Charge is important when covalent bonds form

true
False

Answers

Answer 1

Answer: True because they need charge in order to make a covalent bond I just learned that

Related Questions

Which of the following uses the relationship between the DNA of various groups of organisms to determine how long ago they diverged evolutionarily from one another? Carbon datingFossilsTimelinesMolecular clocks
Can someone help plsCalculate the mass in grams of hydrogen chloride produced when 5.6 L of molecular hydrogen measured at STP react with an excess of molecular chlorine gas.
A 25°C sample of gas has a volume of 5.0 L. What will it’s volume be if it is heated to 50.0°C?
Calorimetric studies show that the reaction is exothermic. 2NO2(g) N2O4(g) + 14.1 kcal. Based on this information, which one--if any--of the following additional changes would increase the molar concentration at equilibrium of N2O4(g)?
Write this number showing three significant figures. Remember to round. 10,411

How many chlorine molecules are in 35.5g of chlorine gas

Answers

since chlorine is one of the 7 diatomic elements we know that chlorine appears as Cl₂ gas naturally. That means that the molar mass of a chlorine gas is 70.9g/mol. That being said, first you need to find the number of moles of chlorine gas that are present in a 35.5g sample. To do this divide 35.5g by the molar mass of chlorine gas (70.9g/mol) to get 0.501mol of chlorine. Then you have to multiply 0.501mol by 6.02×10²³ to get the number of chlorine gas molecules. Therefore 3.01×10²³ molecules of chlorine gas are present in a 35.5g sample.

I hope that helps. Let me know in the comments if anything is unclear.

According to the Arrhenius Theory a base reacts with an acid to produce

Answers

Water. Arrhenius acids provide a H+ ion and a base provides a OH- ion, which react to form water.

Corn, Cotton, Tobacco, and Wheat are examples of what?Question 3 options:

Plantations

Economies

Colonies

Cash Crops

Answers

Answer: cash crops

Explanation:

trust

Answer: Cash Crops

Explanation: These crops were used in the south to make loads of money before the civil war in southern plantations so they were known as cash crops

How many times faster will oxygen gas diffuse than carbon dioxide

Answers

Carbon dioxide diffuses 20 times faster than oxygen gas

It is estimated, however, that the diffusing capacity of carbon dioxide is from 400 ml to 450 ml per minute under resting conditions and the diffusion capacity for oxygen under resting conditions is 21 ml per minute.

A radioactive isotope has a half-life of 10 minutes.At the start of an experiment, the activity of a sample of this isotope was 800 counts
per second after allowing for background radiation.
Calculate how long it would be before the activity fell from 800 counts per second to
200 counts per second.

Answers

Answer: The time for activity to fell from 800 counts per second to 200 counts per second is 20 minutes

Explanation:

Expression for rate law for first order kinetics is given by:

$t=(2.303)/(k)\log(a)/(a-x)$

where,

k = rate constant

t = age of sample

a = let initial amount of the reactant

a - x = amount left after decay process

a) for finding the rate constant:

Half life is the amount of time taken by a radioactive material to decay to half of its original value.

$t_{(1)/(2)}=(0.693)/(k)$

$k=(0.693)/(10min)=0.0693min^(-1)$

b) for activity to fell from 800 counts per second to 200 counts per second.

$t=(2.303)/(0.0693)\log(800)/(200)$

$t=20minutes$

The time for activity to fell from 800 counts per second to 200 counts per second is 20 minutes

Final answer:

The half-life of the given radioactive isotope is 10 minutes. The activity of the isotope falls to half its initial value every 10 minutes. Hence, it would take 20 minutes for the activity to fall from 800 counts per second to 200 counts per second.

Explanation:

The process you're describing relates to the concept of radioactive decay, which is a fundamental principle in nuclear physics. In this case, we're dealing with what's known as a half-life. The half-life of a radioactive isotope is the time it takes for half of the isotope in a sample to decay.

In this scenario, the radioactive isotope has a half-life of 10 minutes and it starts with a sample activity of 800 counts per second. According to the nature of half-life, it will reduce to half of its initial counts, 400 counts per seconds in 10 minutes. Importantly, another 10 minutes would be required for the number of counts to halve again to 200 counts per second.

Therefore, it would take 20 minutes for the activity to fall from 800 counts per second to 200 counts per second.

Learn more about Radioactive Decay here:

brainly.com/question/1770619

#SPJ12

Enter the appropriate symbol for an isotope of calcium-42 corresponding to the isotope notation AZX.Express your answer as a chemical symbol using isotope notation.

40
20Ca

Answers

Answer is ₂₀⁴²Ca.

In AZX notation
A - Represents the mass number of atom.
Mass number = number ofprotons + number of neutrons.
It is shown atthe above of the left side of theatom.
Here it is 42.

  Z - Represents the atomic number.
  Atomic number = number of protons.
  It is shown at the bottom line of the left side of the atom.
  Here it is 20.

X - Represents the symbol of the atom.
    Here X is Ca.

The symbol for an isotope of Calcium-42 corresponding to the isotope notation $\rm _A^ZX$ is $\rm _(20)^(42)Ca.$

Isotopes are atoms of the same element that have the same number of protons (atomic number) but different numbers of neutrons (mass number).

In case of Calcium-42,

The chemical symbol for calcium (X) is Ca.

The mass number (A) of the isotope is 42, which is the sum of the number of protons and neutrons in the nucleus of the atom.
The atomic number (Z) of calcium is 20, which is the number of protons in the nucleus of the atom.

Therefore, the chemical symbol for the isotope Calcium-42 is $\rm _(20)^(42)Ca.$

Learn more about isotopes here:

brainly.com/question/27475737

#SPJ6

Other Questions

What is the total amount of heat required to vaporize 1.00 gram of H2O(g) at 100.0C and 1 atmosphere?(1) 4.18 J(2) 334 J(3) 373 J(4) 2260 J

Red blood cells are formed in the bone marrow of the _______

What is the structure of a krypton -85 atom?

What is true about the dilution of a solution?The amount of solute decreases.The volume remains the same.The amount of solvent increases.The concentration increases.