Answers
Answer:
7. 5km/h
8. 10km/h
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Related Questions
Bromine gas reacts with beryllium fluoride →
Answers
Answer:
Br₂ + BeF₂ → BeBr₂ + F₂
Bromine gas reacts with beryllium fluoride to produce beryllium bromide and fluorine gas.
Explanation:
This is a single replacement reaction in which bromine replaces fluorine.
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How long would it take you to travel 8 miles at a speed of 1 mile per hour?
Answers
Answer:
It would take you 8 hours.
Explanation:
This would take you 8 hours because you are going 1 mile an hour. So in 1 hour, you would have gone 1 mile.
temperature is a measure of the ______ of an object. 1. kelvin 2. insulator 3. average KE 4. radiation 5. specific heat
Answers
Answer:
5
Explanation:
Temperature calculates heat/the temperature in the specific location.
Which atom has the largest atomic radius? *
K
Fr
Cs
Rb
Answers
We have seasons because
Answers
Answer:
Earth's axis is tilted at an angle of about 23.4 degrees and different parts of Earth receive more solar energy than others. Earth's orbit around the Sun is elliptical. Because of Earth's axial tilt (obliquity), our planet orbits the Sun on a slant which means different areas of Earth point toward or away from the Sun at different times of the year.
Explanation:
Rank the three types of bonds - ionic, polar covalent and nonpolar covalent - from
strongest to weakest. Justify your answer.
Answers
Ionic has the strongest bond because there is a complete transfer of the valence electrons, this results in full charges. Polar covalent bonds have electrons shared unequally between the atoms, resulting in partial charges in the atoms. And nonpoplar covalent bonds have electrons shared equally between two atoms, resulting in i charges of the atoms.
The order of strongest to weakest bond type:
Ionic bond > Polar covalent bond > non polar covalent bond
Explanation:
Ionic bonds are chemicals bonds in which the complete transfer of electrons takes place between a highly electronegative atom and the least electronegative atom.In an ionic bond, there is a strong electrostatic force of attraction due to the formation of two oppositely charged ions.Covalent bonds are chemicals bonds in which the sharing of electrons takes place between atoms with a slight or nil difference in their electronegativities.There are two types of covalent bonds: polar covalent and nonpolar covalent.In polar covalent bonds, due to unequal sharing of electrons partial positive and negative charges are generated.These partial charges give rise to a temporary attractive force of attraction between atoms in polar covalent bonds.In non-polar covalent bonds, equal sharing of electrons between atoms of the same or similar electronegativities.The order from strongest to weakest chemical bond:Strong electrostatic force> temporary attractive force> no force of attraction
Ionic bond > Polar covalent bond > non polar covalent bond
So, from this, we can conclude that the order of ionic bond is the strongest followed by a polar covalent bond and then a nonpolar covalent bond.
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if you have 3g of sodium and 4g of chlorine what is the total mass of sodium chloride
Answers
Answer:
7g
Explanation:
Given parameters:
Mass of sodium = 3g
Mass of chlorine = 4g
Unknown:
Total mass of sodium chloride = ?
Solution:
This problem entails the direct application of the law of conservation of mass. According to this law, it states that "matter is neither created nor destroyed in the course of a chemical reaction".
So, when sodium and chlorine combines to form sodium chloride, to are expect to produce substance with a mass which adds up to the sum of the reactants;
Mass of sodium chloride = mass of sodium + mass of chlorine
= 3g + 4g
= 7g
The sun provides heat
Answers
A plant grows at the same rate as wheat plant 2. If the plant is 4.2 cm tall, calculate how old the plant is. Use the corrected trendline for wheat plant 2.
Answers
Answer:
The correct response is "3.127 weeks". A further explanation is given below.
Explanation:
As we know,
y = 1.3431x
Use, y = 4.2 cm
Now,
⇒ [tex]y = 1.3431x[/tex]
On substituting the values of y, we get
⇒ [tex]4.2=1.3431x[/tex]
⇒ [tex]x = \frac{4.2}{1.3431}[/tex]
⇒ [tex]=3.127 \ weeks[/tex]
How would you name the number:100 liters?
A. Dekaliter
B. Hectoliter
C. Centiliter
D. Megaliter
E. Other
Answers
Answer:
E
Explanation:
.
