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Burka [1]
2 years ago
8

L 1.4.2 Quiz: Scientific Practices

Chemistry
1 answer:
9966 [12]2 years ago
5 0

Answer:

O B. Experimental group

Explanation:

An experimental group is a test sample or the group that receives an experimental procedure. This group is exposed to changes in the independent variable being tested.

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What best explains why sodium is more likely to react with another element than an element such as neon
goblinko [34]

Answer: Neon is not reactive (full valence shell)

Explanation:

Neon is a noble gas and has a stable structure (8 valence electrons) -therefore, is not very reactive.

3 0
3 years ago
How many millimeters of 1.58 M HCl are needed to react completely with 23.2 g of NaHCO3
KonstantinChe [14]
<span>So we need 0.276 moles of HCl to react. Your concentration is given in moles/liter so 0.276/1.58 = 0.174 liters needed or 174 milliliters</span>
8 0
3 years ago
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You are determining the density of an unknown solid. You figure out the volume by water displacement. Then you weigh the solid,
WINSTONCH [101]

Answer:

The calculated density will be larger

Explanation:

The calculated density will be <u>larger</u>. Because, the volume is taken accurately, by the water displacement method. But, when we the took the mass, the water was present on the unknown solid. So, the mass of that water was added to the original mass of the solid. Hence, the mass measured was larger than the original mass. We, know from the formula of density that density is directly proportional to the mass of the object.

Density = Mass/Volume

Hence, the larger measured mass means the larger value of density.

8 0
3 years ago
Which the following statement ia correct for the equation shown here​
Shkiper50 [21]
B.

As you can see both NO and NH3 have 4 moles therefore it is 4:4 between the molecules or in other words a 1:1 ratio in simplest forms
7 0
3 years ago
Heating chemicals is defined by the process of combustion.<br> A. True<br> B. False
padilas [110]
Answer: A. True

Explanation: Combustion is a chemical process in which a substance reacts rapidly with oxygen and gives off heat. The original substance is called the fuel, and the source of oxygen is called the oxidizer. ... During combustion, new chemical substances are created from the fuel and the oxidizer.
3 0
3 years ago
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