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2 years ago

12

If liquid nitrogen is poured over a balloon, what will happen to the volume of the balloon? Use

2 answers:

Kobotan [32]2 years ago

7 0

Answer:

The balloon will instanly freeze and "shatter" :)

Explanation:

The volume of a gas will shrink if its temperature decreases. The cold liquid nitrogen cools the air inside the balloon. As a result the molecules of air slow down causing the volume of the balloon to decrease. :)

Have an amazing day!!

Please rate and mark brainliest!!

mote1985 [20]2 years ago

6 0

1 When cooled by liquid nitrogen, the balloon shrinks (not as much as the air-filled balloon) and it sinks down on the table.

reason the volume of a gas will shrink if its temperature decreases

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Express the following numbers in scientific notation:

uranmaximum [27]

Answer :

(a) The number in scientific notation is, $6.0200\times 10^4L$

(b) The number in scientific notation is, $4.520\times 10^3J$

(c) The number in scientific notation is, $6.00\times 10^{-3}mg$

(d) The number in scientific notation is, $1.023\times 10^{-2}km$

(e) The number in scientific notation is, $8.070\times 10^1mL$

Explanation :

Scientific notation : It is the representation of expressing the numbers that are too big or too small and are represented in the decimal form with one digit before the decimal point times 10 raise to the power.

For example :

5000 is written as $5.0\times 10^3$

889.9 is written as $8.899\times 10^{-2}$

In this examples, 5000 and 889.9 are written in the standard notation and $5.0\times 10^3$ and $8.899\times 10^{-2}$ are written in the scientific notation.

$8.89\times 10^{-2}$ this is written in the scientific notation and the standard notation of this number will be, 0.00889.

If the decimal is shifting to right side, the power of 10 is negative and if the decimal is shifting to left side, the power of 10 is positive.

(a) As we are given the 60200 L in standard notation.

Now converting this into scientific notation, we get:

$\Rightarrow 60200L=6.0200\times 10^4L$

As, the decimal point is shifting to left side, thus the power of 10 is positive.

Hence, the correct answer is, $6.0200\times 10^4L$

(b) As we are given the 4520 J in standard notation.

Now converting this into scientific notation, we get:

$\Rightarrow 4520J=4.520\times 10^3J$

As, the decimal point is shifting to left side, thus the power of 10 is positive.

Hence, the correct answer is, $4.520\times 10^3J$

(c) As we are given the 0.00600 mg in standard notation.

Now converting this into scientific notation, we get:

$\Rightarrow 0.00600mg=6.00\times 10^{-3}mg$

As, the decimal point is shifting to right side, thus the power of 10 is negative.

Hence, the correct answer is, $6.00\times 10^{-3}mg$

(d) As we are given the 0.01023 km in standard notation.

Now converting this into scientific notation, we get:

$\Rightarrow 0.01023km=1.023\times 10^{-2}km$

As, the decimal point is shifting to right side, thus the power of 10 is negative.

Hence, the correct answer is, $1.023\times 10^{-2}km$

(e) As we are given the 80.70 mL in standard notation.

Now converting this into scientific notation, we get:

$\Rightarrow 80.70mL=8.070\times 10^1mL$

As, the decimal point is shifting to left side, thus the power of 10 is positive.

Hence, the correct answer is, $8.070\times 10^1mL$

5 0

3 years ago

What is the easiest way to explain molecular compounds and covalent bonds also adding information about valance electrons?

wlad13 [49]

Answer:

Molecular compounds consist of two or more nonmetals. The nonmetals that make up a molecular compound are held together by covalent/molecular bonds. Covalent bonds is known as the "sharing" of valence electrons between two or more chemical species. Valence electrons are shared so that the atoms of the compound can become stable, much like how ionic bonds transfer valence electrons between atoms to achieve stability.

5 0

3 years ago

Plz. 50 points and brainliest

Fittoniya [83]

Answer:

Concentration of solution B is

Explanation:

Solution A: Total volume of solution A = (9.00+1.00) mL = 10.00 mL

According to law of dilution,

where and are initial and final concentration respectively. and are initial and final volume respectively.

Here = , = 1.00 mL, = 10.00 mL

So, =

So, concentration of solution A =

Solution B: Total volume of solution B = (2.00+8.00) mL = 10.00 mL

Similarly as above, =

So, concentration of solution B =

Explanation:

Hope this helps:)

3 0

3 years ago

Read 2 more answers

Magnesium burns in air with a dazzling brilliance to produce magnesium oxide: 2 Mg(s) + O2(g) → 2 MgO(s) How many moles of O2 ar

TEA [102]

Answer:

1.05 mols of O2 gas

Explanation:

For this type of problem, it's important to understand what the balanced Chemical equation tells us:

<h3><u>Balanced Chemical equations</u></h3>

Let's look at the balanced chemical equation:

$2Mg(s)+O_2(g)-- > 2MgO(s)$

This equation two sides of the reaction arrow. On the left are the reactants (things you start with, and that react during the chemical reaction), and on the right side are products (things that are produced during the chemical reaction that you end with).

The numbers in front of each compound tell how many of molecules are involved for a full reaction without anything left over. A "mol" is a large quantity ( $6.022*10^{23}$ ), in this case, of molecules , since it's unlikely you're only taking a single molecule of each substance (it would be so tiny, you wouldn't even know you were doing the reaction).

So,for every 2 moles of Magnesium used, we'll also need 1 mole of Oxygen, and it will produce 2 moles of Magnesium Oxide.

In a way, during the reaction it's almost like 2 moles of Magnesium is equal to 1 mole of Oxygen and is equal to 2 moles of Magnesium Oxide:

$2 mol Mg(s)=1mol O_2(g)=2molMgO(s)$

From here, we can build some unit ratios, to convert between the known quantity of moles we have, and find the unknown quantity of moles that are requested.

<h3><u>Finding the right unit ratio</u></h3>

We know that we are looking at 2.10 mol of Magnesium, so we want a unit ratio with moles of Mg on the bottom. <u>We want to find moles of O2</u>, <u>so we want a unit ratio of moles of O2 on top</u>.

The unit ratio we want is the middle part of the equation, divided by the left part of the equation.

$2 mol Mg(s)=1mol O_2(g)\\\frac{2 mol Mg(s)}{2 mol Mg(s)}=\frac{1mol O_2(g)}{2 mol Mg(s)}\\1=\frac{1mol O_2(g)}{2 mol Mg(s)}$

Since this quantity is 1, it is a unit ratio and can be multiplied to other things to change their units (for this problem).

<h3><u>Finding the answer</u></h3>

Starting with what we know, and multiplying by our unit ratio:

$2.10 mol Mg(s)*\frac{1mol O_2(g)}{2 mol Mg(s)}=1.05mol O_2(g)$

Notice that the units from the first quantity cancel with the units on the bottom of the fraction, leaving only the unit on top of the fraction ... the exact units we wanted!

So, 1.05mols of O2 would be consumed during the reaction if exactly 2.10moles of Magnesium are burned.

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2 years ago

Foliated rocks are distinguished by ____.

kenny6666 [7]

Foliated rocks are distinguished by layers, banding, or flakiness. Foliated rocks are given names depending their mineralogy and texture. These names can be slate, Phyllite and Schist. These rocks are formed within the Earth's interior under extremely high pressures that are unequal.

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3 years ago

Read 2 more answers