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amm1812
3 years ago
9

Any suggestions or answers

Chemistry
1 answer:
leva [86]3 years ago
6 0

Explanation: energy levels are three(counting number of cyecles) outer electrons are 3 also

Answer:3,3

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a solution of prepared by dissolving 20.0 brams of mavni fluride (MgF2) in 80.0 of water (H2O). whag is the mole fraction of mag
Serjik [45]

Answer:

2000.1234 trebuie sa fie asa

3 0
3 years ago
How many moles of sodium cyanide (NaCN) would be needed to produce 4.2 moles of sodium sulfate (Na2SO4)? H2SO4 + 2NaCN → 2HCN +
leonid [27]
The purpose of a chemical equation is to relate the amounts of reactants to the amounts of products based on the rate each is consumed. In this problem, one mole of sulfuric acid is consumed along with two moles of sodium cyanide to produce two moles of hydrocyanic acid and one mole of sodium sulfate. The relationship between sodium cyanide and sodium sulfate is 2:1, meaning that two moles of NaCN is required to produce one mole of sodium sulfate.

To produce 4.2 moles of sodium sulfate, two times this amount of NaCN is required. This means that you would need 8.4 moles of sodium cyanide.

Hope this helps!
4 0
3 years ago
Read 2 more answers
A man pours some hot coffee into a small cup from a large jug that contains enough coffee for several cups. Which statement corr
Stells [14]

Answer:

The correct answer is "The coffee in the jug has more thermal energy than the coffee in the cup".

Explanation:

First I had to look for the problem to know the possible answers.

In this case, the coffee jug has a large amount of coffee at the same temperature. If we analyze that the decanter and the coffee are at the same temperature, we have a homogeneous thermal system. The cup is at room temperature, so by pouring coffee into it, the temperature of the coffee decreases to balance with the temperature of the cup. At this moment, the temperature of the cup-cafe system is lower than the jug-cafe system.

Thermal energy is the part of the internal energy of an equilibrated thermodynamic system that is proportional to its absolute temperature and increases or decreases by energy transfer.

In this way, we can ensure that the thermal energy of the cup-cafe system is lower than that of the jug-cafe system.

Have a nice day!

3 0
3 years ago
Indicator paper can be used to measure the _________________ of a solution. indicators are substances that are different _______
Ede4ka [16]

sorry, but im just learning some chemistry myself so i only know that the 1st blank is: Ph

hope you can find what the other 2 blanks are

3 0
3 years ago
researcher measures the mass of a sample to be 5.51 g. The actual mass of the sample is known to be 5.80g. Calculate the percent
Serga [27]

Answer:

5% is the percent error

Explanation:

Percent error is defined as the 100 times the ratio of absolute value of the difference between the measurement and the theoretical value and the theoretical value, that is:

\frac{|Theoretical-Measurement|}{Theoretical} * 100

In the problem, theoretical value is 5.80g and the measurement is 5.51g:

\frac{|5.80g-5.51g|}{5.80g} * 100

% =

<h3>5% is the percent error</h3>
8 0
3 years ago
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