URGENT !! PLEASE ANSWER !!
Is H-F a nonpolar or polar covalent bond? why?

Answers

Answer 1

Answer:

It's polar

Explanation:

Hydrogen has an EN of 2.1 and Fluorine an EN of 4.0 (highest EN of any element). So do:  4.0−2.1=1.9.


Related Questions

14. What is the total number of kilojoules of heat needed to change 150. G of
ice to water at 0°C?

Answers

Answer:

[tex]\boxed {\boxed {\sf 50.1 \ kJ}}[/tex]

Explanation:

When water changes from ice (solid) to water (liquid), it is melting or fusion. Therefore, we can use the following formula to find energy:

[tex]q=mH_f[/tex]

where q is the energy, m is the mass, and Hf is the heat of fusion.

1. Define Values

The mass is 150 grams. The heat of fusion for water is 334 Joules per gram.

[tex]m= 150 \ g \\H_f=334 \ J/g[/tex]

2. Calculate Energy

Substitute the values into the formula.

[tex]q=150 \ g * 334 \ J/g[/tex]

Multiply. Note that the grams (g) will cancel each other out and leave Joules as our units.

[tex]q=150 *334 \ J[/tex]

[tex]q=50100 \ J[/tex]

3. Convert Units

We found the answer in joules, but the question asks for kilojoules, so we must convert.

There are 1000 Joules in 1 kilojoule. Therefore, we can divide the joules calculated by 1000.

[tex]50100 \ J *\frac{1 \ kJ}{1000 \ J}[/tex]

[tex]\frac{50100 \ kJ}{1000 \ }[/tex]

[tex]50.1 \ kJ[/tex]

50.1 kilojoules are needed to change 150 grams of ice to water.

In the product 6O2, what does the coefficient mean?

Answers:
There are 12 molecules of O2,
There are 8 molecules of O2,
There are 6 molecules of O2.
There are 2 molecules of O2.

Answers

Answer:

(A) there are 12

Explanation:

bc

7. What is the name of: CH3-CH(CH3)-CH2- alky group? *
isopropyl
propyl
sec-butyl
butyl​

Answers

Answer:

propyl

1-propylmethane or 2-methylpropane

What actions can you take to reduce your impact on science?

Answers

Answer:

Don't travel by air if you can avoid it because air travel uses up large amounts of fossil fuels and creates greenhouse gases. Dispose of any rubbish responsibly - it can be hazardous to wildlife. Use public transport, cycle or walk instead of using a car. Use facilities and trips run by local people whenever possible.

Answer:

Practicing recycling and green computing

Question 8 of 10
What will happen when a reactant is added to a system at equilibrium?
A. The system will remain at equilibrium.
B. Only the concentration of that reactant will change.
C. More reactants will form.
D. The equilibrium of the system will be upset.
SUBMIT

Answers

the equilibrium of the system will be upset

Explanation:

What's the Henry's law formula for gas concentration?

Answers

C=kP, where C is the concentration of dissolved gas and k is henry’s law gas constant and p is the partial pressure of the gas

I JUST NEED HELP!!! ASAP!!1 PLEASE!!!



Which fundamental principle from chemistry states different samples of the same substance contain elements in the same proportions?
Question 15 options:

A)

Law of simple multiple proportions

B)

Plum-pudding model

C)

Law of constant composition

D)

Bohr model

Answers

Answer:

I believe its A) Law of simple multiple proportions

Explanation:

The law of definite proportions states that a given chemical compound always contains the same elements in the exact same proportions by mass.

Answer:

A) Law of simple multiple proportions

Explanation:

Which type of reaction is C1pHO11 12C + 11H,0?
O synthesis
O decomposition
O oxidation
O combustion

Answers

Answer:

C. oxidation ..........

The given reaction is the breaking of the carbohydrate C₁₂H₂₂O₁₁ into 12 C and 11 H₂O. Hence, it is a decomposition reaction .

What is decomposition reaction ?

A decomposition reaction is a type of chemical reaction in which a compound breaks down into two or more simpler substances, either through heat, light, or an electrical current.

In a decomposition reaction, a single reactant is converted into two or more products, which can be elements or compounds.

The general equation for a decomposition reaction can be written as:

AB → A + B

where AB is the reactant and A and B are the products.

