Answer:
Boron
Explanation:
The group III A is also known in the periodic table as group 13. The members of the group begin to appear in the second period.
At the beginning of this group III A is boron. Boron is a member of group III A as well as a member or period 2.
Boron is a metalloid and has only three valence electrons as other group III A elements.
A spring toy is moving down steps, What happens to the energy of the toy?
Julie is searching for cookware which is safe for all food preparation techniques, which of the following would best fit her needs?
A. Silicone
B. Glass and ceramic
C. Metal
D. Plastic
Which would aid a student in preparedness for a lab?
O using a fire extinguisher if there is a fire
O reading the lab manual before class
O telling the teacher about a chemical spill
O cleaning up after the lab
Answer: cleaning up after the lab, D.
Explanation:
Which synthetic and natural polymers can be used to make thread or rope?
vulcanized rubber and starch
starch and cellulose
nylon and cellulose
vulcanized rubber and nylon
Answer:
D: vulcanized rubber and nylon
Explanation:
on edge! hope this helps!!~ d=(´▽｀)=b
what is k more reactive than li?
Which term is NOT submicroscopic?
A. atom
B. ion
C. pen
D. molecule
What would be the anode
a magnesium and zinc galvanic cell?
Answer:
Magnesium Mg act as anode
Explanation:
Because its reduction potential is much less than zinc
Answer: C. Mg(s)
Explanation:
What is the main difference between physical and chemical changes
versus nuclear changes? *
A.Nuclear changes do not involve the subparticles- protons, neutrons, or electrons.
B.Nuclear changes release less energy than chemical and physical changes.
C.Nuclear changes result in the formation of a different element while physical and
chemical changes involve the same elements from start to finish.
D.There are no differences.
Answer:
B
Explanation:
Because nuear changes release less negeyr than a chmeicsl and phsycial change
animal that hunts and kills other animals for food. It is a consumer ( carnivore or omnivore )?
Answer:
Carnivore
Explanation:
Answer:
Carnivore
Explanation:
You said just animals, not animals and plants
Please Help Me! Check if my answer is correct and if not can you please explain the correct answer
Where does the energy required to break the interactions between butane molecules come from when butane boils?
Answer:
The properties of liquids are intermediate between those of gases and solids, but are more similar to solids. In contrast to intramolecular forces, such as the covalent bonds that hold atoms together in molecules and polyatomic ions, intermolecular forces hold molecules together in a liquid or solid. Intermolecular forces are generally much weaker than covalent bonds. For example, it requires 927 kJ to overcome the intramolecular forces and break both O–H bonds in 1 mol of water, but it takes only about 41 kJ to overcome the intermolecular attractions and convert 1 mol of liquid water to water vapor at 100°C. (Despite this seemingly low value, the intermolecular forces in liquid water are among the strongest such forces known!) Given the large difference in the strengths of intra- and intermolecular forces, changes between the solid, liquid, and gaseous states almost invariably occur for molecular substances without breaking covalent bonds.
Explanation:
im not sure this is what your looking for but i found this
silver bromide (AgBr) has a solubility of 7.07 × 10^-7 mol/L
a. write the dissolution reaction of Abraham, including all states.
b. write the expression for ksp for AgBr
c. calculate the solubility product constant of AgBr
a. AgBr(s)⇒ Ag⁺(aq) + Br⁻(aq)
b. Ksp AgBr = s²
c. 5 x 10⁻¹³ mol/L
Further explanationGiven
solubility AgBr = 7.07 x 10⁻⁷ mol/L
Required
The dissolution reaction
Ksp
The solubility product constant
Solution
a. dissolution reaction of AgBr
AgBr(s)⇒ Ag⁺(aq) + Br⁻(aq)
b. Ksp
Ksp AgBr = [Ag⁺] [Br⁻]
Ksp AgBr = (s) (s)
Ksp AgBr = s²
c. Ksp AgBr = (7.07 x 10⁻⁷)² = 5 x 10⁻¹³ mol/L
How many molecules are in 54.0 grams of CO2?
