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Sloan [31]
3 years ago
15

Please help asap

Chemistry
2 answers:
saveliy_v [14]3 years ago
6 0
A liquid is a water base, a solid is a hard rock base and a gas a air base
Lorico [155]3 years ago
3 0

Answer:

bring the something that is liquid and something the is solid and gas is air so explain it to them by any thing that is liquid and solid and gas

Explanation:

You might be interested in
Natural atom of the same element may have the same _________?
Minchanka [31]

Answer:B

Explanation:

4 0
3 years ago
Read 2 more answers
Question 1 (Multiple Choice Worth 2 points)
Nookie1986 [14]

The scientific models are used because they allow scientists to make predictions and make it easier for scientists to avoid using data. option A and C is correct.

<h3>What are scientific models?</h3>

The scientific models are those which is given by scientists to allow them to make prediction about anything particular on which they are working or making research for it some examples are plum pudding model for an atom and bohr's model of an atom etc.

The biggest advantage is that scientists do not have to check the given data which are written into books they can perform their experiment and can conclude the data by performing experiment.

Therefore, scientific models are used because they allow scientists to make predictions and make it easier for scientists to avoid using data. option A and C is correct.

Learn more about scientific models, here:

brainly.com/question/1622233

#SPJ1

7 0
2 years ago
In plant cells, how are chloroplasts and mitochondria related?
guapka [62]

Answer:

Mitochondria are the "powerhouses" of the cell, breaking down fuel molecules and capturing energy in cellular respiration. Chloroplasts are found in plants and algae. They're responsible for capturing light energy to make sugars in photosynthesis.

5 0
3 years ago
An excess of oxygen reacts with 451.4 g of lead, forming 374.7 g of lead(II) oxide. Calculate the percent yield of the reaction.
Stels [109]

Answer: The percent yield of the reaction is 77.0 %

Explanation:

2Pb+O_2\rightarrow 2PbO

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}

\text{Number of moles of lead}=\frac{451.4g}{207.2g/mol}=2.18moles

\text{Number of moles of lead oxide}=\frac{374.7g}{223.2g/mol}=1.68moles

According to stoichiometry:

2 moles of Pb produces = 2 moles of PbO_2

2.18 moles of Pb is produced by=\frac{2}{2}\times 2.18=2.18moles of PbO_2

Mass of PbO_2 =moles\times {\text {Molar mass}}=2.18\times 223.2g/mol=486.6

percent yield =\frac{374.7g}{486.6g}\times 100=77.0\%

3 0
3 years ago
For the complete combustion of 47 g of gasoline (octane, C8H18) , the mass of oxygen consumed is
aleksklad [387]

Answer: d) 164.9 g

Explanation:

To calculate the moles :

\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}     \text{Moles of octane}=\frac{47g}{114g/mol}=0.412moles

The balanced chemical reaction is:

2C_8H_{18}(l)+25O_2(g)\rightarrow 16CO_2(g)+18H_2O(g)  

According to stoichiometry :

2 moles of C_8H_{18} require = 25  moles of O_2

Thus 0.412 moles of C_8H_{18} will require=\frac{25}{2}\times 0.412=5.15moles  of O_2

Mass of O_2=moles\times {\text {Molar mass}}=5.15moles\times 32g/mol=164.9g

Thus 164.9 g of oxygen is consumed.

4 0
3 years ago
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