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marysya [2.9K]
3 years ago
14

2.0 L of a gas is at STP. What is the new pressure in kPa if the volume changes to 10.5 L and the temperature and # of molecules

remain constant?
Chemistry
1 answer:
Alexandra [31]3 years ago
5 0

Answer:

What is the new volume if the temperature is constant? V=2.50L. P = lookPa. P2=40k Pa. V2 = x. PV = P2 ... If a sample of gas occupies 6.8 L at 327°C

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the movement of molecules from an area of low concentration to an area of high concentration occurs in what transport?
solmaris [256]
Movement of molecules from an area of higher concentration to one of lower concentration is called Diffusion
4 0
3 years ago
Consider the temperature versus time graph below. I which region is the substance in both the solid phase and the liquid phase?
SVEN [57.7K]

Answer:

2

Explanation:

The change of state occurs at a constant temperture and pressure. In the grahp we can see while the time passes, the temperature doesn't change.

The rect number 4 correspond to a liquid-gas phase

8 0
3 years ago
Read 2 more answers
35.0 grams of nitrogen gas reacts with 60.0 grams of hydrogen gas: N2 + 3H2--> 2NH3
Misha Larkins [42]

Explanation:

Moles of N2 = 35.0g / (28g/mol) = 1.25mol

Moles of H2 = 60.0g / (2g/mol) = 30.0mol

Since 1.25mol * 3 < 30.0mol, nitrogen is limiting.

Moles of NH3 = 1.25mol * 2 = 2.50mol.

Mass of NH3 = 2.50mol * (17g/mol) = 42.5g.

30.0mol - 1.25mol * 3 = 26.25mol.

Excess mass of H2

= 26.25mol * (2g/mol) = 52.5g.

6 0
3 years ago
Brian's aunt has cats. When Brian recently visited her, he started sneezing badly and believes that it was because
kifflom [539]

Answer:

By visiting other households with cats.

Explanation:

This will give Brian a variety of other houses and determine if it is truly cats or just alleries from other items. This is the most direct way to get Brian the answer he is looking for.

4 0
3 years ago
Part A Which of the following groups comprise the s-block of elements? View Available Hint(s) A) groups 3-12 B) group 18 C) grou
Yakvenalex [24]

Answer:

D)groups 1 and 2 ​

Explanation:

The s-block of elements are made up of those chemical elements we can find in groups 1 and 2 on the periodic table.

A periodic table of element is based on the periodic law which states that "the properties of elements are a periodic function of their atomic number".

In the table;

  • elements having the same number of electrons in the outermost shell are placed over one another in vertical columns.
  • each resulting vertical column is called a group or family.
  • resulting horizontal rows are known as periods.  

The s-block consists of elements in groups 1 and 2 having an outermost ""ns"" shell configuration. They are predominantly metals.

For Option A, groups 3-12 is the D-block

Option B, group 18 is filled with noble gases and it makes up the p-block

Option C, group 13-18 is makes up the p-block too.

So, the s-block is made up group 1 and 2 elements.

7 0
3 years ago
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