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3 years ago

8 ( 3b + 3 ) = 5b + 5

1 answer:

4 0

You first distribute 8 through the parenthesis so it’s 24b+24=5b+5
Then collect the like terms to calculate 24b-5b=5-24 you then subtract so now it’s 19b=-9
So now you divide and your answer is b=-1

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mafiozo [28]

The answer is “Impulse acting on it” according to the impulse-momentum theorem.

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3 years ago

Consider the following thermochemical equation:

Arisa [49]

Answer:

$m_w=5.3248\times 10^{23}\ kg$

Explanation:

According to the given reaction,

heat released by thecombustion of 2 molecules of Methanol, $\Delta H=1277000\ J$

we know that molecular mass of Methanol, $m=32\ g.mol^{-1}$

∴12 gram of methanol = $\frac{3}{8}\ moles$

we know 1 mole = $6.023\times 10^{23}\ molecules$

so,

$\rm \frac{3}{8} \ moles=2.258\times 10^{23}\ molecules$

Heat from the combustion of $2.258\times 10^{23}\ molecules$ :

$Q=1277000\times \frac{2.258\times 10^{23}}{2}$

$Q=1442132.0625\times 10^{23}\ J$

<u>Now the mass of water that can be heated from 23.5°C to 88.2°C :</u>

$Q=m_w.c_w.\Delta T$

$1442132.0625\times 10^{23}=m_w.4186\times (88.2-23.5)$

$m_w=5.3248\times 10^{23}\ kg$

8 0

3 years ago

11) Which statement about covalent bonds is true? A) Covalent bonds are generally weaker than ionic bonds because they form full

Cerrena [4.2K]

<h3><u>Answer;</u></h3>

C) Covalent bonds are generally weaker than ionic bonds because they overlap electrons to fill their outer shell.

<h3><u>Explanation;</u></h3>

<em><u>Covalent bond is a type of bond that results from the sharing of electrons between two non-metal atoms. </u></em>
<em><u>Ionic bond on the other is a type of bond that results from the transfer of electrons between metal atoms and non metal atoms, where a metal atom looses electrons and a non-metal atom gains electrons.</u></em>
<em><u>The amount of energy required to break an given bond determines how strong a particular bond is.</u></em> Ionic bonds require more energy to break as compared to covalent bond and therefore they are stronger than the covalent bonds.

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3 years ago

Read 2 more answers

Suppose a Heel-mobile, moving in a straight line and steadily increases its speed. It moves from 15 m/s to 30 m/s the first seco

Makovka662 [10]

acceleration = change in velocity/change in time = 45-15 / 2

=30/2 = 15 m/s

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3 years ago

If the strength of the magnetic field at A is 200 units and the strength of the magnetic field at B is 50 units, what is the dis

Whitepunk [10]

A is the answer!!!!!!!!!!!!!!!!!!

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3 years ago