Explanation:
Then there is no net charge separation. a BH3 b CHCl3 c C2H2 d NH3. Optionally the ... Oxygen O2 c. ... BH3 2. Com Bh3 Polar Or Nonpolar In the case of non polar molecules dispersion forces or London forces are present between them.
The polar molecules is NO.
What is polar molecule?A polar molecule is one that has one end that is slightly positive and the other end that is slightly negative. Ionic or polar covalent bonds can form in polar molecule. A dipole is a molecule that has two poles. The dipole moment is the outcome of measuring the amount of polarity in a molecule.
NO molecule, In the periodic table, nitrogen is to the right of oxygen. Nitrogen has a lower electronegative potential than oxygen. All N-O bonds are polar, with the oxygen atom having a higher electron density. The uneven distribution of electrons in the NO molecule is quite minor. When a molecule is non-polar, the electrons are shared evenly, resulting in a non-polar bond, or the polar bonds are symmetric. So, oxygen, nitrogen and boron trihydride molecules are non-polar molecule.
Hence the correct option is D.
To know more about polar molecule, here,
https://brainly.com/question/11405437
#SPJ2
a cube measures 1.0cm on each side. what is the volume of the cube? if this cube i dropped into 28.0ml of water, what will be the new volume reading on the gratulated cylinder?
We are studying Mole and Molar Mass of Elements and Compounds and i need help please thank you!!!
Explaining the concept:
Molar mass of an element is the mass of 6.022*10²³ atoms of that element
a group of 6.022*10²³ atoms or molecules is called 1 mole of that specific element or compound
this number is so large that even though atoms are very small, 6.022*10²³ of them weigh several grams depending on the element the atom belongs to.
Atoms with a larger atomic number have more protons and neutrons than atoms with small atomic number; more protons and neutrons means that they have more matter and hence, more mass
that's why elements with a large atomic number are heavier
for example:
the molar mass (mass of 1 mole or 6.022*10²³ atoms) of hydrogen is approximately '1' grams per mole
whereas,
the molar mass of Carbon (C), (which has only 5 electrons more than hydrogen) is 12 grams per mole
Solving the question:
Finding the number of Moles:
We are given 5.4 grams of Boron (B)
the molar mass of boron is 11 grams per mole
To calculate the number of moles of an element, we divide the given mass by the molar mass
Number of moles = Given mass / Molar mass
Number of moles = 5.4 / 11
Number of moles = 0.5 (approx)
Finding the number of Atoms:
Now that we have the number of moles, we can easily find the number of atoms by dividing it by 6.022*10²³ (since a group of 6.022*10²³ atoms is 1 mole)
Number of Atoms = Number of moles * 6.022*10²³
Number of atoms = 0.5 * 6.022*10²³
Number of atoms = 3.011 * 10²³
why boiling points are much More extreme that melting points?
Answer:
Every substance has its own melting point and boiling point . The stronger the forces between particles, the higher its melting and boiling points. For example, the forces between ions in an ionic solid are stronger than those between molecules in water or hydrogen.
Explanation:
Answer:
They are extremely hotter and the molten lava is being boiled by the earth.
Explanation:
By: Dreamy Illumination
I want to know how I do excess reactant and limiting reactant. Image provided below.
Answer:
Limiting Reactant is going to be NaOH or HCl with given lowest moles. Excess will be the ones with more.
Explanation:
Excess and Limiting reactants are based on the amount you could make in an ideal reaction. M (molarity) is the concentration of the given solutions where moles in the amount (the important part) you have of each. If you only have 0.0100 mol NaOH while you have 0.0400 mol HCl the most a reaction has the potential to use is that 0.0100 mol NaOH, thus making it the limiting reactant as it is limiting the possible amount made. The excess here is 0.0300 mol HCl.
Jill has decided that she wants to start conserving gasoline Jill is considered about the rising price of gas as well as by products from gas engines pollute the atmosphere what solution would help Jill solve this problem
A). deciding to drive her Carla until the price goes down
B). Deciding to ride her bicycle from work Instead of driving
C). Deciding to use premium unleaded instead of regular unleaded gasoline
D) Deciding to move to a city where smog from automobiles is not a problem
Answer:B
Explanation:
It is
According to law of conservation of energy and usage of renewable resources Jill should decide to ride her bicycle from work instead of driving.
What is law of conservation of energy?According to the law of conservation of energy, it is evident that energy is neither created nor destroyed rather it is restored at the end of a chemical reaction .
Law of conservation of mass and energy are related as mass and energy are directly proportional which is indicated by the equation E=mc².Concept of conservation of mass is widely used in field of chemistry, fluid dynamics.
Law needs to be modified in accordance with laws of quantum mechanics under the principle of mass and energy equivalence.This law was proposed by Julius Robert Mayer in the year 1842.