Decomposition reactions are important in many chemical processes, such as the breakdown of organic matter in soil, the production of industrial chemicals, and the functioning of biological systems.

The given  reaction is the decomposition of C₁₂H₂₂O₁₁ into 12 C and 11 H₂O.

Find more on decomposition reactions:

https://brainly.com/question/16987748

#SPJ7

Your complete question is follows:

C₁₂H₂₂O₁₁ 11 H₂O + 12 C

Which type of reaction is

O synthesis

O decomposition

O oxidation

O combustion

hypothesize why carbohydrates are found in plant cell walls

Answers

Answer:

Plants can split starch into it's simpler glucose units for use as energy when needed. Cellulose is known as a structural carbohydrate because of the fibers formed by it's molecules. It is the major component of plant cell walls and comprises over half of the carbon found on planets.

Explanation:

I majored in Chemistry

What is the electron configuration of a sulfur atom in the ground state?

Answers

Answer:

1s²2s²p⁶3s²p⁴

Explanation:

An atom that is in the ground state has not lost or gained electrons. If we look at the Periodic Table, we can see that the electron configuration of the sulfur atom (S) is [Ne]3s²p⁴. Since the electron configuration of Ne is 1s²2s²p⁶, the complete electron configuration is 1s²2s²p⁶3s²p⁴.

A reaction involved in the production of iron from iron ore is:
Fe2O3(s)
CO (g)
Fe (s)
CO2
a) How many kilograms of CO must react to produce 3.50 kg of Fe?
b) What mass of CO, would be produced?​

Answers

Answer:

a) 2.632 kg

b) 41.36 kg

Explanation:

Given data:

Mass of CO react = ?

Mass of Fe formed = 3.50 Kg (3.50 /1000 =3500 g)

Mass of CO₂ formed = ?

Solution:

Chemical equation;

Fe₂O₃ + 3CO     →   2Fe + 3CO₂

Number of moles of Fe:

Number of moles = mass/molar mass

Number of moles =  3500 g/55.85 g/mol

Number of moles = 62.67 mol

now we will compare the moles of iron with CO.

            Fe         :       CO

             2          :       3

          62.67     :        3/2×62.67 = 94 mol

Mass of CO:

Mass = number of moles × molar mass

Mass = 94 mol × 28 g/mol

Mass = 2632 g

In kilogram:

2632g × 1 Kg /1000 g

2.632 kg

Now we will compare the moles of Fe with CO₂

                 Fe         :           CO₂

                  2          :           3

               62.67     :        3/2×62.67 = 94 mol

Mass of CO₂:

Mass = number of moles × molar mass

Mass = 94 mol × 44 g/mol

Mass = 4136 g

In kilogram:

4136g × 1 Kg /1000 g

41.36 kg

Which particle has high rate of deposition

Answers

Answer:

a particle with jagged rough ends has a high rate of deposition

Answe

Explanation:

1st Remove ( )

2nd select like terms

3rd Move the constant to the left

4th calculate

5th divided both sides

6th use quadratic formula

What is the resultant pressure if 1.7 mol of ideal gas at 273 K and 2.79 atm in a closed container of constant volume is heated to 315 K? Answer in units of atm.

Answers

Answer: The resultant pressure is 3.22 atm

Explanation:

Gay-Lussac's Law: This law states that pressure is directly proportional to the temperature of the gas at constant volume and number of moles.

[tex]P\propto T[/tex]     (At constant volume and number of moles)

[tex]\frac{P_1}{T_1}=\frac{P_2}{T_2}[/tex]

where,

[tex]P_1[/tex] = initial pressure of gas  = 2.79 atm

[tex]P_2[/tex] = final pressure of gas  = ?

[tex]T_1[/tex] = initial temperature of gas  = 273K

[tex]T_2[/tex] = final temperature of gas = 315 K

[tex]\frac{2.79}{273}=\frac{P_2}{315}[/tex]

[tex]P_2=3.22atm[/tex]

Thus the resultant pressure is 3.22 atm

Help please I’ll give you brain list

Answers

Answer:

A

Explanation:

Please Help Me Balance The equation!! will mark brainliest

Answers

Answer: XCl2(aq) + 2 AgNO3(aq) ---> X(NO3)2(aq) + 2 AgCl(s)

Explanation:

Hehe I remembered how...

