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IgorLugansk [536]
3 years ago
12

2. A(n)

Chemistry
2 answers:
Korolek [52]3 years ago
8 0

Answer:

Compound is made of two or more than two elements in a fix ratio by mass. Compounds have different properties from the parent elements.

Explanation:

The chemical and physical properties of compound are different from the parent materials because it is produced from the chemical combination of elements. In chemical combination, bonds are formed and new substance is produced which is quite different from the parent substances. For example, CO2 is produced when carbon and oxygen react with each other. The properties of CO2 are different from carbon and oxygen.

DIA [1.3K]3 years ago
4 0

Answer: A compound

Explanation: A compound is a substance which contains two or elements chemically combined together.

The properties of a compound are different from the properties of the individual elements. For example, water H2O which is made up of hydrogen and oxygen atoms has properties different from the individual properties of hydrogen and oxygen.

Also, water is a compound made up of hydrogen and oxygen atoms which are combined in the ratio is 2 hydrogen atoms to 1 oxygen atom.

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This pendulum is suspended on a string. The balanced forces of gravity and the tension force within the string are holding the p
GuDViN [60]

Answer:

The pendulum will begin to swing in the direction of the unbalanced force

Explanation:

The action of an unbalanced force on a pendulum will cause the pendulum to go into oscillation.

It must be stated that an unbalanced force causes acceleration of an object, in the direction of that force. Hence, unbalanced forces always set an object in motion.

5 0
4 years ago
How many moles of sulfuric acid (H2SO4) are needed to react completely with 6.8 moles of lithium hydroxide (LiOH)? (4 points) 2L
Keith_Richards [23]

Answer:

3.4 mol H2SO4

Explanation:

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3 0
3 years ago
Which element among elements 2, 4, and 6 has the lowest ionization energy?
morpeh [17]
Element 6 has the lowest ionization energy
8 0
3 years ago
Read 2 more answers
QUESTION 5
Elenna [48]

B. 3.77 L is the new volume occupied by the gas.

<u>Explanation:</u>

As per Avogadro's law, which states that if the pressure and temperature held constant, then an equal volume of the gases will occupy an equal number of molecules. It can be written as,

$\frac{V1}{n1} = \frac{V2}{n2}\\

Here, V1, volume of the helium gas = 2.9 L

V2, volume of the additional helium gas in the balloon = ?

n1, moles of helium gas = 0.150 mol

n2, number of moles of additional helium gas = 0.150 + 0.0450 = 0.195 mol

We have to rearrange the equation for V2 as,

V2 = $\frac{V1n2}{n1}

Now Plugin the values as,

V2 = $\frac{2.9 L \times 0.195 mol}{0.150 mol}

  = 3.77 L

So the new volume of the balloon is 3.77 L.

6 0
3 years ago
A compound contains 75% carbon and 25% hydrogen by mass. what is the empirical formula for this compound?
Lady bird [3.3K]
These percentages are most likely mass percentages. Therefore, determine the mass of each element in 100g of the compound. 

<span>75g C, 25g H. </span>

<span>Divide these masses by their molar mass to find the ratios of the moles of element in the compound. Divide these values by the smallest of the two/three to get the ratios. </span>

<span>6.25:25 C:H --> 1:4 </span>


<span>So the formulae are CH4 (methane).</span>
4 0
3 years ago
Read 2 more answers
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