Based on its location on the periodic table, how many electrons does oxygen have in its
outer energy level? (2 points)
O 3
O4
O 5
O 6

Answer:

Explanation:

To find the pH we must first find the pOH

The pOH can be found by using the formula

pOH = - log [ {OH}^{-} ]

We have

[tex]pOH = - log(8.2 \times {10}^{ - 8} ) \\ = 7.086186...[/tex]

pOH = 7.09

Next we use the equation

pH = 14 - pOH

We have

pH = 14 - 7.09

We have the final answer as

Hope this helps you

Answer:

E, answer 5, A positively charged atom has more protons than electrons.

Explanation:

Answer:

14.2L at STP

Explanation:

Based on the problem, 2 moles of NH3 produce 6 moles of HF. To solve this question we have to convert the mass of NH3 to moles. With the chemical equation find the moles of HF and using PV = nRT find the liters of HF:

Moles NH3 -Molar mass: 17.031g/mol-

3.6g NH3 * (1mol / 17.031g) = 0.211 moles NH3

Moles HF:

0.211 moles NH3 * (6mol HF / 2mol NH3) = 0.634 moles HF

Volume HF

PV = nRT; V = nRT/P

Where V is volume in liters, n are moles of the gas = 0.634 moles, R is gas constant = 0.082atmL/molK, T is absolute temperature = 273.15K at STP and P is pressure = 1atm at STP.

Replacing:

V = 0.634moles*0.082atmL/molK*273.15K / 1atm

V = 14.2L at STP

Answer:

D.

Explanation:

Answer

0°C

Explanation:

substance be formed in it's solid state

Answer:

The pressure is equal to 0.775 atm.

Explanation:

Given that,

The atmospheric pressure on Stevens pass was measure to be 589mmHg.

We need to find the pressure in atm.

We know that,

1 standard atmosphere = 760 mm Hg

1 mm Hg = (1/760) standard atmosphere

589 mm Hg = (1/760)× 589 standard atmosphere

= 0.775 standard atmosphere

Hence, the pressure is equal to 0.775 atm.

Answer:

I believe that it would be faster but the reaction would not happen immediately. It would take a long time for the effect to start kicking in but it will definitely speed up the process of CO2 being released into our atmosphere.

Explanation:

If CO₂ is being produced in the solution at a faster rate than H₂CO₃, then the rate of the forward reaction is faster.

Rate of any reaction tells about the duration of the completion of reaction to produce products.

Given chemical reaction is written as:

H₂CO₃ ⇄ CO₂ + H₂O

In the question it is given that CO₂ is produced at the faster rate, and it is the product of the forward reaction. So, we conclude that rate of forward reaction is faster.

Hence, the rate of forward reaction is faster.

To know more about rate of a reaction, visit the below link:

https://brainly.com/question/7694417

Answer:

64

Explanation:

B

Answer:

C

Explanation:

The nucleus is very dense

Answer:

17.6kg

Explanation:

mass = Volume × Density

mass = 5000cm^3 × 3.52g/cm^3

mass = 17600g = 17.6kg

Answer:

PV= n RT

4.3×y = 5×277

4.3y =1385

4.3y÷ 4.3y = 1385 ÷ 4.3y

y = 322

Answer:

Copper is a good conductor but carbon isn't

Copper has 1 valence electrons but carbon has 4 valence electrons

Explanation:

The  two differences between copper and carbon is that of electronic configuration due to which copper is a metal and carbon is a non-metal.

Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.

Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.

Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.

Learn more about electronic configuration,here:

https://brainly.com/question/29757010

#SPJ6

Answer:

R = 40 ohms

Explanation:

Given that,

The voltage of outlet, V = 120 V

Current flowing through the device, I = 3 A

We need to find the Resistance rating of  the power cord. Let the resistance is R. We know that,

Ohm's law, V = IR

Put all the values,

[tex]R=\dfrac{V}{I}\\\\R=\dfrac{120}{3}\\\\R=40\ \Omega[/tex]

So, the resistance rating of the power cord is equal to 40 ohms.

13 g CO₂

Chemistry

Atomic Structure

Stoichiometry

Math

Pre-Algebra

Order of Operations: BPEMDAS

Step 1: Define

Identify variables

[Given] 6.7 L O₂

[Solve] g O₂

Step 2: Identify Conversions

[STP] 22.4 L = 1 mol

[PT] Molar Mass of O: 16.00 g/mol

[PT] Molar Mass of C: 12.01 g/mol

Molar Mass of CO₂: 12.01 + 2(16.00) = 44.01 g/mol

Step 3: Convert

Step 4: Check

Follow sig fig rules and round. We are given 2 sig figs.

