Answer:
copper(ll) carbonate
Explanation:
Since the product is a salt which is copper(II) carbonate, water and carbon dioxide, this reaction is an acid + metal carbonate reaction.
Looking at the salt, Cu²⁺ has to be part of the reactants.
Hence, the missing compound there has to be copper(ll) carbonate, CuCO₃.
The balanced chemical equation would be:
CuCO₃ + 2HNO₃➙ Cu(NO₃)₂ +H₂O +CO₂
P.s. You left out CO₂ as a product in Q2 ;)
Just a recap of the main reactions you would've learnt:
1) Acid + base/ alkali ➙ salt + water
2) Acid + metal ➙ salt + hydrogen gas
3) Acid + metal carbonate ➙ salt + H₂O + CO₂
Answer:
Ammonia is an Arrhenius base and a Brønsted-Lowry base.
Explanation:
An Arrhenius base is any substance which, when it is dissolved in an aqueous solution, produces hydroxide (OH^-), ions in solution. An aqueous solution is a solution that has water present in it.
A Bronsted-Lowry base is a substance that accepts a proton, that is, a hydrogen ion (H^+).
Looking at the equation above, ammonia satisfies both characteristics. We can see that when ammonia is dissolved in water, hydroxide ions is produced in the solution. Hence it is an Arrhenius base. Similarly, the hydroxide ion is formed when ammonia accepts a proton. This is a characteristic of a Brownstead-Lowry base. Hence ammonia is both an Arrhenius base and a Brownstead-Lowry base.
The choices here are:
<span> a. harder c. more dense b. shinier d. more reactive
The answer is "harder".
The Moh's Scale is also known as the </span><span>Mohs scale of mineral hardness. This scale is basin gon the ability of one certain material to visibly scratch another material. 1 Talc 2 Gypsum 3 Calcite 4 Fluorite 5 Apatite 6 Feldspar 7 Quartz 8 Topaz 9 Corundum 10 Diamond.</span>
Color (intensive) with a color pallet or a colorimeter or spectrophotometerdensity (intensive) with a balance and a water-filled cylindervolume (extensive) with a cylindermass (extensive) with a balance
boiling point (intensive): the temperature at which a substance boils (with a thermometermelting point (intensive): the temperature at which a substance melts
temperature<span>, pressure, and </span>density<span>. A few other examples are </span>heat<span> capacity, </span><span> </span>thermal<span> conductivity, and electrical conductivity.
conductometer,
</span>
Answer: Option (d) is correct.
EXplanation:
The susceptibility to search for interpreted data in such a way that confirms the hypothesis is known as confirmation bias.
Scientific consensus is the collective decision or opinion of scientists in an experiment or study.
Peer view is the collective view of two or more persons in an experiment that will lead to a collective conclusion.
Selection bias is the bias that occurs because of selection of data due to which proper results are not obtained.
Therefore, when two scientists work together on an experiment but they have different hypothesis and when the scientist look at experimental results they interpret the data in different ways and come up with different conclusions, this situation is a confirmation bias.
Thus, out of the given options, option (d) is correct.