Learn more about law of conservation of energy,here:
https://brainly.com/question/29775341
#SPJ2
An atom of tin becomes an cation when it forms an ionic bond with four atoms of chlorine. What is the charge
on the tin ion?
4-
4+
2-
2+
Explanation:
as it is cation so 4+
it loses four electron
1. Where is the Cascade Range found? 2. What does the Cascade Range include?
3. What formed the Cascade mountains?
4. What is a plate boundary?
5. List the three ways plates interact.
6. What is subduction?
7. What is the Ring of Fire?
8. What do colliding plates form?
1. Cascade Range, segment of the Pacific mountain system of western North America. The Cascades extend northward for more than 700 miles (1,100 km) from Lassen Peak, in northern California, U.S., through Oregon and Washington to the Fraser River in southern British Columbia, Canada.
2.The Cascade Range or Cascades is a major mountain range of western North America, extending from southern British Columbia through Washington and Oregon to Northern California. It includes both non-volcanic mountains, such as the North Cascades, and the notable volcanoes known as the High Cascades.
3.The Cascade Volcanoes were formed by the subduction of the Juan de Fuca, Explorer and the Gorda Plate (remnants of the much larger Farallon Plate) under the North American Plate along the Cascadia subduction zone.
4.What are Plate Boundaries? Plate boundaries are the edges where two plates meet. Most geologic activities, including volcanoes, earthquakes, and mountain building, take place at plate boundaries.
5.Contents
1 Divergent boundaries.
2 Convergent boundaries (subduction zone)
3 Orogenic belts.
4 Transform boundaries.
____________________
6.Subduction is a geological process that takes place at convergent boundaries of tectonic plates where one plate moves under another and is forced to sink due to high gravitational potential energy into the mantle. ... Subduction zones are sites that usually have a high rate of volcanism and earthquakes.
7.The Ring of Fire is a major area in the basin of the Pacific Ocean where many earthquakes and volcanic eruptions occur.
8.The impact of the colliding plates can cause the edges of one or both plates to buckle up into a mountain ranges or one of the plates may bend down into a deep seafloor trench. A chain of volcanoes often forms parallel to convergent plate boundaries and powerful earthquakes are common along these boundaries.
What is the molecular formula of each of the following compounds? Part A Empirical formula CHO2, molar mass = 180.0 g/mol
Answer:
C4H4O8
Explanation:
The molecular formula of a compound with empirical formula: CHO2 can be calculated as follows:
(CHO2)n = 180g/mol
{12 + 1 + 16(2)}n = 180
(12+1+32)n = 180
(45)n = 180
n = 180/45
n = 4.
The molecular formula = (CHO2)4
= C4H4O8
I need help with the second one
Sorry, your photo isn't clear enough.
A man is walking in the park at night when he sees a shadow suddenly dart across his path. Which glands will be responsible for controlling his “fight or flight” reaction? Check all that apply.
adrenal
thymus
pancreas
hypothalamus
Answer:
Adrenal and Hypothalamus!
Explanation:
Hope this helps!
Answer:
A man is walking in the park at night when he sees a shadow suddenly dart across his path. Which glands will be responsible for controlling his “fight or flight” reaction? Check all that apply.
Adrenal and Hypothalamus
A woman goes to the doctor for blood tests because she has not been feeling well. Tests show that the sugar levels in her blood are too high. In which gland does she most likely have a problem?
Pancreas
Explanation:
2) Calculate the volume of a liquid with a mass of 143 grams and a density of 2.3 g/cm”.
Answer:
62.174
Explanation:
volume = mass/density
143/2.3 = 62.174
How are homogeneous and
heterogeneous mixtures alike and
different?
Answer: A homogeneous mixture has the same uniform appearance and composition throughout. Many homogeneous mixtures are commonly referred to as solutions. A heterogeneous mixture consists of visibly different substances or phases. ... Solutions have particles which are the size of atoms or molecules - too small to be seen.
How does rust form?
a. Through paint flaking off of a metal surface
b. Through a chemical reaction between iron and oxygen c. Through weathering
d. Through the physical mixing of iron and wa
Answer:
B. Through a chemical reaction between iron and oxygen
Thunderstorms and hurricanes are examples of severe weather. Which of these weather conditions is necessary for the formation of thunderstorms and hurricanes? O Cold rain falling to the ground. O Air masses combining to create a high-pressure area. O Winds spiraling dowrward and away from the center of a storm. O Air moving toward the center of a storm and rising into the atmosphere.
Answer:
O Winds spiraling dowrward and away from the center of a storm.
Explanation:
this is correct
a cylinder has a mass of 14.98g and a volume of 2.10 ml. what is the cylinder's density?