A hot plate, a large beaker of water, and grains of rice are used in a class demonstration. When the water begins to boil, the rice moves in a circular pattern. The model demonstrates
Answers
Answer:
Conduction
Explanation:
Plz help
I don't know chem that well
Answers
9) A certain atom has 10 electrons, 14 neutrons, and 11 protons. Write the name of this element in isotope notation.
Answers
Answer:
²⁵₁₁Na⁺
Explanation:
Details about the atom:
Number of electrons = 10 electrons
Number of neutrons = 14 neutrons
Number of protons = 11 protons
The atomic number of an atom is a good indicator of the type of atom we have been given.
From the subatomic particles, the number of protons is the same as the atomic number.
Since the number of protons is 11, its atomic number will be 11.
The element with atomic number 11 is sodium, Na.
To write a complete notation, we also need the mass number;
Mass number = number of protons + number of neutrons
Mass number = 11 + 14 = 25
The charge on the atom:
Charge = Number of protons - number of electrons = 11 - 10 = 1+
The element in isotopic notation is given as;
²⁵₁₁Na⁺
Why is the movement of water between land, oceans and living things
important?
Answers
How many electrons can be present in an atom having three principal
energy levels? *
Answers
Answer:
18 electrons
Explanation:
The third principal energy level has one s orbital, three p orbitals, and five d orbitals, which can each hold up to 10 electrons. This allows for a maximum of 18 electrons. The fourth and higher levels have an f sublevel in addition to the s, p, and d orbitals.
Answer:
18 electrons
Explanation:
The five d orbitals can hold up to 10 electrons. Thus, the third level holds a maximum of 18 electrons: 2 in the s orbital, 6 in the three p orbitals, and 10 in the five d orbitals.
The two major types of bonds are ___________________ and _____________________. Electrons are either ________________ or _______________ to fill the last shells of atoms that ions. The ____________________ number of an ion is either positive or negative. When we combine ions we can only combine _____________________ with ____________________ ions. When atoms share electrons they form ____________________ bonds. The electrons involved with bonding, in the last shell that are shared are called____________________ electrons. Three examples of macromolecules are _______________________, ________________________ and ___________________. The four main atoms involved in carbon chemistry are ____________________________.
Answers
Answer:
chemical bonds and covalent bonds
Explanation: covalent bonds are in which the valence electrons density is shared between two atoms and chemical bonds are the connections between atoms in a molecule . electrons can be either free [not attached to any atom] or bound to nucleus of an atom. atom or molecule is a number of an ion which is either positive or negative. when we combine ion we can only combine elements with ionic bonds. when atoms join together , they form chemical bonds without transferring any electrons but they rather share them. copper sulphide are the last shell that are shared with bonding . proteins, carbohydrates, lipids are the example of macromolecules . nucleic acids, lipids, proteins, carbohydrates are the main atoms involved in carbon chemistry.
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Give oxidation and reduction half-reactions to the equation provided
Answers
Explanation:
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What causes potential energy to convert to kinetic energy?
Answers
Answer:
The system's potential energy is increased by gaining altitude. Then, gravity takes over, causing most of the potential energy to be converted into kinetic energy
Explanation:
What is the molarity of a sodium carbonate solution containing 32.52 g Na2CO3 dissolved in enough water to make 822 ml of solution?
NEED ASAP PLEASE!!
Answers
The molarity of a Sodium carbonate solution : 0.373 M
Further explanationGiven
32.52 g Na₂CO₃
822 ml of solution = 0.822 L
Required
The molarity
Solution
Molarity shows the number of moles of solute in every 1 liter of solution.
[tex]\large{\boxed {\bold {M ~ = ~ \frac {n} {V}}}[/tex]
mol of solute = mol of Na₂CO₃ :
= mass : MW Na₂CO₃
= 32.52 g : 106 g/mol
= 0.307
Molarity :
= n : V
= 0.307 mol : 0.822 L
= 0.373 M
What are columns on the periodic table called? What is the significance of the columns on the periodic table?
Answers
Answer:
The vertical columns of the periodic table are called groups, or families. The significance is elements with similar properties are placed in the same vertical columns. The horizontal rows of the periodic table are called periods. The significance is that properties vary from left to right along the rows.
Explanation:
We just did this in science
Answer:
columns in the periodic table are reffered to as "periods". periods represent elements with the same number of shells i.e all elements in period 1 have 1 shell (k shell) and vice versa.
Guys please I need an answer for this asap
Mg+2HCl -> MgCl+H2
0.2 mole of mg reacted with 0.2 of HCl
What is the mass of hydrogen gas produced?
