ionization energy measures the difficulty in removing an electron from an atom or ion and the loss of electron occurs in the ground state of the chemical species.
According to the general configuration of alkaline earth metals, they contain two electrons in their valence shell. The atomic size of alkaline earth metals increases as we move down the group. The electronegativity and effective nuclear charge of alkaline earth metals decrease.
The electron can easily be lost from the atom as we move down the group. Therefore, calcium present at the top of the group has the highest ionization energy.
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a primary substance that cannot be divided into separate substances; one of about 112 different basic varieties of matter making up the universe
Answer:
No you can not divide a primary substance into a seperat one because ot wpuld be like divideing the universe
PLEASE HELPPPP...If you have a mass of 70 kg and you are standing on a platform 8 m above the ground, what is your gravitational potential energy?
Answer: 5491.72
Explanation:
parasitic protists passed by mosquitoes causes this disease
Answer:
Malaria
Explanation:
Mosquitos mainly carry Malaria since the dawn of men.
Answer:
malaria
Explanation:
"Malaria" is a mosquito-borne illness that is caused by a parasitic protist called "Plasmodium protozoa." These parasites are carried by mosquitoes. Once a mosquito bites a human, it creates an opening for the parasites to enter. The parasites then become harmful once they enter the human body. They infect the human's Red Blood Cells (RBCs), which causes several symptoms such as fever, fatigue, headache, cough, nausea, etc.
How much heat is released when 24.8 g of ch4 is burned in excess oxygen gas?
The given question is incomplete. The complete question is:
How much heat is produced when 24.8 g of [tex]CH_4[/tex] is burned in excess oxygen gas
Given: [tex]CH _4 +2O_2\rightarrow CO_2+2H_2O[/tex] ΔH= −802 kJ.
Answer: 1243.1 kJ
Explanation:
Heat of combustion is the amount of heat released on complete combustion of 1 mole of substance.
Given :
Amount of heat released on combustion of 1 mole of methane = 802 kJ kJ/mol
According to avogadro's law, 1 mole of every substance occupies 22.4 L at NTP, weighs equal to the molecular mass and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.
1 mole of [tex]CH_4[/tex] weighs = 16 g
Thus we can say:
16 g of [tex]CH_4[/tex] on combustion releases heat = 802 kJ
Thus 24.8 g of [tex]CH_4[/tex] on combustion releases =[tex]\frac{802}{16}\times 24.8=1243.1kJ[/tex]
Thus heat released when 24.8 g of methane is burned in excess oxygen gas is 1243.1 kJ
is Fe2(CO3)3 soluble?
A fixed mass of oxygen gas occupies 300cm cube at 0 degree centigrade. what volume would the gas occupy at 15 degree centigrade
Answer:
Volume occupied by oxygen gas at 15 degree centigrade is equal to [tex]316.5[/tex] centimeter cube
Explanation:
Assuming Pressure is constant.
[tex]\frac{V_1}{T_1} = \frac{V_2}{T_2}[/tex]
where T1 and T2 are temperature in Kelvin
Substituting the give values we get-
[tex]\frac{300}{273} = \frac{V_2}{288}[/tex]
[tex]V_2 = \frac{288*300}{273} \\V_2 = 316.5[/tex]
Volume occupied by oxygen gas at 15 degree centigrade is equal to [tex]316.5[/tex] centimeter cube
pls help 6th grade science
Answer:
C.)
Explanation:
I also saw this question on Brainly! Hope this helps!
How many grams of Ag are produced if I start the reaction with 5.5 mol Cu?
Equation given:
Cu + 2AgNO3 -> 2Ag + Cu(NO3)2
Answer:
9.34 g Ag
Explanation:
What happens in a
neutralisation reaction.
Answer:
A neutralization reaction is when an acid and a base react to form water and a salt and involves the combination of H+ ions and OH- ions to generate water. Salts are also formed in this reaction.
Explanation:
Guys help please!! any five effects of heat!!
[tex] {\huge {\underline {\underline {\bold {\blue{Effects \: of \: Heat}}}}}}[/tex]
Expansion of particles of substances. Increase in temperature.Change in state.Change in physical propertyIt may bring out chemical changes.__________________________________
[tex] \tt\underline\orange{hope \: it \: helps}[/tex]
The state of matter with the highest kinetic
energy is
A. solid
B. liquid
C. gas
Plz help answer this question
Answer:
A compound
B mixture
And C Element
Explanation:
this is actually science and I will give brainliest but u have to show your work
Answer:
I think it's 3.01 meters per second
To find the speed, you divide distance by time. So, you do 100 divided by 33.2, which equals 3.01 I think. I hope this helped.
Barium chloride solution was used to test for sulfate ions in the presence of dilute hydrochloric acid. What color precipitate would
form if sulfate ions were present?
Answer:
white
Explanation:
A white precipitate of barium sulfate forms if sulfate ions are present. The hydrochloric acid is added first to remove any carbonate ions that might be present - they would also produce a white precipitate, giving a false positive result. Barium nitrate solution can be used instead of barium chloride solution
11. Acids are described as being because they dissolve some metals.
Answer:
Corosive
Explanation:
CORRECT
Answer:
Corosive
Explanation:
Hope this will help
Which function is not associated with cartilage?
Answer:
Cartilage does not contain blood vessels (it is avascular) or nerves (it is aneural). Some fibrocartilage such as the meniscus of the knee does however have blood supply in part. Nutrition is supplied to the chondrocytes by diffusion.