Answer:
7.133 g/cm^3
Explanation:
Density = mass ÷ volume
Given,
mass = 14.98 g
Volume = 2.10 ml = 2.10cm^3 [because 1 ml= 1cm^3]
density = 14.98÷ 2.10
density = 7.133 g/cm^3
Answer:
[tex]\boxed {\tt d\approx7.13 \ g/mL}[/tex]
Explanation:
The density of an object can be found by dividing the mass by the volume.
[tex]d=\frac{m}{v}[/tex]
The mass of the cylinder is 14.98 grams.
The volume of the cylinder is 2.10 milliliters.
[tex]m=14.98 \ g\\v= 2.10 \ mL[/tex]
Substitute the values into the formula.
[tex]d=\frac{14.98 \ g}{2.10 \ mL}[/tex]
Divide.
[tex]d=7.13333333 \ g/mL[/tex]
Round to the nearest hundredth. The 3 in the thousandth place tells us to leave the 3 in the hundredth place.
[tex]d\approx 7.13 \ g/mL[/tex]
The density of the cylinder is about 7.13 grams per milliliter.
Which of the following is NOT a property of all metals?
a. conduct electricity b. shiny
c. does not conduct heat d. malleable when solid
Answer: Shiny
Explanation:
Group 17 elements form A. +1 ion B. -1 ion C. +7 ion D. -7 ion
Answer:
B
Explanation:
Use your periodic table to find out the charge on a Fl ion if your periodic table is constructed that way. In any event, the charge on Fl when it becomes an ion is -1. I don't think it has any other charge. So all of the elements in column 17 will have at least -1 in common.
HELP ASAP PLEASE :)))
All of the following are examples of physical properties EXCEPT?
A. melting point
B. hardness
C.ability to burn
D. density
Answer:
Ability to burn
Explanation:
If you burn something, lemme tell ya, it ain't coming back.
The physical properties are properties where chemical composition is not altered thus, the correct option is C that is ability to burn as burning changes chemical composition.
Any property which describes the state of a physical system is called as a physical property.Changes in physical properties are used to describe changes between the states. They are often related to as observable properties.
Physical property which can be quantified is a physical quantity. These are also classified further with respect to their directionality. Isotropic properties do not change with direction of observation while anisotropic properties change with direction of observation.
Physical properties are differentiated from chemical properties by the way they determine how a substance behaves in a chemical reaction.
In burning the chemical composition is changed thus it is not a physical property.Thus, correct option is C.
Learn more about physical properties,here:
https://brainly.com/question/18327661
#SPJ6
What is the heat of a reaction, in kJ/mol, with a total reaction mixture mass of 62.6 g if the reaction of 0.15 mol of reactant A causes a temperature increase of 4.6 oC in a calorimeter
Answer:
[tex]-8.032\ \text{kJ/mol}[/tex]
Explanation:
m = Mass of mixture = 62.6 g
n = Number of mole of reactant = 0.15 mol
[tex]\Delta T[/tex] = Change in temperature = [tex]4.6^{\circ}\text{C}[/tex]
c = Specific heat of mixture = [tex]4.184\ \text{J/g}^{\circ}\text{C}[/tex] (assumed to be the same as water)
Heat generated
[tex]Q=mc\Delta T\\\Rightarrow Q=62.6\times 4.184\times 4.6\\\Rightarrow Q=1204.82\ \text{J}=1.20482\ \text{kJ}[/tex]
Heat of reaction is given by
[tex]\Delta H=-\dfrac{Q}{n}\\\Rightarrow \Delta H=-\dfrac{1.20482}{0.15}\\\Rightarrow \Delta H=-8.032\ \text{kJ/mol}[/tex]
The heat of the reaction is [tex]-8.032\ \text{kJ/mol}[/tex]
A 62.6 g-reaction mixture that contains 0.15 moles of reactant A and causes a temperature increase of 4.6 °C in a calorimeter, has a heat of reaction of -8.0 kJ/mol.
We have a reaction mixture in a calorimeter that causes a temperature increase of 4.6 °C (ΔT). We can calculate the heat absorbed by the solution (Qs) using the following expression.
[tex]Qs = c \times m \times \Delta T = \frac{4.184J}{g.\° C} \times 62.6 g \times 4.6 \° C \times \frac{1kJ}{1000J} = 1.2 kJ[/tex]
where,
c: specific heat capacity of the solution (we will assume it is the same as water)m: mass of the solutionAccording to the law of conservation of energy, the sum of the heat absorbed by the solution and the heat released by the reaction (Qr) is zero.
[tex]Qs + Qr = 0\\\\Qr = -Qs = -1.2 kJ[/tex]
1.2 kJ are released by the reaction of 0.15 moles of reactant A. The heat of the reaction, in kJ/mol, is:
[tex]\frac{-1.2kJ}{0.15mol} = -8.0 kJ/mol[/tex]
A 62.6 g-reaction mixture that contains 0.15 moles of reactant A and causes a temperature increase of 4.6 °C in a calorimeter, has a heat of reaction of -8.0 kJ/mol.