13.1637 g CO₂ ≈ 13 g CO₂

Answer:

1. three-dimensional bonding

Diamond

2. Hardest natural substance

diamond

3. Used as lubricant

Graphite

4. nonconductor

Diamond

5. Weak, planar bonds

Graphite

6.Carbon black or soot

Amorphous

Explanation;

sorry im late, hopefully this can help somebody :)

Answer:

A

Explanation:

If its going at a constant speed it will not accelarate wich means to speed up.

Answer:

reaction to cold pack: change in temperature

Evidence of a chemical reaction etc is change in composition

Explanation: composition is atoms changeing and etc, which is a chemical reacton i think. Change in temperture is alsoa  chemical reaction but cold packs

Answer:

Cold pack: absorbs heat (endothermic reaction)

Hot pack: releases heat ( exothermic reaction)

Explanation:

when a cold pack/hot pack is shaken, water mixes with the chemicals in the outer layer and reacts to release or absorb heat.

Answer:

2.22×10⁻⁹ M

Explanation:

Applying,

[OH⁻][H⁺] = 1×10⁻¹⁴................... Equation 1

Where [OH⁻] = Hydroxyl ion concentration, [H⁺] = Hydrogen ion concentration.

make [OH⁻] the subject of the equation,

[OH⁻] =  1×10⁻¹⁴/[H⁺]............... Equation 2

From the question,

Given: [H⁺] = 4.51×10⁻⁶ M

Substitute into equation 2

[OH⁻] = 1×10⁻¹⁴/4.51×10⁻⁶

[OH⁻] = 2.22×10⁻⁹ M

Answer:

I think is c

Explanation:

I hope this helps you

Answer:

Acid solutions and base solutions

Explanation:

Answer:

B 2:2

Explanation:

Mole ratio is the comparison of the ratio of two compounds or elements in a chemical reaction. In a balanced equation, the moles of a particular compound or element is written as a coefficient. This means that mole ratio is the ratio of the coefficient of two substances in a reaction.

In this balanced chemical equation given as follows:

2CO + 02 → 2CO2

The number of moles/coefficient of carbon monoxide (CO) is 2 while that of carbon dioxide (CO2) is 2.

Hence, the mole ratio of CO to CO2 is 2:2

Answer:

Ca^2+

Explanation:

As we know, more energy is required to remove an electron from a positively charged ion than is required to remove an electron from a neutral atom. Hence, the second ionization energy of calcium is greater than its first ionization energy.

However, the third and fourth ionization energies of calcium are much higher than the second ionization energy because they involve removal of electrons from an inner filed shell. This process requires a lot of energy and is often not feasible.

Hence, the most common ion of calcium must be Ca^2+ where only two electrons are removed from calcium.

Yes, potassium metal can be used to react with an acid to prepare a soluble salt.

Acids react with metals to yield the corresponding metal salt and hydrogen gas.

One of the properties of metals is their ability to react with dilute acids to yield  a soluble salt and hydrogen gas. This is a common reaction for all metals that are above hydrogen in the activity series.

Potassium can react with a hypothetical acid HB as follows;

2K(s) + 2HB(aq) ------> 2KB(aq) + H2(g)

https://brainly.com/question/6136372

Answer:

The intensity of the light bulb increases

Explanation:

The conductivity of a solution depends on the concentration of ions in solution. This implies that, if the concentration of ions in solution is increased, the conductivity of the solution increases accordingly.

If we add more CuSO4(s) to the CuSO4 solution, the concentration of ions in the solution and consequently the conductivity of the solution increases.

Therefore, the intensity of the light bulb increases.

Answer:

both bonding electrons come from the oxygen atom

Explanation:

A coordinate covalent bond is said to be formed when an electron pair is donated into a empty orbital of an atom from a filled orbital of another atom.

In this type of covalent bond, the shared electron pair is furnished by only one of the bonding species.

The bonding between H^+ and H2O to form H3O^+ involves donation of a lone pair of electrons on oxygen into the empty 1s orbital of  H^+ hence the two bonding electrons come from oxygen. This is why the bond is called a coordinate covalent bond.

Answer:

a

Explanation:

does the blome receive high levels of precipitation

Answer:

A.Does the biome receive high levels of precipitation?

Explanation:

Answer:I am not sure how

Explanation: sorry free trial

Answer:Typically, the identity of a substance can be described by a: chemical name, for example, benzene; number, for example, EC number 200-753-7, and.

Explanation:chemical composition, for example, >99 % benzene and <1 % toluene. The composition is determined by chemical analysis.

Answer:

proton

Explanation:

thats what my bio teacher just said

Answer:

It is better to do chemistry

Explanation:

So that you will learn more of chemicals

C,

takes dead things, makes them into other things