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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)

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Given-

Mass of CH4 - 45.6 grams

Molar mass of CH4 - 16.04 g/mol

volume - 275mL

Temperature- 55°C

Solution,

moles of methane (CH4) n = 45.6/16.04

= 2.84 moles

Using Formula,

Pv = nRT

P*275 = 2.84*8.314*55

P = 1298.64/275

P = 4.72 Atm.

Answer - The pressure inside the container in atm is 4.72.

45.6 grams of CH4 is placed into a 275 mL container at 55.00 C. The pressure is 4.72 atm.

The pressure that one of the gases in a mixture would exert if it were in the same volume on its own.

Given the mass is 45.6 grams

The volume is 275 L

Temperature is 55.00 C.

Calculate the moles

[tex]\rm Number\;of \;moles= \dfrac{mass}{molar\;mass}\\\\\rm Number\;of \;moles= \dfrac{45.6}{16.04} = 2.84 moles[/tex]

Now, calculating the pressure

PV = nRT

[tex]P\times 275 = 2.84\times 8.314\times 55 = 4.72 atm.[/tex]

Thus, the pressure inside the container in is 4.72 atm.

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Answer:

D.

Explanation:

Answer

0°C

Explanation:

substance be formed in it's solid state

Answer:

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

Explanation:

Answer:

1. 0.0500 moles K, 0.0250 moles Cr and 0.1000 moles O.

2. 9.00 moles ammonium ions are present.

Explanation:

1. In 1mol of K2CrO4 there are 2 moles of K, 1 mole of Cr and 4 moles of O.

The moles in 0.0250 moles K2CrO4 are:

0.0250mol * 2 = 0.0500 moles K

0.0250mol * 1 = 0.0250 moles Cr

0.0250mol * 4 = 0.1000 moles O

2. In 1 mole of (NH4)2CO3 there are 2 moles of ammonium ions, NH₄⁺.

In 4,50 moles are:

4.50 moles * 2 = 9.00 moles ammonium ions are present

Answer:

Electrical resistivity is a property of a material that tells you how much it resists the flow of electric current, while conductivity quantifies how easily current flows.

Carbon dioxide is released when limestone is heated during the production of [tex]\sf\purple{cement}[/tex]. ✔

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Answer:

It is better to do chemistry

Explanation:

So that you will learn more of chemicals

Answer:

Plssssssssd can you translate to English???

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:

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.

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:

a

Explanation:

does the blome receive high levels of precipitation

Answer:

A.Does the biome receive high levels of precipitation?

Explanation:

Answer:

17.6kg

Explanation:

mass = Volume × Density

mass = 5000cm^3 × 3.52g/cm^3

mass = 17600g = 17.6kg

Answer:

B. 2.2

Explanation:

Answer:

64

Explanation:

B

Answer:

A base is weak when only a little of it is dissolved in water

Explanation:

Answer: B.) A base is weak when only a little of it is dissolved in water

Hope this helps :)

Answer:

A

Explanation:

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

Answer:

Failure to conserve water during irrigation can lead to an increase in pollution that results from runoff. Natural filters are diminished by the overuse of water resources, which leads to an increase in water contamination that would have been filtered by these natural sources.

Explanation:

Answer:

a. Overirrigating fields causes an increase in pollution that results from runoff.

b. Natural water filters are depleted by the overuse of water.

c. Sewage systems are more likely to fail due to greater demand, causing higher chances of water contamination.

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: water

Explanation: those elements all react to water , so the answer would be water . :)

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:

.025 ml 02

Explanation:

I made a pdf and pasted it in and etc

Answer:

C

Explanation:

The nucleus is very dense

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.

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:

im really sorry but i dont no☹