Answer:
7.38654 in 54 grams
Explanation:
To get moles, you divide grams of a substance by molecular weight. The molecular weight of CO2 is 44 g/mol. 54g divided by 44/mol is 1.227moles.
You then need to multiply moles by Avogadro’s constant (6.022x10^23). That gives you 7.38654x10^23 molecules in 54 grams of CO2.
The number of molecules in 54 grams of CO2 is 7.39 × 10²³ molecules.
• To find the number of molecules, first there is a need to find the number of moles in a substance.
• Moles are determined by using the formula, mass of substances/molecular weight of the substance.
• The molecular weight of CO2 is 44 gram per mole.
• So, the number of moles will be,
Number of moles = 54 g/44 g/mol = 1.227 moles
Now to determine the molecules, there is a need to multiply the moles with the Avogadro's constant, that is, 6.022 × 10²³. This comes out to be as,
= 1.227 moles × 6.022 × 10²³
= 7.39 × 10²³ molecules
Thus, the number of molecules in 54 grams of CO2 is 7.39 × 10²³ molecules.
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helppppppppppppppppp
the third one
seeeeeee
PLS HELP MEEEEEEEEEEEE
Answer:
108- Hassium
11- sodium
56- Barium
92- uranium
25- manganese
103- lawrencium
10- neon
22- titanium
8- oxygen
14- silicon
32- germanium
39- yttrium
The table shows index fossils.
A 4 row table. Row 1, CENOZOIC ERA. It is split into Quaternary Period, Pecten gibbus, and Tertiary Period, Calyptraphorus velatus. Row 2, MESOZOIC ERA. It is divided into Cretaceous Period, Scaphites hippocrepis, Jurassic Period, Perisphinctes tiziani, and Triassic Period, Trophites subbullatus. Row 3, PALEOZOIC ERA. It is divided into Permian Period, Leptodus americanus, Pennsylvanian Period, Dictyoclostus americanus, Mississippian Period, Cactocrinus multibrachiatus, Devonian Period, Mucrospirifer mucronatus, Silurian Period, Cystiphyllum niagarense, Ordovician Period, Bathyurus extans, and Cambrian Period, Paradoxides pinus. Row 4, PRECAMBRIAN, has no additional information.
Which conclusion about Paradoxides pinus is supported by the information in the table?
Life forms existed during the Cambrian period.
Similar fossil species formed after the Devonian period.
This fossil species first appeared during the Cenozoic era.
Different life forms were surviving during Precambrian time.
Answer:
A. life forms existed during the Cambrian period
Explanation:
Answer:
A
Explanation:
Have a nice day!
The color of ink is a ___
Answer:
The ink colors is Magneta, yellow, and black
What two methods return water to the ocean?
(select two)
rivers
transpiration
infiltration
perspiration
Answer:
Water in different phases moves through the atmosphere (transportation). Liquid water flows across land (runoff), into the ground (infiltration and percolation), and through the ground (groundwater). Groundwater moves into plants (plant uptake) and evaporates from plants into the atmosphere (transpiration).
Deuterium is an isotope of hydrogen (H) that has:
A. 1 proton and 1 neutron
B. 1 proton and 2 neutrons
C. 1 proton and O neutrons
D. 2 protons and 1 neutron
Answer: B. 1 proton and 1 neutron(s)
Explanation: Founders Educere answer.
I love you, fellow summer school students good luck!
Please rate and vote and mark brainliest, I want a rank up.
about the lung with balloons what respiratory organ do the small balloons represents? the big balloons?
Answer:
The plastic bottle represents the chest cavity, the straws act as the bronchi, the small balloons inside the plastic bottle serves as the lungs and the big balloon at the bottom of the plastic bottle is the diaphragm.
Explanation:
Help me please if your good at science :)*me over here struggling about to cry*
During which time period does the car have the greatest acceleration?
A. Between 2 and 4 seconds
B. Between 1 and 6 seconds
C. Between 0 and 1 seconds
D. Between 1 and 2 seconds
Answer:
C. Between 0 and 1 seconds
Explanation:
Since 0 - 1 seconds the car accelerates to 20mph. The rest each second the car accelerates 5mph.
