a solution in which 50 grams of solute is dissolved in 250 grams of solution has a concentration of what percent?

Answers

Answer 1

Answer: 16.66667% or 17% to the nearest percent. (50/(250+50)) x 100 or (50/300) x 100. I hope you can see how I got to those numbers.

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Is bro2 polar or nonpolar

Answers

Bro2 is polar because the rules for overall polarity of Neutral Species Arrangement of Group Linear Trigonal Planar Tetrahedral Trigonal Bipyramidal Octahedral Polarity if atoms on either side of the center atom are different, the species is polar if any group around the central atom is different.

The volume of a gas is 8.0 L at 9.9°C and {P3} atm. What volume will the gas occupy if thetemperature is raised to 9.3°C at constant pressure?
Select one:
O a. 7.98
Ob.0.263
C. 8.02
O d. 228

Answers

Answer:

Option A. 7.98 L.

Explanation:

The following data were obtained from the question:

Initial volume (V1) = 8 L

Initial temperature (T1) = 9.9 °C

Final temperature (T2) = 9.3 °C

Final volume (V2) =..?

Next, we shall convert celsius temperature to Kelvin temperature. This can be achieved as shown below:

Temperature (K) = temperature (°C) + 273

T(K) = T (°C) + 273

Initial temperature (T1) = 9.9 °C

Initial temperature (T1) = 9.9 °C + 273 = 282.9 K

Final temperature (T2) = 9.3 °C

Final temperature (T2) = 9.3 °C + 273 = 282.3 K

Finally, we shall determine the new volume of the gas as follow:

Initial volume (V1) = 8 L

Initial temperature (T1) = 282.9 K

Final temperature (T2) = 282.3 K

Final volume (V2) =..?

V1/T1 = V2/T2

8/282.9 = V2/282.3

Cross multiply

282.9 x V2 = 8 x 282.3

Divide both side by 282.9

V2 = (8 x 282.3)/282.9

V2 = 7.98 L

Therefore, the new volume of the gas is 7.98 L

How many double bonds are in an alkane?

Answers

None
Alkanes only have single bonds

Final answer:

Alkanes are hydrocarbons with only single bonds between the carbon atoms, therefore, they do not contain any double bonds.

Explanation:

In chemistry, an alkane is a type of hydrocarbon where all of the carbon-carbon bonds are single bonds, meaning they share just one pair of electrons. Double bonds share two pairs of electrons and are typically found in alkenes, a different type of hydrocarbon. Therefore, an alkane does not have any double bonds.

Learn more about Alkanes here:

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Not chemistry but I need help. Someone plz answer these

Answers

9.Each lichen is made up of a fungus (usually an ascomycete) and an alga (green or blue-green). 14.It is a member of the group of diseases known as tinea. 7.Most fungi prefer moist locations, but again there are exceptions, such as the fungi that grow on dried grains. 10.A sac, typically cylindrical in shape, in which the spores of ascomycete fungi develop. 11.A microscopic, club-shaped spore-bearing structure produced by certain fungi. 12.(in ferns and lower plants) a receptacle in which asexual spores are formed. 13.Yeast cells thrive on simple sugars. As the sugars are metabolized, carbon dioxide and alcohol are released into the bread dough, making it rise. 8.Never pick and eat wild mushrooms unless they've been identified by an expert! ... Cooking doesn't make a poisonous mushroom safe. In fact, you can be poisoned by breathing in the cooking fumes from some poisonous mushrooms. Even non-poisonous mushrooms can cause unpleasant reactions in people who are sensitive to them. 6.Saprophytes play an important role in soil biology. They break down dead and decaying organic matter into simple substances that can be taken up and recycled by plants. ... Saprophytic fungi use enzymes to decompose biologic material. Parasitic fungi destroy bacteria and other pathogens.

What are the two gases that escaped Earth's atmosphere during early formation? A. Helium and nitrogen
B. Helium and oxygen
C. Hydrogen and helium
D. Hydrogen and nitrogen

Answers

Answer: Option (C)

Explanation: Hydrogen and Helium initially, both were present on the earth's atmosphere. But later they were reduced upto a huge extent. Due to the location of earth near to the sun, these gases must have evaporated from the earth's atmosphere. At present the amount of hydrogen and helium is very less.

Thus, the correct answer is option (C).

Answer: C - Hydrogen and Helium

Locate the element xenon (Xe) on the periodic table and click on the square. What class of element is xenon found in? A)nonmetal B)halogen c)noble gas D)alkali metal

Answers

It's C. noble gas enjoy.

Answer:

noble gas

Explanation:

I took the test hope you got it right :)

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