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Pani-rosa [81]
3 years ago
11

How many significant figures are in 5.40

Chemistry
1 answer:
kotykmax [81]3 years ago
4 0
There are 3 significant figures in this value, all values before and after the decimal point are significant. As there is a decimal point, the zeros trailing are also significant.
You might be interested in
what’s the chemical equation for production of potassium vapor and molten sodium chloride from molten potassium chloride and mol
elena-14-01-66 [18.8K]

Answer:

\huge\boxed{\sf KCl_{(aq)}+Na_{(aq)} \longrightarrow K_{(l)}+NaCl_{(aq)}}

Explanation:

<u>Chemical formulas for every compound:</u>

Potassium vapor => K_{(l)

Molten soldium chloride => NaCl_{(aq)}

Molten Potassium chloride => KCl_{(aq)}

Molten Sodium Metal => Na_{(aq)}

<u>The reaction will be as follows:</u>

KCl_{(aq)}+Na_{(aq)} \longrightarrow K_{(l)}+NaCl_{(aq)}

This reaction is usually called displacement reaction in which an element displaces another element of a compund.

\rule[225]{225}{2}

4 0
2 years ago
What are six forms of energy? Find an example of each.
Evgesh-ka [11]
1-Electric Energy
Example: A lightbulb is an example of electric energy
2-Sound Energy
Example: When a dog barks, that is sound energy
3-Solar Energy
Example: When we use the sun for energy. Like using it to dry our clothes.
4-Chemical Energy
Example: An example is a battery. That may not seem like it, but it is Chemical Energy.
5-Nuclear Energy
Example: A fission reaction at a nuclear powerplant
6-Thermal Energy
Example: A pot of water boiling on an Electric Stove
~Silver
4 0
3 years ago
An individual picks up a cup and drinks from it. This is an example of __________.
Lesechka [4]

Answer:

A

Explanation:

The correct answer is: A) "A concentric contraction because muscles cause the elbow joint and arm to move"

6 0
3 years ago
Read 2 more answers
What is a reaction rate?
kondaur [170]

Answer:

A reaction rate is a measure of how fast a reactant disappears or a product forms during a reaction.

Explanation:

It is usually defined as the change in concentration per unit time:

Δ(concentration)/Δt

The units are (moles per litre) per second.

In symbols, the units are mol/(L·s) or mol·L^-1 s^-1.

7 0
4 years ago
Lead has a density of 11.3 g/mL. If you have 105 grams of lead,
Elza [17]

Answer:

<h2>Volume = 9.29 mL</h2>

Explanation:

Density of a substance can be found by using the formula

Density( \rho) =  \frac{mass}{volume}

From the question

Density = 11.3 g/mL

mass = 105 g

Substitute the values into the above formula and solve for the volume

That's

11.3 =  \frac{105}{v}

Cross multiply

11.3v = 105

Divide both sides by 11.3

v =  \frac{105}{11.3}

v = 9.29203

We have the final answer as

<h3>Volume = 9.29 mL</h3>

Hope this helps you

6 0
3 years ago
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