Answer:
D has to be based on facts so d would be the answer and idea that can only be proven true those are facts not hypothesis or guesses
Explanation:
based on a body of facts that have been repeatedly confirmed through observation and experiment. Such fact-supported theories are not "guesses" but reliable accounts of the real world."
Each kind of scientist is matched with an aspect of the hot spring he or she is most likely to study as follows:
- <u>Geologist:</u> rocks around and under the hot spring.
- <u>Ecologist:</u> relationships between organisms and the hot spring.
- <u>Sociologist:</u> human behavior around the hot spring.
- <u>Meteorologist:</u> atmosphere and weather around the hot spring.
<h3>What is a scientific observation?</h3>
A scientific observation can be defined as an active acquisition of knowledge (information) through one of the sense organs, while using scientific tools and instruments.
<h3>The types of
scientific observation.</h3>
In Science, there are two main types of scientific observation and these include the following:
<h3>What is a
hot spring?</h3>
A hot spring can be defined as a natural or an artificially-induced phenomena in which very hot groundwater flows out from the Earth's crust due to the heat present in the geosphere.
In this exercise, you're required to match each kind of scientist with an aspect of the hot spring he or she is most likely to study as follows:
- <u>Geologist:</u> rocks around and under the hot spring.
- <u>Ecologist:</u> relationships between organisms and the hot spring.
- <u>Sociologist:</u> human behavior around the hot spring.
- <u>Meteorologist:</u> atmosphere and weather around the hot spring.
Read more on hot springs here: brainly.com/question/4421633
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Complete Question:
Match each kind of scientist with an aspect of the hot spring she or he might study.
A. Geologist
B. Ecologist
C. Sociologist
D. Meteorologist
1. Relationships between organisms and the hot spring.
2. Human behavior around the hot spring.
3. Rocks around and under the hot spring.
4. Atmosphere and weather around the hot spring.
39.25 g of water (H₂O)
Explanation:
We have the following chemical reaction:
2 H₂ + O₂ → 2 H₂O
Now we calculate the number of moles of each reactant:
number of moles = mass / molar weight
number of moles of H₂ = 14.8 / 2 = 7.4 moles
number of moles of O₂ = 34.8 / 32 = 1.09 moles
We see from the chemical reaction that 2 moles of H₂ will react with 1 mole of O₂ so 7.4 moles of H₂ will react with 3.7 moles of O₂ but we only have 1.09 moles of O₂ available. The O₂ will be the limiting reactant. Knowing this we devise the following reasoning:
if 1 moles of O₂ produces 2 moles of H₂O
then 1.09 moles of O₂ produces X moles of H₂O
X = (1.09 × 2) / 1 = 2.18 moles of H₂O
mass = number of moles × molar weight
mass of H₂O = 2.18 × 18 = 39.25 g
Learn more about:
limiting reactant
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Answer:
HF(aq)+NaOH(aq)→NaF(aq)+H2O(l)
Explanation:
Complete question
Dissolved hydrofluoric acid reacts with dissolved sodium hydroxide to form water and aqueous sodium fluoride. What is the net ionic equation
Equilibrium equation between the undissociated acid and the dissociated ions
HF(aq)⇌H+(aq)+F−(aq)
Sodium hydroxide will dissociate aqueous solution to produce sodium cations, Na+, and hydroxide anions, OH−
NaOH(aq)→Na+(aq)+OH−(aq)
Hydroxide anions and the hydrogen cations will neutralize each other to produce water.
H+(aq)+OH−(aq)→H2O(l)
On combining both the equation, we get –
HF(aq)+Na+(aq)+OH−(aq)→Na+(aq)+F−(aq)+H2O(l)
The Final equation is
HF(aq)+NaOH(aq)→NaF(aq)+H2O(l)
