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Pre-assessment:
choose the letter of the correct answer
35%
250-q chocolate mousse which is
chocolate, 30% cream, 20% milk. 10%
a to prepare a
much cream are you going to use?
m, 20% milk 10% sugar, and 5%
sugar
butter, how
a 75 g cream
c.73 g cream
b.60 g cream
0.62 g cream
2. cheska measured the mass of 10 pieces of each of
e mass of 10 pieces of each of the following materials:
marble, pebble, and ballpen cap. what will be
ballpen cap. what will be her findings based on the data
she obtained?
table 1. data on mass
materials
(10 pieces)
marble
pebble
ballpen cap
mass
(9)
50
35
20
s have diffes differ
a. different materials have different masses.
b. materials of different kinds differ in amount, color, and texture.
c. the same number of materials has different colors and appearance.
d. the same number of materials of different kinds has different masses.
different
3. the following are representative particles of matter. which among them
represents a covalent compound?
a. atom
c. molecule
b. ion
d. particle unit
4. a bag of npk fertilizer marked 16-4-8 contains 16% nitrogen, 4%
phosphorous and 8% potassium, the other 72% is usually inert filler material
such as clay pellets or granular limestone. what is the mass of nitrogen
present in the 500g pack of npk fertilizer?
a. 80g
c. 209
b. 40g
d. 109
5. how many particles are equal to 1 mole?
a. 6.02 x 1022 particles
c. 6.02 x 1024 particles
b. 6.02 x 10- particles
d. 6.02 x 10"particles
6. how can the knowledge about mole be useful for environmentalists?
a. mole concept can be used in environmental monitoring.
b. it gives information on the most dangerous pollutant in the atmosphere.
c. it gives a feedback on the kinds of pollutants present in the atmosphere
d. mole concept can be used in quantifying the amount of pollutant-
particles released in the atmosphere.
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Answers

  • Réponse publiée par: kuanjunjunkuan

    Hans Christian Oersted

    Explanation:

    Oersted's famous experiment showing that electricity and magnetism are linked, took place during a lecture on April 21, 1820, when Oersted was 42 years old. In the experiment he passed electric current through a wire, which caused a nearby magnetic compass needle to move.

  • Réponse publiée par: 123gra

    On 29th August 1831, Michael Faraday conducted an experiment with an iron ring, some copper wire and a big 4 inch plate battery. He was investigating the phenomenon known as electro-magnetism.

  • Réponse publiée par: 09389706948

    used in chemistry laboratories for supporting apparatus above the work surface

    Explanation:

  • Réponse publiée par: elaineeee
    D.moles concept can be used in quantifying the amount of pollutant particles released in the atmosphere.
  • Réponse publiée par: hellcrack777
    The answer is letter D :)
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Pre-assessment: choose the letter of the correct answer35%250-q chocolate mousse which ischocolate,...