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4 years ago

What is the formula units for sodium sulfide, sodium sulfite, anf sodium sulfate?

Chemistry

1 answer:

elena-14-01-66 [18.8K]4 years ago

3 0

Answer:

Look them up.

Explanation:

sulphate is SO4 (2-)

Sufide is S(-1)

Sulfite - look it up - there are several more right there you may need.

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The graph shows the changes in the phase of ice when it is heated which of the following temperatures describes the value of A

Hoochie [10]

Answer:

A will be much less than 0 degrees

Explanation:

See the graph

https://prnt.sc/10ahuzc

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3 years ago

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Which polynomials, given in square inches, could represent the area of a square with whole number side lengths if x is a whole n

erica [24]

Answer: The correct answers are $x^2-9\text{ and }x^2-100$

Explanation:

To find the polynomials which could represent the are of a square having side x greater than 2, we need to find the value of 'x' for all the given polynomials.

From the given options:

1. $x^2-9$

$x^2=9\\x=\sqrt{9}\\x=3,-3$

x = -3 is ignored.

2. $x^2-100$

$x^2=100\\x=\sqrt{100}\\x=\pm10\\x=10,-10$

x = -10 is ignored

3. $x^2-4x+4$

To solve this we use the quadratic formula:

$\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

Putting values of a, b and c, we get:

$x=\frac{-(-4)\pm\sqrt{(-4)^2-4(1)(4)}}{2\times 1}\\x=2,2$

As, x comes out to be 2 and is not greater than 2. Hence, this is not considered.

4. $x^2+10x+25$

Solving for 'x' by splitting the middle term:

$\Rightarrow x^2+5x+5x+25\\\Rightarrow x(x+5)+5(x+5)\\x=-5,-5$

Hence, this is ignored.

5. $x^2+15x+36$

Solving for 'x' by splitting the middle term:

$\Rightarrow x^2+12x+3x+36\\\Rightarrow x(x+12)+3(x+12)\\x=-12,-3$

Hence, this is ignored.

So, the correct polynomials are $x^2-9\text{ and }x^2-100$

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3 years ago

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IF CORRECT I WILL GIVE BRAINLIEST

Vilka [71]

I think it’s B
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3 years ago

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48:03

Iteru [2.4K]

The outer is the correct answer

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3 years ago

Predict the missing component of each reaction. ? + 2NaBr → 2NaC1+Brz онСІ ch Na

EastWind [94]

Answer:

Cl2.

Explanation:

? + 2NaBr → 2NaC1l+ Br2

Note that the element Cl (chlorine) is missing from the left side.

The answer is Cl2 (to balance the equation it requires 2 Cl's).

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3 years ago

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What is the formula units for sodium sulfide, sodium sulfite, anf sodium sulfate?​

What is the formula units for sodium sulfide, sodium sulfite, anf sodium sulfate?