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Kisachek [45]
3 years ago
11

What is the symbol of the element in group 4a 14 and period 2?

Chemistry
1 answer:
asambeis [7]3 years ago
6 0
The fourth group of the periodic table contains the elements from the carbon family. The element in the first period of the group is carbon, with atomic number 6. Then, in the second period, the element present is silicon, which is the one under consideration.

The symbol of silicon is:

²⁸Si₁₄
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Vera_Pavlovna [14]

Answer:

fdfdgiukjgrguhjnfvthhhdqddwsvhjjj

4 0
2 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
When methane ( CH4 ) burns, it reacts with oxygen gas to produce carbon dioxide and water. The unbalanced equation for this reac
slega [8]
<h2>Answer:</h2>1.33*10^{-2}grams

<h2>Explanations</h2>

The complete balanced equation for the given reaction is expressed as;

CH_4(g)+2O_2(g)\rightarrow CO_2(g)+2H_2O(g)

Given the following parameters

Mass of CH4 = 5.90×10^−3 g = 0.0059grams

Determine the moles of methane

\begin{gathered} moles\text{ of CH}_4=\frac{mass}{molar\text{ mass}} \\ moles\text{ of CH}_4=\frac{0.0059}{16.04} \\ moles\text{ of CH}_4=0.000368moles \end{gathered}

According to stoichimetry, 1 mole of methane produces 2 moles of water, hence the moles of water required will be:

\begin{gathered} moles\text{ of H}_2O=\frac{2}{1}\times0.000368 \\ moles\text{ of H}_2O=0.000736moles \end{gathered}

Determine the mass of water produced

\begin{gathered} Mass\text{ of H}_2O=moles\times molar\text{ mass} \\ Mass\text{ of H}_2O=0.000736\times18.02 \\ Mass\text{ of H}_2O=0.0133grams=1.33\times10^{-2}grams \end{gathered}

Therefore the mass of water produced from the complete combustion of 5.90×10−3 g of methane is 1.33 * 10^-2grams

5 0
1 year ago
Please anyone answer this question
Ainat [17]

Answer:

A, 18.4 and 34!

Explanation:

The Burette seems to have <em><u>~18.4</u></em> of the liquid? substance in it, and the Measuring Cylinder seems to have <em><u>~34</u></em> of the liquid? substance in it. <em><u>So, it is A!</u></em> :]

Hope this helps!!

7 0
2 years ago
When a group 1 element and a group 16 element bond, the subscripts in the formula will always be?
zloy xaker [14]

Answer:

A.  

X2Y2

Explanation:

4 0
3 years ago
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