Ask question

Ask question

All categories

3 years ago

11

You should _____ when you are giving an oral presentation. A. hide your purpose B. use a humorous tone C. avoid drawing clear co

nclusions D. make eye contact with the audience

2 answers:

zhannawk [14.2K]3 years ago

8 0

D. make eye contact with the audience

MatroZZZ [7]3 years ago

3 0

D. Make eye contact with the audience

You might be interested in

A 1. 07 g sample of a noble gas occupies a volume of 363 ml at 35°c and 678 mmhg. Identify the noble gas in this sample. (r = 0.

Margaret [11]

The identity of the noble gas is the sample is Krypton

<h3>Ideal Gas law</h3>

From the question, we are to determine the identity of the noble gas in the sample

From the ideal gas equation, we have that

PV = nRT

∴ n = PV / RT

Where P is the pressure

V is the volume

n is the number of moles

R is the gas constant

and T is the temperature

From the given information,

P = 678 mmHg = 0.892105 atm

V = 363 mL = 0.363 L

R = 0.08206 L.atm/mol.K

T = 35 °C = 35 + 273.15 K = 308.15 K

Putting the parameters into the equation, we get

n = (0.892105 × 0.363)/ (0.08206 × 308.15)

n = 0.0128 moles

Now, we will determine the Atomic mass of the sample

Using the formula,

Atomic = Mass / Number of moles

Atomic mass of the substance = 1.07 / 0.0128

Atomic mass of the substance = 83.6 amu

The noble gas with the closest atomic mass to this value is Krypton.

Molar mass of Krypton = 83.798 amu

Hence, the identity of the noble gas is the sample is Krypton

Learn more on Ideal Gas law here: brainly.com/question/20212888

#SPJ12

4 0

2 years ago

Which best describes an oxidizing agent?

stellarik [79]

Answer:B) a reactant that undergoes reduction

Explanation:

Oxidation reaction is defined as the reaction in which a substance looses electrons. The oxidation state of the substance increases during oxidation.

$M\rightarrow M^++e^-$

Reduction reaction is defined as the reaction in which a substance gains electrons. The oxidation state of the substance gets reduced during reduction.

$N^++e^-\rightarrow N$

Overall reaction: $M+N^+\rightarrow M^++N$

The substance M which itself gets oxidized, reduces other and is called as reducing agent. The substance N which itself gets reduced, oxidizes other and is called as oxidizing agent.

6 0

3 years ago

Read 2 more answers

Which of the following pairs of elements belong to the same period?

bagirrra123 [75]

Answer:

He and Ar

Explanation:

3 0

3 years ago

A chef makes a marinade by mixing red pepper flakes, dried onion flakes, and a ground ginger with soy sauce. He sets the marinad

Alisiya [41]

Answer:

Suspension

Explanation:

This mixture is a simple suspension.

A suspension is a mixture of small insoluble particles of a solid in a liquid or gas. Here, it is insoluble particles in liquid.

Suspensions are settle on standing this is why they have to be mixed again.
The particles do not pass through ordinary filter paper.
They are usually cloudy and have an opaque color.
The marinade is simply a suspension.
It is not a solution because they do not settle on standing.
Also, colloids do not settle on standing.

3 0

3 years ago

Read 2 more answers

An unknown substance turns blue litmus paper to red. Which additional test could be used to confirm the substance’s identity? It

Vedmedyk [2.9K]

Blue litmus paper turning red means that the solution where the litmus paper was submerged is an acidic solution with a pH of less than 7. Another verification of the nature of the solution is the turning to red of methyl orange in acidic solutions. The answer then is D.

5 0

3 years ago

Read 2 more answers