Which of these statements is true? A.
Some molecules may contain no atoms.

B.
Some elements found in nature exist as molecules.

C.
Some compounds include only one type of element.

D.
Some atoms are made of two or more different elements. Which of these statements is true?

A.
Some molecules may contain no atoms.

B.
Some elements found in nature exist as molecules.

C.
Some compounds include only one type of element.

D.
Some atoms are made of two or more different elements.

Answers

Answer 1

Answer: Pretty sure it's B. If not, then it's C.

Related Questions

Why are fibers birefringentbecause of the chemical makeup of the fiber because the fiber is a natural fiber because the fiber has long range order because the fiber has a refractive index greater than 1.52 because the refractive index is less than 1.52
Solutions of mercury (I) nitrate and potassium bromide are mixed
What is the volume of 2.1 moles of chlorine gas (Cl2) at standard temperature and pressure (STP)?
If an ice cube melts at 0oC but water also freezes at 0oC, what is the difference between melting and freezing in terms of (a) the energy involved in the phase changes and (b) particles of the substances during the phase changes?
Which base is the strongest for the given [H+]? 10-9 10-11 10-10 10-12

Carbon has four valence electrons, and chlorine has seven valence electrons. If carbon covalently bonds with chorine, which of the following would represent the Lewis dot (electron dot) structure?

Answers

Answer: The correct answer is Image 3.

Explanation:

Lewis dot structure is defined as the structure which represents the number of valence electrons around the atom. The electrons are represented as dots.

From the structure, we can easily determine the number of bonding and non-bonding electrons. Non-bonding electrons are considered as lone pair of electrons.

Carbon is the 6th element of the periodic table having electronic configuration of $1s^22s^22p^2$

This element has 4 valence electrons.

Chlorine is the 17th element of the periodic table having electronic configuration of $1s^22s^22p^63s^23p^5$

This element has 7 valence electrons.

The lewis dot structure for the compound $CCl_4$ is given below in the image attached.

Hence, the correct answer is Image 3.

1. It is wrong because each chlorine atom should have 3 lone pairs
2. It is wrong because carbon only has four valence electrons
3. It is correct because each chlorine has 3 lone pairs and carbon has 4 electrons covalently bonded with chlorine
4. It is wrong because chlorine only has 7 valence electrons and therefore it cannot have 3 lone pairs and 2 bond pairs for each of C-Cl bonds

Which process uses a volume of solution of known concentration to determine the concentration of another solution?(1) distillation (3) transmutation(2) substitution (4) titration

Answers

Answer: Titration

Explanation: Titration is defined as the process where a solution of known concentration is used to determine the concentration of an unknown solution.

Volumetric titrations are usually used for neutralization reactions where an indicator is used to know the acidic or basic nature of solution.

The normality equation used at a point where neutralization occurs during the titration is:

$N_1V_1=N_2V_2$

$N_1$ = Normality of acid solution

$V_1$ = volume of acid solution

$N_2$ = Normality of basic solution

$V_2$ = Volume of basic solution

Titration. The known is added to the unknown until it reaches an equilibrium.

What is the ph at the equivalence point when 0.10 m hno3 is used to titrate a volume of solution containing 0.30 g of koh?

Answers

Answer;

pH = 7

Explanation;

HNO3 is a strong acid. KOH is a strong base. At the equivalence point, the solution will be neutral.
Therefore; the pH at the equivalence point when 0.10 m HNO3 is used to titrate a volume of solution containing 0.30 g of KOH will be 7.
The neutralization of a strong base with a strong acid gives a salt solution at the equivalence point. The salt contains ions that do not change the pH of water.

Answer:

pH at equivalence point will be 7

Explanation:

$HNO_(3)$ is a strong acid and KOH is a strong base. Hence a neutral salt would appear from acid-base reaction between them.
Acid-base reaction: $HNO_(3)+KOH\rightarrow KNO_(3)+H_(2)O$
At equivalence point, $KNO_(3)$ and water exists in medium.
As $KNO_(3)$ is a neutral salt therefore pH of medium will be equal to 7 (neutral).
So, pH at equivalence point will be 7.

10. If a car travels from Town A to Town B on one road at different speeds and stops at red lights, knowing the distance between the towns and the total time of the trip can allow you to calculate A. instantaneous velocity.B. deceleration.C. average velocity.D. uniform velocity.

Answers

Answer: The correct option is C.

Explanation: Average velocity is defined as the displacement divided by the total time taken by the object.

Mathematically,

$\text{Average Velocity}=\frac{Displacement}{\text{Total time}}$

We are given, the distance between the two towns and also the total time, so we can easily calculate the average velocity.

Hence. the correct option is C.

Answer : Option C) Average Velocity

Explanation :

As we have the given information about the different speed and the distances between the town and the total trip time, then it will allow anyone to calculate the average velocity of the car.

The average velocity is defined as the displacement divided by the time taken. This will help to determine the average velocity the car was moving with while traveling to various distances.

Which of the following types of radiation has the greatest ability to penetrate matter

Answers

You did not specify the types, but I believe the answer would be gamma radiation.

Final answer:

Among alpha,beta, neutron, and gamma radiations, gamma radiation has the greatest ability to penetrate matter. It can pass through dense and thick materials, including a few feet of concrete and even lead.

Explanation:

When comparing the ability of different types of radiation to penetrate matter, from least penetrating to most penetrating, the sequence is alpha < beta < neutron < gamma. This means the gamma radiation is the most penetrating type of radiation. Alpha radiation has the least penetration ability and can be blocked by even a thin sheet of paper. Beta radiation has slightly higher penetration power, able to go through about 3mm of aluminum, for instance. Gamma radiation, on the other hand, can penetrate much denser and thicker materials. For example, high-energy gamma radiation can pass through a few feet of concrete, and even lead to a depth of 2 or more centimeters.

Learn more about Radiation Penetration here:

brainly.com/question/31480864

#SPJ11

NaOH + HCl → NaCl + H2O. What mass of water forms when 2.75 × 10–4 mol NaOH reacts completely? given the equation, 2.75 × 10–4 mol NaOH = ___ g H2O

Answers

The balanced chemical reaction is written as:

NaOH + HCl → NaCl + H2O

We are given the amount of sodium hydroxide to be used up in the reaction. This will be the starting point for the calculation.

2.75 x 10^-4 mol NaOH ( 1 mol H2O / 1 mol NaOH ) ( 18.02 g H2O / 1 mol H2O ) = 4.96 x 10^-3 g H2O

Answer:

0.00496

Explanation:

on edg i just did the assignment teehee

Other Questions

Which chemical equation describes an acid-base neutralization reaction?

How does a sedimentary rock turn into a metamorphic rock?

The following reaction does not proceed to a product: H2O + Ag --> no reaction. Why is that?A) The reaction proceeds too slowly too create products.B) The reaction cannot occur because water is reactant.C) Silver has a higher activity than hydrogen and cannot replace it.D) Silver has a lower activity than hydrogen and cannot replace it.

Which of the following is the best example of heat being. Transferred by conduction