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castortr0y [4]
3 years ago
13

Which characteristic that a scientific measuring tool should have?

Chemistry
2 answers:
Likurg_2 [28]3 years ago
7 0
This would be measurements.
ivann1987 [24]3 years ago
4 0

Answer:

metric system

Explanation:

Scientists use the metric system, which uses the following base units: 1. Meter for length 2. Gram for mass 3. Liter for volume 4. Second for time Different prefixes

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How many moles are there in 2.00 x 10^19 molecules of CCl4
HACTEHA [7]

Answer: 0.0000332mol

Explanation: 1mole of CCl4 contains 6.02x10^23 molecules.

Therefore, X mol of CCl4 will contain 2 x 10^19 molecules i.e

Xmol of CCl4 = 2 x 10^19/ 6.02x10^23 = 0.0000332mol

7 0
3 years ago
A sample of aluminum is placed in a 25-ml graduated cylinder containing 10.0 ml of water. the level of the water rises to 18.0 m
OLga [1]
To determine the mass of the sample, first find the volume difference after and before the aluminum was placed, the volume change is equal to the volume of the submerged object, in this case aluminum.

Then knowing volume of aluminum and the density of it, we can solve for the mass.

D = m/v

Dv = m

2.7 g/ml • 8 ml = 21.6 grams.
5 0
3 years ago
Read 2 more answers
HEY I NEED ALL ANSWERS RIGHT NOW IT'S MISSING AND MY TEACHER ARE GRADING THEM NOW YOU WILL BE MARKED BRAINIEST
emmainna [20.7K]

Molar mass of butane:-

  • 4(12)+10=58u

Moles of Butane:-

  • 100/58=1.7mol

#16

  • 2mols of Butane produce 8mol CO_2
  • 1mol of butane produces 4mol CO_2

Moles of CO_2

  • 4(1.7)=6.8mol

Mass of CO_2:-

  • 44(6.8)=299.2g

#17

  • 2mols of butane need 13mol O_2
  • 1mol of butane needs 6.5mol O_2

Moles of O_2

  • 6.5(1.7)=11.05mol

Mass of O_2

  • 11.05(32)=353.6g
7 0
2 years ago
What makes organic compounds reactive?
konstantin123 [22]

Answer:

The functional groups

Explanation:

  • An organic compound is a compound that contain carbon and another element such as hydrogen, oxygen, nitrogen, etc.
  • Functional groups are the portions of an organic compound that is capable of characteristic reactions.
  • Functional groups determine the chemical and physical properties of many organic compounds.
3 0
3 years ago
What type of reaction is: br2 + nal2 ---> nabr + l2
Furkat [3]

Answer: its a single replacement reaction

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2 years ago
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