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Alex_Xolod [135]
2 years ago
12

Help science periodic table

Chemistry
2 answers:
laila [671]2 years ago
5 0
Its all right here :))))

romanna [79]2 years ago
3 0
All the answers are on the actual periodic table. You should never be told to remember it so I think this is a recourse you are allowed to look at whilst doing your homework lol :) all the answers are written on it hope it helps

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In the city a street peddler offers you a diamond ring for 30 bucks how can you test the rock
larisa86 [58]

Explanation:

Hardness test — Scratch the rock with a fingernail, a copper penny, a glass plate or nail, and a ceramic plate. Check your Guide to assign it a rating on the Mohs Scale of Hardness.

Color streak test — Test for the “color streak” of the minerals by rubbing the rock across the ceramic plate in the Mineral Test Kit, or across smooth

cement. Look up which colors indicate which minerals are present.

Magnetism test — Hold the magnet in the Mineral Test Kit near your rock. If there is a magnetic pull, it has a metal mineral in it.

Acidity test — Put vinegar in the bottle included in the Mineral Test Kit. Squeeze out a few drops on the rock. If it fizzes, it contains carbonate.

A quick and easy way to find out whether your diamond is real or fake: try fogging it up with your breath. If it clears up after one or two seconds, then your diamond is real, but if it stays fogged for three to four seconds chances are that you're looking at a fake.

3 0
3 years ago
How can i express 13111kg as an integer
torisob [31]
13111 is already an integer (whole number). It also can be expressed as 1 ton or 13111000g.
5 0
2 years ago
What is 6421 in scientific notation
Lynna [10]
The scientific notation should specific the significant digits. So it to write like x.xx * 10 ^ x. So the answer is 6.421 * 10 ^3.
4 0
2 years ago
H2O2 → H2O + O2
vladimir2022 [97]

Answer:

75.47

Explanation:

AS WE CANT WEIGHT AIR THE ANSWER IS CORRECT

8 0
2 years ago
. Calculate the number of moles in 56g of H20
svetoff [14.1K]
<h3>Answer:</h3>

3.11 moles

<h3>Explanation:</h3>

We are given 56 g of water (H₂O)

Required to calculate the number of moles of water.

  • The relationship between moles, mass and molar mass is given by;
  • Moles = Mass ÷ molar mass

in this case;

  • Mass of water = 56 g
  • Molar mass of water = 18.02 g/mol

Therefore;

Moles of water = 56 g ÷ 18.02 g/mol

                         = 3.11 moles

Therefore, moles of water in 56 g will be 3.11 moles

8 0
2 years ago
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