Learn more: https://brainly.com/question/20250226
Write chemical equations and corresponding equilibrium expressions for each of the two ionization steps of carbonic acid.
Answer:
H₂CO₃(aq) ⇄ H⁺(aq) + HCO₃⁻(aq) K₁ = [H⁺][HCO₃⁻]/[H₂CO₃]
HCO₃⁻(aq) ⇄ H⁺(aq) + CO₃²⁻(aq) K₂ = [H⁺][CO₃²⁻]/[HCO₃⁻]
Explanation:
Let's consider the equation for the first step of the ionization of carbonic acid.
H₂CO₃(aq) ⇄ H⁺(aq) + HCO₃⁻(aq)
The first ionization constant is:
K₁ = [H⁺][HCO₃⁻]/[H₂CO₃]
Let's consider the equation for the second step of the ionization of carbonic acid.
HCO₃⁻(aq) ⇄ H⁺(aq) + CO₃²⁻(aq)
The second ionization constant is:
K₂ = [H⁺][CO₃²⁻]/[HCO₃⁻]
The initial concentration of A in the first order reaction A→3B+2C is 0.535 mol L−1. Given that the rate constant is 0.450 s−1, what is the half-life of the reaction, in seconds? Remember to use correct significant figures in your answer (round your answer to the nearest hundredth).
Answer:
Half life = 1.540 s
Explanation:
A → 3B+2C
Initial concentration = 0.535 mol L−1
rate constant k = 0.450 s-1
half life t1/2 = ?
Since the reaction s a first order reaction
Half life is given by;
t1/2 = 0.693 / k
t1/2 = 0.693 / 0.450 = 1.540 s
The temperatures on the inside and outside surface of a wall are 20°C and 5°C respectively. The wall is 8 m wide, 4 m high, and 0.2 m thick.
The thermal conductivity is 0.3 W/m.K.
1
The heat flux through the wall is negative
W/m2. Use two significant figures in your answer.
Answer:
Heat Flux = - 22.5 W/m²
Explanation:
We can use Fourier's Law of Heat Conduction:
q = -kAΔT/t
q/A = -KΔT/t
where,
q/A = Heat Flux = ?
K = Thermal Conductivity = 0.3 W/m.K
ΔT = Change in Temperature = 20°C - 5°C = 15K
t = Thickness = 0.2 m
Therefore,
Heat Flux = -(0.3 W/m.k)(15 k)/(0.2 m)
Heat Flux = - 22.5 W/m²
Negative sign shows the heat flowing out of the system.
If an atom has a neutral charge, it must have *
A. More Neutrons than protons
B. More protons than neutrons
C. Same number of electrons and protons
D. Same number of electrons and neutrons
Answer:
C
Explanation:
20 POINTSSSS!!!!!!!!!!!
WHAT IS THE COLORS NOT THE GASES THE COLORS OF AN PLASMA BALL?
blue, red, and white colors.
Explanation:
→Blue→Red →WhiteYour AnswerWrite the formula for each compound that contains a polyatomic ion. potassium bicarbonate: aluminum phosphate: copper(II) hydroxide:
Explanation:
A polyatomic ion refers to an ion that contains more than one atom.
Potassium Bicarbonate contains the Potassium ion and bicarbonate ion.
The formula is given as; KHCO₃
Aluminium Phosphate contains the Aluminium ion and Phosphate ion.
The formula is given as; AlPO4
Copper(II)hydroxide contains copper ion and hydroxide ion.
The formula is given as; Cu(OH)₂
helpp pls anything helpsss
Answer:go in the order from top to bottom.
Ammonium chloride= NH2Cl
chlorideIron(III) nitrate=Fe(NO3)3
Titanium(III) bromide=TiBr3
Copper(I) phosphide=Cu3P
Tin(IV) Selenide=SnSe2
Gallium arsenide=GaAs
Lead(II) sulfate=Pb(SO4)3
Beryllium Hydrogen Carbonate=Be(HCO3)2
Manganese(III) Sulfite=Mn2(SO3)3
Aluminium cyanide Al(CN)3.
Which energy transition may take place in the atom if it’s electron has absorbed a photon?
Answer:
higher-energy orbit
Which element is classified as a noble gas?
Oz Ō
Xe
Answer:
Group 8A (or VIIIA) of the periodic table are the noble gases or inert gases: helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn). The name comes from the fact that these elements are virtually unreactive towards other elements or compounds.
Explanation:
its XE
The atoms of which element will gain electrons to form an ion?
A. mercury
B. bromine
C. beryllium
D. potassium
what is the litosphere made of
Answer:
brittle crust and top is made of upper mantel