Answers
but you’d put .2 over the coefficients, and if there is not one, you put an X. then you will cross multiply, and divide if you have 2x or something greater than X.
Which one of the following substances will have hydrogen bonding as one of its intermolecular forces?
a
о
Нc— c— СТ.
Oь
o=
H— С—Н
нан
H— C— N
н н
н
0
1
— С—С
1
н н
Answers
Answer:
Explanation:
hc-- c--ct
The correct answer is option A: CH3COCH3
Hydrogen bonding occurs when hydrogen is directly bonded to a highly electronegative atom.
Hydrogen bonding is one of the intermolecular interactions. It occurs only when hydrogen is bonded to a very electronegative atom in a molecule. Hydrogen bonding can occur between two molecules of the same type(intermolecular hydrogen bonding) or within the same molecule (intra molecular hydrogen bonding). In either case, the bonding is polar as hydrogen is attached to the electronegative atom via a non-covalent bonding interaction.
Looking at the structures in the question attached, CH3COCH3 does not have any hydrogen atom directly attached to a highly electronegative atom hence CH3COCH3 does not exhibit hydrogen bonding.
Hydrogen bonding in water is shown in the image attached.
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How do chemists use systems and order in their work?
Answers
Answer:
5 point) Chemists used systems and order because they study the basic unit of all forms of matter, which is the atom . However, there are several different kinds of atoms, called elements . Chemists organize these elements using the periodic table .
Explanation:
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When you lie down on a mattress the force of ______ pulls your mass towards the floor, while the force of the mattress pushes back up resulting in _______ forces, which allow you to sleep comfortably.
Answers
Answer:
1 gravity 2 counteractive
Explanation:
How many atoms are in 1.5 moles of iron?
Answers
Answer:
One mole of anything is 6.022×1023 everythings, including atoms. Multiply the moles Fe by 6.022×1023 atoms/mol. 3.77mol Fe ×6.022×1023atoms Fe1mol Fe =2.27×1024 atoms Fe rounded to three significant figures.
The number of atoms present is 1.5 moles of iron is 9.0 ×10²³ atoms
From the question,
We are to determine the number of atoms present in 1.5 moles of iron.
From the formula,
[tex]Number\ of\ moles = \frac{Number\ of\ atoms}{Avogadro's\ constant}[/tex]
Then, we can write that
Number of atoms = Number of moles × Avogadro's constant
∴ Number of atoms of iron present = 1.5 × 6.022×10²³
Number of atoms of iron present = 9.033 ×10²³ atoms
Number of atoms of iron present ≅ 9.0 ×10²³ atoms
Hence, the number of atoms present is 1.5 moles of iron is 9.0 ×10²³ atoms
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Convert 12.0 g of FeO into moles.
1 mole
71.85 moles
5.99 moles
O.17 moles
Answers
Answer:
71.85 moles
5.99 moles
O.17 moles
Explanation:
vzl
Answer:
4th option: 0.17 moles
Explanation:
The number of moles of a substance can be calculated using the following formula: Mole= Mass ÷Mr
The Mr of a compound is its molecular weight, which is the sum of the relative atomic masses of the atoms it is made up of.
Find the Mr using the periodic table:
Mr of FeO
= 55.8 +16
= 71.8
Calculate number of moles:
Amount of FeO
= 12 ÷71.8
= 0.17 moles (2 d.p.)
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After a lightning storm, the Rodriguez family notices the TV no longer works.
What probably caused this malfunction?
A. Power from the TV was pulled into the ground by the lightning.
B. A power surge burned an electric component of the TV.
C. The lightning sucked power from the TV.
D. The surge protector sucked power from the TV.
Answers
Answer:
B
Explanation:
A P E X
After a lightning storm, the Rodriguez family notices the TV is no longer working because a power surge burned an electric component of the TV. The correct option is B.
What is lightning?Lightning is a natural phenomenon that occurs when there is a collision of negative and positive charged particles. It appears as light or spark of electricity into the earth. It shines and affects the eyes if directly seen.
Lightning occurs when there is thunder or rain, lightning causes destruction to the earth, the houses, trees, and people are also impacted by this. The TV was not working because there was a short circuit due to lightning.
Thus, the correct option is B. A power surge burned an electric component of the TV during a lightning storm.
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Why methanol is not an alkane
Answers
Answer: it’s not in the first group in the periodic table
Explanation:
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help me with science for brainiest:)
Answers
Answer:
The answer is C. Plasma