What is the mass of 3.02 x 1025 formula units of barium nitrate?

Answers

Answer:

10000 g BaNO₃

General Formulas and Concepts:

Chemistry - Atomic Structure

Reading a Periodic TableUsing Dimensional AnalysisAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

Explanation:

Step 1: Define

3.02 × 10²⁵ formulas units BaNO₃

Step 2: Identify Conversions

Avogadro's Number

Molar Mass of Ba - 137.33 g/mol

Molar Mass of N - 14.01 g/mol

Molar Mass of O - 16.00 g/mol

Molar Mass of BaNO₃ - 137.33 + 14.01 + 3(16.00) = 199.34 g/mol

Step 3: Convert

[tex]3.02 \cdot 10^{25} \ formula \ units \ BaNO_3(\frac{1 \ mol \ BaNO_3}{6.022 \cdot 10^{23} \ formula \ units \ BaNO_3} )(\frac{199.34 \ g \ BaNO_3}{1 \ mol \ BaNO_3} )[/tex] = 9996.79 g BaNO₃

Step 4: Check

We are given 3 sig figs. Follow sig fig rules and round.

9996.79 g BaNO₃ ≈ 10000 g BaNO₃

What is the formula for the compound formed by a magnesium cation (Mg2+) and a fluoride anion (F- )?

Answers

Answer:

MgF₂

Explanation:

Fluorine only has a 1- charge, so to satisfy the 2+ charge on magnesium–– you need 2 fluorine atoms to balance out the charges.

SHOW WORK
The iPhone X is 5.65 inches long. What is the length in cm?

Answers

Answer:

14.351

Explanation:

What does bananas batteries and people have in common

Answers

Simple, humans share 60% of DNA with bananas. That means that you are asking the similarities to humans and batteries which means the answer is that they both have energy or can be used as ‘portable energy.’

Compare the modern model of an atom to the atomic model proposed by John Dalton in 1805

Answers

Answer:

See explanation

Explanation:

Dalton's atomic theory furnished us with a basis to discuss the theory of atoms. However, not all his ideas holds up under the scruitiny of morden science.

He postulated that atoms were 'indivisible' the discovery of subatomic particles indeed show that there are smaller particles than atoms.

His postulation that atoms can neither be created nor destroyed does not hold water today because atoms are being created in nuclear reactors.

He said that atoms of all elements are exactly alike. Today we know there are isotopes of elements which are not exactly alike.

We can see that the Dalton's atomic theory did not take cognisance of the important role of subatomic particles in studying the structure of the atom. Modern atomic theory tries to look at the importance of these particles in the understanding the structure of the atom.

Don't help me
Ima fine.k!!!!!!!!

Answers

Answer:

ok!

Explanation:

okie dokie brother

catalyst
A reaction between NH, and O, is the first step in the
preparation of nitric acid (HNO3) on a commercial scale.
The products are produced at 1000°C (1273 K) and at at-
mospheric pressure.
4 NH; (g) + 5 O2 (g) → 4 NO (g) + 6 H2O (1)
a. What volume of NO is produced in the reaction vessel
by the reaction of 0.500 mol O2?
b. What mass of H2O is produced by the reaction of 15.0 L
of NH3?
c. How many liters of O, must react to produce 35.5 L of
NO?

Answers

a. volume of NO : 41.785 L

b. mass of H2O : 18 g

c. volume of O2 : 9.52 L

Further explanation

Given

Reaction

4 NH₃ (g) + 5 O2 (g) → 4 NO (g) + 6 H2O (l)

Required

a. volume of NO

b. mass of H2O

c. volume of O2

Solution

Assume reactants at STP(0 C, 1 atm)

Products at 1000 C (1273 K)and 1 atm

a. mol ratio NO : O2 from equation : 4 : 5, so mo NO :

[tex]\tt \dfrac{4}{5}\times 0.5=0.4[/tex]

volume NO at 1273 K and 1 atm

[tex]\tt V=\dfrac{nRT}{P}=\dfrac{0.4\times 0.08206\times 1273}{1}=41.785~L[/tex]

b. 15 L NH3 at STP ( 1mol = 22.4 L)

