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Alika [10]
3 years ago
13

Which of the following is always involved in a scientific inquiry?​

Chemistry
1 answer:
Oxana [17]3 years ago
8 0

Answer:

I think the answer is coming up with questions based on observations and reasoning

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Does the energy go from the surrounding to the chemicals or from the chemicals to the surround in an exothermic reaction?
Karo-lina-s [1.5K]
In general terms, exothermic reactions release energy, so the energy goes from the system to the surroundings.
4 0
3 years ago
NaOH is typically standardized using potassium hydrogen phthalate (KHP).
DaniilM [7]

Answer:

Na(OH)²

Explanation:

We look for the charges in the periodic table

6 0
2 years ago
Alkaline earth metals are very reactive because of how many valence electrons ?
Alborosie
Their is 2 valence electrons
8 0
3 years ago
The diameter of carbon atom is.000000000154m. What is this expressed in scientific notation.
Margarita [4]

1.54 x 10^-10

thats the answer

5 0
3 years ago
A hydrate is compound that included water molecules within its crystal structure. During an experiment to determine the percent
stellarik [79]

Answer:

The percent by mass of water in this crystal is:

  • <u>21.4%</u>

Explanation:

This exercise can be easily solved using a simple rule of three where the initial weight of the hydrated crystal (6,235 g) is taken into account as 100% of the mass, and the percentage to which the mass of 4.90 g corresponds (after getting warm). First, the values and unknown variable are established:

  • 6,235 g = 100%
  • 4.90 g = X

And the value of the variable X is found:

  • X = (4.90 g * 100%) / 6,235 g
  • X = approximately 78.6%.

The calculated value is not yet the percentage of the water, since the water after heating the glass has evaporated, therefore, the remaining percentage must be taken, which can be calculated by subtraction:

  • Water percentage = Total percentage - Percentage after heating.
  • <u>Water percentage = 100% - 78.6% = 21.4%</u>
4 0
3 years ago
Read 2 more answers
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