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Eddi Din [679]
3 years ago
12

Scientific predictions based on laws are formulated using:

Chemistry
2 answers:
abruzzese [7]3 years ago
7 0

Answer:

A. deductive reasoning

Artist 52 [7]3 years ago
3 0
The answer is definitely A
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What does the atomic number of an element specify? what does the atomic number of an element specify?
GREYUIT [131]
The atomic number of an element identifies the number of protons and electrons.
8 0
3 years ago
How many protons and electrons are present in Au+?
balandron [24]

Answer:

Protons: 79

Electrons: 78

Explanation:

1. The number of protons is the atomic number (The atomic number for Au on the periodic table is 79)

2. Since the charge is +1 (positive) it means that there's one more proton than electrons. So, 79-1 = 78 electrons

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3 years ago
Is metal rusting a chemical reaction? Yes or no
mars1129 [50]

Answer: Yes it is. Rust would be considered a chemical reaction because it changes the chemical makeup of the metal.

Explanation:

5 0
2 years ago
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What is the [H+] concentration of blood, given the ph is 2.5?
belka [17]

Answer:

0.00316

Explanation:

You have to use the following equation:

pH=-log[H^+]

You are given the pH and need to find the concentration of H+.  Plug in the given components and solve.

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The concentration of H is 0.00316.

8 0
2 years ago
A sample of gas occupies 10.0 l at 100.0 torr and 27.0
disa [49]
The pressure  of a sample  of a gas if the temperature  is changed  to 127  c  while  the volume  remains  constant   is calculated  using gay lussac law formula

that is P1/T1 = P2/V2
P1 = 100 torr
T1 = 27+273 = 300 k
T2 =127 +273 =400 k
P2=?

by  making P2 the subject of the formula
P2=T2P1/T1

=100  x 400/300 = 133.3 torr

5 0
3 years ago
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