[tex]\tt \dfrac{15}{22.4}=0.67~mol[/tex]

mol ratio NH3 : H2O from equation : 4 : 6, so mol H2O :

[tex]\tt \dfrac{6}{4}\times 0.67=1[/tex]

mass H2O(MW = 18 g/mol) :

[tex]\tt mass=mol\times MW=1\times 18=18~g[/tex]

c. mol NO at 1273 K and 1 atm :

[tex]\tt n=\dfrac{PV}{RT}=\dfrac{1\times 35.5}{0.08206\times 1273}=0.34[/tex]

mol ratio of NO : O2 = 4 : 5, so mol O2 :

[tex]\tt \dfrac{5}{4}\times 0.34=0.425[/tex]

Volume O2 at STP :

[tex]\tt 0.425\times 22.4=9.52~L[/tex]

PLZ HELP! THIS IS DUE IN A FEW MINS!

What would happen to work and power if the mass of the person walking was increased or decreased? EXPLAIN.

Answers

Answer:

work and power increases or decreases opposite of the mass

Explanation:

This Is beacuse Work is the product of Mass, Gravity, and Height

Determine whether each melting point observation corresponds to a pure sample of a single compound or to an impure sample with multiple compounds.

Answers

The question is incomplete, the complete question is;

Determine whether each melting point observation corresponds to a pure sample of a single compound or to an impure sample with multiple compounds.

Experimental melting point is BELOW literature value

Experimental melting point is CLOSE to literature value

WIDE melting point range

NARROW melting point range

Answer:

narrow melting point-pure sample of a single compound

experimental melting point is close to literature value-pure sample of a single compound

wide melting point range-impure sample of multiple compounds

experimental melting point is below literature value-impure sample of multiple compounds

Explanation:

The experimental melting point of a pure single compound is sharp and extremely close to the melting point of the substance as recorded in the literature. Usually, a pure substance melts within a narrow range of temperatures.

Impure samples of multiple compounds melt over a range of temperatures. Also if the experimental melting point is well below the record in literature, then the sample is contaminated by other compounds.

____________________________ the cell organelle where cellular respiration occurs.

Answers

Answer:

Mitochondrion is the cell organelle where cellular respiration occurs.

Hope it helps ^^

Answer:

Mitochondria

I hope this helps!

Guys please help me this is for a final

What happens when you change only the number of electrons inside of an atom

Answers

Answer: Changing the number of electrons will change the overall charge on an atom.

Explanation:

An atom that loses electrons will become positively charged and an atom with added electrons will become negatively charged. ... A charged atom is called an ion.

Water weathers rock and minerals by ___________________ them.


melting

dissolving

burning

ablating

Answers

Answer:

Dissolving?

Explanation:

Answer:

B. Dissovling

Explanation:

Im a smart boy G.

What will most likely happen to the action of an enzyme from the small intestine if it is placed in
an environment similar to the environment in which enzyme C functions best?

Answers

Answer:

It would be able to function because the ph of the environment is similar to that of intestine.

Explanation:

The pH of the small intestine is eight. The enzyme would be able to function because enzyme C functions best at a Ph range around 8.

If u wanted to measure an irregular object volume which of the following device’s could u see

Answers

If the object has an irregular shape , the volume can be measured using a displacement can . The displacement can is filled with water above a narrow spout and allowed to drain until the water is level with the spout. As the irregular object is lowered into the displacement can, the water level rises.

HELP! ASAP!!! WILL MARK BRAINLIEST!!




Which of the following compounds in the main group is an alkali metal? Question 7 options: Beryllium (Be) Rubidium (Rb) Hydrogen (H) Strontium (Sr)

Answers

Answer:

Rb

Alkali Metals are Group 1 so

Rb it isnt Hydrogen because it is a gas

Explanation:

Rubidium is the chemical element with the symbol Rb and atomic number 37. Rubidium is a very soft, silvery-white metal in the alkali metal group. Rubidium metal shares similarities to potassium metal and caesium metal in physical appearance, softness and conductivity. Rubidium cannot be stored under atmospheric oxygen, as a highly exothermic reaction will ensue, sometimes even resulting in the metal catching fire.
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