How many significate figures does 0.003010 have

2 answers:

8 0

Four 4. Each of the digits of a number that are used to express it to the required degree of accuracy, starting from the first nonzero digit is a significant figure.

guajiro [1.7K]4 years ago

4 0

The answer is C 4 3 4 3 hope it helps

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Calculate Delta n (change in moles of gaseous substances) for each of the following balanced chemical equations...

Lerok [7]

2C6H6O(l)+17O2−−>12CO2(g)+12H2O(l)
2SO2(g)+O2(g)−−>2SO3(g)
N2(g)+O2(g)−−>2NO(g)
2Na(s)+Br2(l)−−>2NaBr(s)
On the 1st 3 I have
12 -17 = -5
2 - 3 = -1
2 - 2 = 0
For the last one:
Delta n=0

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3 years ago

When an acid solution exactly neutralizes a base

o-na [289]

Answer:a weak acid and a weak base

Explanation:

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3 years ago

Ann and Jesse's mom is driving them to school. They are listening to music on an FM radio station. When they ride in the car wit

Svet_ta [14]

Answer: it they are both in the same place

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3 years ago

Milk of magnesia is often taken to reduce the discomfort associated with acid stomach or heartburn. The recommended dose is 1 te

Igoryamba

Answer:

8.61 mL of the HCl solution

Explanation:

The reaction that takes place is:

2HCl + Mg(OH)₂ → MgCl₂ + 2H₂O

From the given mass of Mg(OH)₂, we can calculate the moles of HCl that are neutralized:

4x10² mg = 400 mg = 0.400g

0.400g Mg(OH)₂ ÷ 58.32g/1mol = 6.859*10⁻³ mol Mg(OH)₂

6.859*10⁻³ mol Mg(OH)₂ * $\frac{1molHCl}{1molMg(OH)_{2}} =$ 3.429x10⁻³ mol HCl

Finally, to calculate the volume of an HCl solution, we need both the moles and the concentration. We can calculate the concentration using the pH value: