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lina2011 [118]
2 years ago
9

Which of the following best captures the point of paragraph 3

Chemistry
1 answer:
givi [52]2 years ago
6 0

Answer:

Is there a picture or smth?

Explanation:

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Increase the force they are using to move the box by adding more helpers

Explanation:
If you want to increase the speed that the box is moving, increasing the friction would make it more difficult, decreasing the force they are using would just make it slower and increasing the angle of the ramp would make it harder. Adding more people would make it easier. “The more the merrier”
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Maria and Carla were hiking when Maria tripped, fell, and sprained her ankle. Carla took out the first-aid kit and unwrapped a c
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It is an endothermic reaction, the chemicals (probably water and ammonium nitrate) require more energy to react therefore it absorbs heat from it's surrounding to power the reaction and thus lowering the surrounding temperature. <span />
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Read 2 more answers
Which one IS an example of a homogenous mixture?
elena-s [515]

Answer:

<em>I</em><em> </em><em>think</em><em> option</em> ( b) <em>tea </em><em>is</em><em> right</em><em> answer</em>

8 0
3 years ago
A particular sample of fresh carrot is 79% free water. After drying the sample, the carrot’s new mass was 8 g. After burning the
Schach [20]

Answer:

17.85% is the organic content of the carrot tissue.

Explanation:

Percentage of water is carrot sample = 79%

Mass of the sample = M

Mass of the water is sample = 79% of M = 0.79M

Percentage of dried carrot sample = 100%-79%=21%

Mass of the carrot sample after drying = 8 g

21\%=\frac{8 g}{M}\times 100

M=38.10 g

Mass of ash =- 1.2 g

Mass of organic matter = 8 g - 1.2 g = 6.8 g

Percentage of organic matter ;

=\frac{6.8 g}{38.10 g}\times 100=17.85\%

17.85% is the organic content of the carrot tissue.

5 0
3 years ago
Which of the following statements is (are) incorrect?
Stells [14]

Answer:

1. A.

All statements are correct.

2.E

Explanation:

I. The hybridization of boron in BF3 is sp2

Hybridization is simply the mixing of orbitals to form new orbitals. In the above instance, one s orbital had mixed with 2 p orbitals.

Firstly, to get this hybridization, we draw the Lewis structure I.e using dots to represent the number of valence electrons on the atoms.

Boron has five valence electrons and hence it needs three more to complete an octet. This can be completed by sharing one electron from each of the fluorine atom.

Now, the hybridization is sp2 because a single pi bond is required for the double bond between the boron and only three sigma bonds are formed per boron atom.

II. The molecule XeF4 is non polar

It is non polar because it has no plane of symmetry.

III. The bond order of N2 is three.

Bond order is mathematically equal to = (number of electrons in the bonding orbital - number of electrons in the non bonding orbital)/2

The number of electrons in the bonding are 6 while the number of electrons in the nonbonding orbital is zero. Calculating this yields 6/2 = 3

IV. The molecule HCN has 2 pi bonds and 2 sigma bonds

2. Hybridization of I3- is sp3d

To know the number of hybrid bonds, we simply add the number of lone pairs with that of the neighbours and that's 3 + 2 = 5

Thus, the hybridization is sp3d

6 0
3 years ago
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