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svet-max [94.6K]
2 years ago
13

What is the rule for elements with two letters in the symbol?

Chemistry
2 answers:
Sergio039 [100]2 years ago
5 0
First letter is capital and second is lower case
Mumz [18]2 years ago
4 0

Answer:

In these two-letter symbols, the first letter is always capitalized and the second is always lowercased.

You might be interested in
How do modern periodic table arranged
pychu [463]
In the modern periodic table, the elements are arranged according to their atomic number - not their relative atomic mass.



In the periodic table the elements are arranged into:

rows, called periods, in order of increasing atomic number
vertical columns, called groups, where the elements have similar properties

4 0
3 years ago
How is the atomic mass of an element calculated?
zloy xaker [14]

Answer:

Mass number (A) is the number of nucleons (proton and neutron) present in a atom.

Explanation:

electrons don't cout since they are thousandth's of the mass of protons or neutrons

6 0
3 years ago
Can someone please help me please dont scroll
Nostrana [21]
Quantitative is anything that is relating to a number value. Think “quantity”

Example:

1. There are 5 ml of water
2. There are 3 beakers
3. It takes 30 minutes for the reaction

Qualitative is about characteristics that can be described

Example

1. The liquid is green
2. The solution turned into a gas
3. Bubbles were produced
4 0
2 years ago
When 28.0 g of acetylene reacts with hydrogen, 24.5 g of ethane is produced. What is the percent yield of C2H6 for the reaction?
Afina-wow [57]

Answer:

Y=75.6\%

Explanation:

Hello.

In this case, since no information about the reacting hydrogen is given, we can assume that it completely react with the 28.0 g of acetylene to yield ethane. In such a way, via the 1:1 mole ratio between acetylene (molar mass = 26 g/mol) and ethane (molar mass = 30 g/mol), we compute the yielded grams, or the theoretical yield of ethane as shown below:

m_{C_2H_6}^{theoretical}=28.0gC_2H_2*\frac{1molC_2H_2}{26gC_2H_2}*\frac{1molC_2H_6}{1molC_2H_2}  *\frac{30gC_2H_6}{1molC_2H_6}\\ \\m_{C_2H_6}^{theoretical}=32.3gC_2H_6

Hence, by knowing that the percent yield is computed via the actual yield (24.5 g) over the theoretical yield, we obtain:

Y=\frac{24.5g}{32.3g}*100\%\\ \\Y=75.6\%

Best regards.

3 0
3 years ago
25g of gold with initially 27grade centigrade what is the final temperature uppon absorbing 2.3kj of heat
dezoksy [38]

The final temperature of the mass of gold is  737 °C.

<h3>What is the specific heat capacity of gold?</h3>

The specific heat capacity of gold is 0.126 J/g/K

The final temperature, T2 of the gold is calculated as follows:

T2 = T + Q/mc

where;

T is initial temperature, m is mass, and c is specific heat capacity of gold.

T2 = 27 + 2.3 x 1000/(25 x 0.126)

T2 = 737 °C

Therefore, the mass and heat capacity of gold determines its final temperature.

Learn more about specific heat capacity at: brainly.com/question/27862577

#SPJ1

7 0
2 years ago
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