Answer:
c
Explanation:
a p e x!
A ___ star has a greater temperature than a ___ star.
A) blue, red
B) red, blue
C) red, yellow
D) yellow, blue
Answer:
red ,blue
Explanation:
because it has a greater temperature
wait i think I messed up nvm
3 difference between Homogeneous mixture and Heterogeneous Mixture
Answer:
Difference between Homogeneous mixture and Heterogeneous Mixture are as follows:
A mixture or sample that is consist of uniform composition and properties is called a homogeneous mixture while a mixture or sample that is consist of different composition and properties is called a heterogeneous mixture.Homogenous mixture has only single phase while heterogeneous mixture has two or more phases.Homogenous mixture can not be separated by physical methods while heterogeneous mixture can be separated out physically.Example of homogenous mixture is Water and sugar and heterogeneous mixture is oil and water.How many liters are in 27.6 g of copper phosphate with a molarity of 6.03 ?
Answer:
Volume in L = 0.028 L
Explanation:
Given data:
Mass of copper phosphate = 27.6 g
Molarity solution = 6.03 M
Volume of solution = ?
Solution:
First of all we will calculate the number of moles of copper phosphate.
Number of moles = mass/molar mass
Number of moles = 27.6 g/ 159.61 g/mol
Number of moles = 0.17 mol
Volume of solution:
Molarity = number of moles / volume in L
By putting values,
6.03 M = 0.17 mol / volume in L
Volume in L = 0.17 mol / 6.03 M
Volume in L = 0.028 L
What is the mass of 6.78x1050 molecules of NaCl
Answer:
Explanation:
As
Molar mass of NaCl= 58.44 gm
So we got it that,
58.44 mass of NaCl contain = 6.023*10^23 molecules of Na Cl
x mass will contain = 6.78*10^50
by cross multiplication , we get
x= 58.44*(6.78*10^50)/ 6.023*10^23
x= 65.785 * 10^27 molecules
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why can't copper sulphate be prepared by adding copper metal to dilute sulphuric acid
Answer:
Copper metal will not react with sulfuric acid . ( Copper metal is too unreactive / it is " below hydrogen in the reactivity series " ). So use copper carbonate, it reacts easily to give copper sulfate ( and carbon dioxide and water ) .
Explanation:
i hope it's help you
Copper sulphate cannot be prepared by adding copper metal to dilute sulphuric acid because copper is below hydrogen in the reactivity series of metals.
What is copper sulphate?Copper sulphate is an inorganic compound formed by the reaction of copper and sulphur.
What is sulphuric acid?Sulphuric acid is a strong acid that are made by the oxidizing solutions of sulphur dioxide.
Copper is below hydrogen in the reactivity series of metals, so it is unable to displace hydrogen from dil. sulphuric acid.
However, it reacts with conc. sulphuric acid to form copper sulphate.
Cu + conc. 2H2SO4 → CuSO4 + 2H2O + SO2
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Hannah is investigating how all of Earths systems can affect each other at any given moment. What is one way the cryosphere can affect the atmosphere?
Answer:
itch come get meeeeee
Explanation:
itch come get meeeeee
DUE IN 10 MINS PLEASE HELP ME ASAP!!!!!!!!!!!!!!! !•Directions: Select each correct answer. More than one answer may be correct.
DWhich of the following objects exerts a gravitational force?
A.the Sun
B.an apple
C.the Moon
D.a basketball
E.the Earth
Reset
Submit
Answer:
all of them
Explanation:
every object in the universe that has mass exerts a gravitational pull, or force, on every other mass.
Answer:
All of them
Explanation:
Study Island
b. How many grams of CO2 are produced from 36
grams of CH4?
Answer:
Ch4 G +2o2 g co2 G +2h2o g How many moles of methane are required to produce 22 g co2 G after combustion
Explanation:
it's 22 grams..
hope the answer was helpful ....
Which electron configuration is magnetic, paired or unpaired electrons
Answer:
paired electrons is magnetic configuration