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Fynjy0 [20]
3 years ago
10

Which milligram quantity contains a total of four significant figures

Chemistry
2 answers:
denis23 [38]3 years ago
7 0
D has a total of four significant figures.
Ksenya-84 [330]3 years ago
3 0

Answer:

D

Explanation:

The first 0 is sandwiched between the 3&1 and a ending 0 that is after the decimal is significant.

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Differentiate between alpha and beta and gamma rays
ElenaW [278]

Answer:

Alpha particles are energetic (fast) helium nuclei, beta particles are smaller and have half the charge, being energetic electrons (or positrons) only the gamma particles are photons, i.e., they are not massive particles at all, they are a form of electromagnetic radiation, a form more energetic than X-rays

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Arya drops a small sample of brown iodine into a beaker of water.
kiruha [24]
A the iodine spreads evenly throughout the water
8 0
4 years ago
How many grams of silver bromide are produced when 505 grams of cobalt (III) bromide reacts completely in the following equation
DedPeter [7]
Mass = 473.2 g
Explanation:
Given data:
Mass of cobalt(III) nitrate = 206 g
Mass of silver bromide produced = ?
Solution:
Chemical equation:
CoBr₃ + 3AgNO₃ → 3AgBr + Co(NO₃)₃
Number of moles of cobalt(III) nitrate:
Number of moles = mass/ molar mass
Number of moles = 206 g/ 245 g/mol
Number of moles = 0.84 mol
Now we will compare the moles of cobalt(III) nitrate with silver bromide.
7 0
3 years ago
What is the relationship between the number of carbon atoms in hydrocarbon at its boiling point ?
saveliy_v [14]
  • If no of carbon atoms be C
  • Boiling point of compound be BP

So

\\ \tt\longmapsto C\propto BP

  • No of carbon atoms is directly proportional to the boiling point of the compound.
  • If no of carbon atoms increases in a hydrocarbon the length of carbon chain also increases and all carbons get wrapped around themselves.
  • Which causes increase in boiling point of compound.

Look the table below for the boiling points of some alkanes

\boxed{\begin{array}{c|c}\boxed{\bf Alkane}&\boxed{\bf Boiling point}\\ \sf CH_4&\sf -164°C \\ \sf C_2H_6 &\sf -88.6°C \\ \sf C_3H_8&\sf 42.1°C \\ \sf C_4H_{10} &\sf -0.5°C \\ \sf C_5H_{12} &\sf 36.1°C \\ \sf C_6H_{14} &\sf 68.9°C \\ \sf C_7H_{16} &\sf 98.4°C \\ \sf C_8H_{18} &\sf 125.7°C \\ \sf C_9H_{20} &\sf 150.4°C \\ \sf C_{10}H_{22} &\sf 150.7°C \end{array}}

8 0
2 years ago
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