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Nitella [24]
3 years ago
13

Charlie is balancing an equation. She has identified the atoms and counted the number of each in the reactants and products. Wha

t would Charlie adjust to make the number of atoms in the reactants the same as the number of atoms in the products?
Chemistry
2 answers:
WITCHER [35]3 years ago
6 0

Answer:

The stoichiometric coefficients.

Explanation:

Hello,

Chemical reactions are widely generalized by the following chemical equation:

aA+bB-->cC+dD

Capitalized letters are referred to both the reacting and produced species during the chemical reaction meanwhile the lowered case letters are referred to the stoichiometric coefficients which balance the chemical reaction. Balancing means that the number of atoms in the reagents must be equal to the number of atoms in the products, this is exemplified via the following balanced chemical reaction:

2HCl+Ca(OH)_2-->CaCl_2+2H_2O

The coefficient 2 in the hydrochloric acid is set due to the produced calcium chloride which has two chlorine atoms in order to equal them.

Best regards.

const2013 [10]3 years ago
4 0

Answer: Stochiometric coefficients

Explanation: The chemical equations must be balanced to follow the law of conservation of mass which says that the mass of products must be same as the mass of reactants.

CH_4+O_2\rightarrow CO_2+H_2O

This is a skeletal equation  and needs to be balanced by adjusting the stochiometric coefficients. In order to keep the mass same, the number of atoms must be same on both sides.  

CH_4+2O_2\rightarrow CO_2+2H_2O


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gayaneshka [121]

Answer:

10°C  

Explanation:

Heat gain by water = Heat lost by the slice of pizza

Thus,    

m_{water}\times C_{water}\times \Delta T=Q

<u>For water:  </u>

Volume = 50.0 L

Density of water= 1 kg/L  

So, mass of the water:  

Mass\ of\ water=Density \times {Volume\ of\ water}  

Mass\ of\ water=1 kg/L \times {50.0\ L}  

Mass of water  = 50 kg

Specific heat of water = 1 kcal/kg°C  

ΔT = ?

For slice of pizza:  

Q = 500 kcal

So,

50\times 1\times \Delta T=500  

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Increase in temperature = 10°C  

3 0
3 years ago
How many moles are in 1.2x10^3 grams of ammonia(NH3) ?
miskamm [114]

Answer : The number of moles present in ammonia is, 70.459 moles.

Solution : Given,

Mass of ammonia = 1.2\times 10^3g

Molar mass of ammonia = 17.031 g/mole

Formula used :

\text{Moles of }NH_3=\frac{\text{ given mass of }NH_3}{\text{ molar mass of }NH_3}

\text{Moles of }NH_3=\frac{1.2\times 10^3g}{17.031g/mole}=70.459moles

Therefore, the number of moles present in ammonia is, 70.459 moles.

5 0
3 years ago
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Using the diagram below, which rock layer is older than the Chinle Formation?
Klio2033 [76]

Answer:

moenkopi formation because layers further down are always older. think about it as a pile of laundry the clothes at the bottom of the pile were worn earlier in the week and are older and dirtier.

Explanation:

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Arun and Marcus are asked to compare the solubility of two salts in water at room temperature. The two salts are labelled X and
oksian1 [2.3K]

Answer:

1) Salts X and Y

2) The solubility of the salts

3) a) The solvent

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Explanation:

1) The independent variable is the variable that is suspected to be the cause of the subject of the investigation

The given investigation is meant to investigate the solubility of different salts

Therefore, the solubility is expected to be dependent on the type of salt, and the independent variable is the type of salt, X or Y

2) The dependent variable is the effect meant to be observed in the investigation, which is the solubility of the salt in water at room temperature

3) The control variables are the variables which are held constant during the investigation, including;

a) The solvent used if the investigation; water

b) The temperature of the solvent; Room temperature

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Answer:

the correct answer is A

Explanation:

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