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castortr0y [4]
3 years ago
15

Plz answer question! Due Today!!! Question is in picture! Will make BRAINLIEST for first correct answer!!! No links plz!

Chemistry
2 answers:
beks73 [17]3 years ago
4 0
I believe your answer is B
iris [78.8K]3 years ago
3 0

Answer:

I'd Go. B. weigh everything, let the reaction happen, then weigh everything again.

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Which fields of science do you think might use data tables and graphs more than others
Tamiku [17]

Answer:

Statistics

Explanation:

The science of statistics deals with the collection, storage, manipulation, analyzing, visualizing and interpretation of data. Graphs and tables are very good tools in order to achieve statistical problems. Tables can be used to compare a given data set and present them in a very simple relational way. Graphs are useful for data visualization and their trend is vital in making interpretations.

6 0
3 years ago
In an equimolar mixture of o2 and n2, are the mass fractions equal?
nika2105 [10]

Answer:

No

Explanation:

The mass fraction is defined as:

w_{i}=\frac{m_{i} }{m_{t} }

where:

  • wi: mass fraction of the substance i
  • mi: mass of the substance i
  • mt: total mass of the system

<u><em>The mass fraction of two substances (A and B), will be the same, ONLY if the mass of the substance A (mA) is the same as the mass of the substance B (mB).</em></u>

An equimolar mixutre of O2 and N2 has the same amount of moles of oxygen and nitrogen, just to give an example let's say that the system has 1 mole of O2 and 1 mole of N2. Then using the molecuar weigth of each of them we can calculate the mass:

mA= 1 mole of O2 * 16 g/1mol = 16 g

mB=1 mole of N2 *28 g/1mol=28 g

As mA≠mB then the mass fractions are not equal, so the answear is NO.

4 0
3 years ago
What occurs when a magnesium atom becomes a magnesium ion
Karo-lina-s [1.5K]
The electrons are lost.
4 0
3 years ago
Read 2 more answers
Based on the information provided in the graph, we can see that as the independent variable increases,
Gnom [1K]
Well I have no clue on what your class is doing but to me, it looks like B. the dependent variable also increases

4 0
3 years ago
Read 2 more answers
Most chemical reactions involve the evolution or absorption of heat energy. True or False
sergejj [24]

Answer:

True

Explanation:

The majority of the reactions happened with a flow of heat. When there's no heat, the reaction is adiabatic.

For no adiabatic reactions, the heat can be released (evolution) by the system, so the reaction will be exothermic, or absorbed by the system (absorption), then the reaction is called endothermic.

7 0
3 years ago
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