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Dahasolnce [82]
3 years ago
15

Which sample of matter is classified as a substance? (1) air (3) milk(2) ammonia (4) seawater

Chemistry
1 answer:
jeyben [28]3 years ago
3 0
A chemical substance has the characteristics that it cannot be separated by physical  methods. Seawater and milk can be separated by sedimentation, and air has different components depending on other aspects (such as elevation). Only ammonia is a substance. (thus it can have a formula: NH<span>3)</span>
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PLEASE HELP What is the mass of sodium in 50 grams of salt? Show your work.
Inessa05 [86]

50 grams salt

Volume of 50 Grams of Salt

50 Grams of Salt =

2.78 Tablespoons

8.33 Teaspoons

0.17 U.S. Cups

0.14 Imperial Cups

4 0
3 years ago
Read 2 more answers
A sample of oxygen gas has a volume of 36.7 L at 145 kPa and 65. ̊C. What volume will the sample have at STP?
xxTIMURxx [149]
Data Given:

                  Initial Volume = V₁ =  36.7 L

                  Initial Pressure = P₁ =  145 kPa

                  Initial Temperature = T₁ =  65 °C + 273 = 338 K

                  Final Volume = V₂ = ?

                  Final Pressure = P₂ = 101.325 kPa           (Standard Pressure)

                  Final Temperature = T₂ = 273 K                (Standard Temperature)

Formula used:
                      As number of moles are constant, so Ideal Gas equation in following form is used,
                                        P₁ V₁ / T₁  =  P₂ V₂ / T₂
Solving for V₂,
                                    V₂  = P₁ V₁ T₂ / T₁ P₂
Putting Values,

                  V₂ = (145 kPa × 36.7 L × 338 K) ÷ (273 K × 101.325 kPa)

                  V₂ = 1798667 ÷ 27661.25

                  V₂ = 65.02 L
8 0
3 years ago
Which properties does uranium-238 have?
podryga [215]

The main properties of uranium-238 are as follows,

  • The uranium-238 have orthorhombic crystal structure.
  • The physical state of  uranium-238 is solid.
  • The  uranium-238  have acid base properties.
  • The uranium-238 have hard and silver white metal.
  • The natural abundance of  uranium-238 is 99%

The Atomic mass and atomic weight of  uranium-238

  • The atomic number of uranium-238 is 92
  • The atomic weight of uranium-238 is 238.02

learn about uranium-238

brainly.com/question/9099776

#SPJ4

5 0
2 years ago
If you can have a anime super power what would it be ​
nydimaria [60]

Answer:

time travel swordman magic

8 0
3 years ago
You are given 100.0 ml of a 2.0 M solution of KOH. What would be the molarity of the solution if it is diluted to a volume of 10
Lostsunrise [7]

Answer:

0.2M

Explanation:

Data obtained from the question include:

C1 = 2.0 M

V1 = 100mL

V2 = 1000mL

C2 =?

Using the dilution formula C1V1 = C2V2, the molarity of the diluted solution can be obtained as follows:

C1V1 = C2V2

2 x 100 = C2 x 1000

Divide both side by the 1000

C2 = (2 x 100) / 1000

C2 = 0.2M

The molarity of the diluted solution is 0.2M

8 0
3 years ago
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