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3 years ago

12

In the formula CO2, what does the subscript 2 after the O mean

2 answers:

Soloha48 [4]3 years ago

7 0

2 oxygen atoms are being bonded with the carbon.

ozzi3 years ago

5 0

it means two oxygen atoms

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Balance the following redox equation in acidic solution using the smallest integers possible and select the correct coefficient

romanna [79]

Answer:

Coefficient of $H^{+}(aq)$ is more than 4

Explanation:

Oxidation: $Sn^{2+}(aq)\rightarrow Sn^{4+}(aq)$

Balance charge: $Sn^{2+}(aq)-2e^{-}\rightarrow Sn^{4+}(aq)$ ......(1)

Reduction: $Cr_{2}O_{7}^{2-}(aq)\rightarrow Cr^{3+}(aq)$

Balance Cr: $Cr_{2}O_{7}^{2-}(aq)\rightarrow 2Cr^{3+}(aq)$
Balance O and H in acidic medium: $Cr_{2}O_{7}^{2-}(aq)+14H^{+}(aq)\rightarrow 2Cr^{3+}(aq)+7H_{2}O(l)$
Balance charge: $Cr_{2}O_{7}^{2-}(aq)+14H^{+}(aq)+6e^{-}\rightarrow 2Cr^{3+}(aq)+7H_{2}O(l)$ .......(2)

$[3\times Equation-(1)]+Equation(2)$ gives balanced equation:

$3Sn^{2+}(aq)+Cr_{2}O_{7}^{2-}(aq)+14H^{+}(aq)\rightarrow 3Sn^{4+}(aq)+2Cr^{3+}(aq)+7H_{2}O(l)$

So coefficient of $H^{+}(aq)$ is more than 4

3 0

3 years ago

Minerals are very useful to us. Which of the following is a false statement?

Shtirlitz [24]

A. Pyrite is an ore of gold and is used to jewelry making is a false statement

4 0

3 years ago

Read 2 more answers

Please do these questions, will give brainliest

Nata [24]

Answer:

1.c 2.a.3.d 4.a

Explanation:

that is tge answer

3 0

2 years ago

Density, Mass, or Volume is a physical property of matter?

ohaa [14]

Density is a physical property of matter

4 0

3 years ago

An aircraft is taking a group of skydivers up into the air. Evan is dressed in

meriva

4,410 kJ

Explanation:

Gravitational Potential Enegry (GPE) is calculated as;

GPE = <em>m*g*h</em> where;

m = mass (kg)

g = gravity (m/s²)

h = height (meters)

= 90 * 9.8 * 5000

= 4,410,000‬ joules

= 4,410 kJ

7 0

3 years ago