1. A block of solid copper at room temperature is heated to 1200 degree celcius where it melts forming liquid copper. This process represents a. A. Physical change to the copper b. Chemical change to the copper c. Measuremement of the boiling point of copper d. Chemical property of copper e. Chemical reaction of copper 2. Isopropyl alcohol is an organic liquid at room temperature with the chemical formula of C3 H8 O. Classify isopropyl alchol as one of the following. A. Element b. Compound c. Homogeneous mixtures d. Heterogeneous mixture e. None of the above 3. Ammonium phosphate, (NH4)3 PO4, is used in fertilizer to supply nitrogen and phosphorus to the soil. What is the total number atoms in one molecule of ammonium phosphate? A. 10 b. 13 c. 18 d. 20 e. None of the above 4. What is the term for a change of state from a liquid to a gas? A. Melting b. Condensation c. Evaporation d. Sublimation e. None of the above 5. How many neutrons are in the nucleus of an atom of Silver with a mass of 108? a. 47 b. 68 c. 61 d. 108 e. 155 6. An atom with an atomic number of 38 and a mass number if 88 represents the element? A. Argon b. Strontium c. Tin d. Radium e. No such atom exists 7. The common subatomic particle below with the smallest mass is the a. Atom b. Boron c. Proton d. Neutron e. Electron please give the correct answer with correct letter explain pleasr answer all questipns
1. A block of solid copper at room temperature is heated to 1200 degree celcius where it melts forming liquid copper. This process represents a.
A. Physical change to the copper
b. Chemical change to the copper
c. Measuremement of the boiling point of copper
d. Chemical property of copper
e.
2. Isopropyl alcohol is an organic liquid at room temperature with the chemical formula of C3 H8 O. Classify isopropyl alchol as one of the following.
A. Element
b. Compound
c. Homogeneous mixtures
d. Heterogeneous mixture
e. None of the above
3. Ammonium phosphate, (NH4)3 PO4, is used in fertilizer to supply nitrogen and phosphorus to the soil. What is the total number atoms in one molecule of ammonium phosphate?
A. 10
b. 13
c. 18
d. 20
e. None of the above
4. What is the term for a change of state from a liquid to a gas?
A. Melting
b. Condensation
c. Evaporation
d. Sublimation
e. None of the above
5. How many neutrons are in the nucleus of an atom of Silver with a mass of 108?
a. 47
b. 68
c. 61
d. 108
e. 155
6. An atom with an
A. Argon
b. Strontium
c. Tin
d. Radium
e. No such atom exists
7. The common subatomic particle below with the smallest mass is the
a. Atom
b. Boron
c. Proton
d. Neutron
e. Electron
please give the correct answer with correct letter explain pleasr answer all questipns
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