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3 years ago

What is the chemical name of the compound Na2CO3? Use the list of polyatomic ions and the periodic table to help you answer.

Chemistry

2 answers:

m_a_m_a [10]3 years ago

5 0

Answer:

I believe the answer is B. Sodium carbonate

KonstantinChe [14]3 years ago

3 0

Answer : The correct option is, (B) Sodium carbonate

Explanation :

$Na_2CO_3$ It is an ionic compound because sodium element is a metal and carbonate ion is polyatomic ion. When the metal element combine with the polyatomic ion they form ionic compound.

$CO_3^{2-}$ = carbonate ion

While naming of ionic compounds, we write cation first then anion. Here anion is a polyatomic ion. So, the name of the compound is, sodium carbonate.

Hence, the correct option is, (B) Sodium carbonate

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Balance this equation: CH4 +2O2--------> ___ CO2 + ___ H2O

Lubov Fominskaja [6]

Answer:

b-1 CO2+ 2H2O

5 0

3 years ago

What does the 3 indicate in 1s22s22p63s1?

Dahasolnce [82]

The 3 indicates the third electron shell. (Which has only 1 electron in it in this configuration)

Hope this helps! :)

6 0

3 years ago

Read 2 more answers

Under standard-state conditions, which of the following half-reactions occurs at the cathode during the electrolysis of aqueous

Slav-nsk [51]

Answer:

The following reaction will occur at cathode:

$Ni^{+2}(aq)+2e--->Ni(s)$

Explanation:

The two half reaction during electrolysis of aqueous nickel sulfate will be

a) anode reaction :

Water will undergo oxidation and will evolve oxygen gas at anode as shown in the given reaction:

$2H_{2}O(l) ----> O_{2}(g) + 4H^{+}(aq) + 4e$

b) Cathode reaction: The reduction of Nickel ion will occur by gain of two electrons as shown in the given equation:

$Ni^{+2}(aq)+2e--->Ni(s)$

Thus the overall reaction will be:

$2H_{2}O(l) + 2Ni^{+2}----> O_{2}(g) + 4H^{+}(aq) + 2Ni(s)$

6 0

3 years ago

What is the missing value

Korvikt [17]

Answer:

Explanation:

The pattern here may be hard to find at first, but it's this: the number in the middle of the triangle = (number at lower left corner of triangle x number at upper vertex of triangle) + (number at upper vertex of triangle x number at lower right corner of triangle).

Thus, for the missing value...

Missing value = (3x8) + (8x6) = 24+48 = 72.

Could you tell me what concept in chemistry relates to this? I'm interested.

Also check out stylesben's answer. Seems like there's several ways of doing this.

7 0

3 years ago

Read 2 more answers

A weather balloon contains 1.10X10 to the power of 5 mol of helium and has a volume of 2.70x10 to the power of 6 L at 1.00 atm p

olchik [2.2K]

Answer:

299.14 K or 26°C

Explanation:

The ideal gas law, also called the general gas equation, is the equation of state of a hypothetical ideal gas.

The ideal gas law is often written as

PV = nRT

where P ,V and T are the pressure, volume and absolute temperature;

n is the number of moles of gas and R is the ideal gas constant.

n=1.10 x 10^5 mol

V= 2.70 x 10^6 L

P= 1.00 atm= 101.325 kPa

R= 8.314 kPa*L/ mol*K

when the formula is rearranged, T=PV/ nR

T = (101.325kPa * 2.70 x 10^6 L)/ (1.10 x 10^5 mol * 8.314 kPa*L/ mol*K)

T = 299.1421917 K

T = 299.14 - 273.15 = 25.99 = 26°C

4 0

3 years ago