I will give brainliest and so many points
The symbol equation for combustion of a hydrocarbon is shown below. What number will go before the oxygen reactant when
this equation is balanced?
Answer:
Yes it is indeed
Explanation:
Thanks if you found this helpful
The balanced chemical equation is [tex]\rm C_3H_8 + 5O_2- \rightarrow 3CO_2 + 4H_2O[/tex].
What is chemical equation?Chemical equation is defined as a formulation of mathematics that captures the chemical reaction. We can learn about the reactants and products involved in a chemical reaction by developing a chemical equation. It includes the symbols for the atoms of each element found in the compound, together with a count of how many of each element there are overall in the form of subscripts.
Chemical equations must be balanced in order to satisfy the law of conservation of mass, which states that "the total mass of all products of reaction in a chemical reaction is equal to the total mass of all reactants." A chemical equation is said to be balanced when the number of various elemental atoms on the reactants and products sides are equal. Chemical equations must be balanced by a process of trial and error.
Thus, the balanced chemical equation is [tex]\rm C_3H_8 + 5O_2- \rightarrow 3CO_2 + 4H_2O[/tex].
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1. What are commonly called as "shooting stars"?
A. asteroids
B. comets
C. meteors
D. meteorites
2. What are found in the circular or somewhat like "doughnut-shaped"
region between Mars and Jupiter?
A. asteroids
B. comets
C. meteors
D. meteorites
3. Which Near-Earth Objects (NEO) are found on the Kuiper Belt and Oort
Cloud?
A. asteroids
B. comets
C. meteors
D. meteorites
4. What are comets made of?
A. dust only
B. metal only
C. dust and metal
D. dust, metal, and ice
5. What do you call the shining "head" around a comet?
A. coma
B. crown
C. halo
D. ring
Answer:
I hope I can help you
I hope I can help you
Identify the reaction
In pic
the taste of acid is sour
yes the taste of acid is sour
Explanation:
the acid increase the hydrogen concentration, which provides more ions for the tongue. Because the tongue gains ions, it registers the flavor as sour.
What are calories used for?
hurry pls!
Answer:
Calories are used for physical activity.
Explanation:
Calories provide energy for consumers. You may notice when you drink or eat, you gain more energy. This is because calories are stored in our drinks and foods.
Answer:
They are
Explanation:
They are used to make people obese. The government uses calories to make people weak and unhealthy. For example, McDonalds is known to have many calories in their food. I hate the government.
What do you use to determine molar mass?
Answer:
the molar mass of any element can be determined by finding the atomic mass of the element on the periodic table for example, if the atomic mass of sulfer is 32.066 amu, then it's molar mass is 32.066 g / mol
49. Identify the noble gas that has atoms in the ground state with the same electron configuration as the nitrogen in a molecule of isocyanic acid
Answer:
Neon (Ne)
Explanation:
Nitrogen in it's neutral state has valency of 5 and it's electronic configuration is given as;
1s2 2s2 2p3
However in isocyanic acid, it forms a covalent bond with hydrogen and carbon. Due to this bond, it is able to achieve stable octet configuration. The configuration is given as;
1s2 2s2 2p6
This is the same electronic configuration as Neon
what is the correlation between the number of mole of ions in the solution and the freezing point
Answer:
13.9
Explanation:
4. A separating funnel can be used to separate a mixture of two________ liquids. *
a) miscible
b) homogenous
c) immiscible
d) distilled
Answer:
d) distilled
Explanation:
A separatory funnel, also known as a separation funnel, separating funnel, or colloquially sep Funnel and fractionating Funnel. , is a piece of laboratory glassware used in liquid-liquid extractions to separate (partition) the components of a mixture into two immiscible solvent phases of different densities.
Answer:
d) distilled
Explanation:
Correct!!!
25.0(g) of pentane(C5H12) is combined with excess oxygen
Answer:Hlo
Explanation:How are you?
Chemical Reaction Type of reaction
2NaCl 2Na + Cl2 _________________________
CaCl2 + F2 CaF2 + Cl2 _________________________
AgNO3 + KCl AgCl + KNO3 _________________________
N2 + H2 2NH3 _________________________
C3H8 + 5O2 3CO2 +4 H2O _________________________
Answer:
Explanation:
2NaCl 2Na + Cl2 synthesis reaction
CaCl2 + F2 CaF2 + Cl2 oxidation-reduction
AgNO3 + KCl AgCl + KNO3 precipitation reaction
N2 + H2 2NH3 i dont know
C3H8 + 5O2 3CO2 +4 H2O Balanced Chemical Reactions and the Conservation of Mass
true or false
sugar melting an example of oxidation
and
water evaporating
Answer:
false i think
Explanation:
2. A sample of oxygen gas is placed in a rigid 1.5L glass container at STP. If the gas is
heated to 100 degrees (Celcius) what is the new pressure in mmHg?
The new pressure : P₂ = 1038.39 mmHg
Further explanationGiven
1.5 L container at STP
Heated to 100 °C
Required
The new pressure
Solution
Conditions at T 0 ° C and P 1 atm are stated by STP (Standard Temperature and Pressure).
So P₁ = 1 atm = 760 mmHg
T₁ = 273 K
T₂ = 100 °C+273 = 373 K
Gay Lussac's Law
When the volume is not changed, the gas pressure is proportional to its absolute temperature
[tex]\tt \dfrac{P_1}{T_1}=\dfrac{P_2}{T_2}[/tex]
Input the value :
P₂=(P₁.T₂)/T₁
P₂=(760 x 373)/273
P₂ = 1038.39 mmHg