subject

Chemistry, 04.10.2020 18:01 wolfsaway

19. What is the approximate mass of one mole of helium (He) gas? A. 2 g
B. 4 g
C. 8 g
D. 22 g

ansver

Answers: 2

Show answers

Another question on Chemistry

question

Chemistry, 22.06.2019 10:30

Aglow stick contains a glass vial with chemicals. when the glow stick is bent, the vial breaks and the chemicals react to produce a glow. a science student observes that a glow stick kept in the freezer glows for a longer duration than a glow stick kept at room temperature. what conclusion can be drawn based on the observation? be sure to note the outcome and test variables in the conclusion.

Answers: 1

question

Chemistry, 22.06.2019 14:30

Which of the following describes a situation where competition between producers exists

Answers: 1

question

Chemistry, 22.06.2019 17:10

)benzene and toluene form nearly ideal solutions. consider an equimolar solution of benzene and toluene. at 20 °c the vapour pressures of pure benzene and toluene are 9.9 kpa and 2.9 kpa, respectively. the solution is boiled by reducing the external pressure below the vapour pressure. calculate (i) the pressure when boiling begins, (ii) the composition of each component in the vapour, and (iii) the vapour pressure when only a few drops of liquid remain. assume that the rate of vaporization is low enough for the temperature to remain constant at 20 °c.

Answers: 1

question

Chemistry, 22.06.2019 23:00

What is the mass of naoh that would have to be added to 500 ml of a solution of 0.20 m acetic acid in order to achieve a ph of 5.0?

Answers: 1

You know the right answer?

19. What is the approximate mass of one mole of helium (He) gas? A. 2 g
B. 4 g
C. 8 g

Questions

question

Mathematics, 27.06.2019 03:40

Apebble drops from a balcony that is 160 feet above the ground. the pebble lands on the top of a sign that is 16 feet high. the function y=160? 16t2 r...

question

Business, 27.06.2019 03:40

Required information cirque du soleil: searching for new blue ocean this activity is important because, as a manager, you must be able to identify yo...

question

Mathematics, 27.06.2019 03:40

You want to determine how quickly messages can spread onto a social media website. on the first day, you create a message that is shared with 2 people...

question

English, 27.06.2019 03:40

Write two to four sentences comparing the excerpts from queen elizabeth's speeches. be sure to consider each speech’s purpose and use of rhetorical ap...

question

Business, 27.06.2019 03:40

The comparative balance sheets for 2018 and 2017 and the statement of income for 2018 are given below for dux company. additional information from dux...

question

Mathematics, 27.06.2019 03:40

An airplane pilot over the pacific sights an atoll at an angle of depression of 10 degrees. at this time, the horizontal distance from the airplane to...

question

Computers and Technology, 27.06.2019 03:40

Where are commonly accessed commands located by default in excel 2016? status bar view tab search field quick access tool bar...

question

Mathematics, 27.06.2019 03:40

Give a correct interpretation of a 99% confidence level of 0.328 < μ < 0.486. a. 99% of sample means fall between 0.328 and 0.486. b. there is...

question

Biology, 27.06.2019 03:40

1. abscisic acid chemicals produced by plants that stimulate stem elongation, seed germination, and flowering 2. auxins hormone that promotes ripening...

question

Business, 27.06.2019 03:40

The money market in the united states, the investment demand, aggregate demand, and aggregate supply curves are as shown in the graphs below. currentl...

question

Chemistry, 27.06.2019 03:40

Read "the ozone hole" and answer the question below. use examples from the article to explain one positive and one negative effect that chemistry has...

question

English, 27.06.2019 03:40

Create two sentences, ensuring that the verb is in active voice. be sure that your sentence has both a subject and a verb, and expresses a complete th...

question

English, 27.06.2019 03:40

Answer very very ! ! read the excerpt from “the discovery of oz, the terrible.” "just to amuse myself, and keep the good people busy, i ordered them...

question

Mathematics, 27.06.2019 03:40

Katie is watching a helicopter flying at an altitude of 5 miles. if the angle of elevation is , the distance between katie and the helicopter is appro...

question

Mathematics, 27.06.2019 03:40

Each statement describes a transformation of the graph of y = in x. which statement correctly describes the graph of y = in(x - 7) + 3?...

question

Mathematics, 27.06.2019 03:40

Nicolas has three fewer than twice the number of songs downloaded as sabrina does. interpret the meaning of the expression 2x – 3. the expression 2x...

question

Mathematics, 27.06.2019 03:40

Which statement about circle o is necessarily true, assuming and are tangents to circle o?...

question

Biology, 27.06.2019 03:40

The rates of photosynthesis and cellular respiration most affect which biochemical cycle?...

question

English, 27.06.2019 03:40

"bother the dinner! " cried my uncle. but as i was hungry, i sallied forth to the dining room, where i took up my usual quarters. jules verne. a journ...

question

Mathematics, 27.06.2019 03:40

27 identical small cubes are combined to form a big cube with a volume of 1728 cm3 . the first layer of small cubes is removed from the composite shap...

More questions: Chemistry Another questions

Questions on the website: 13722362