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3 years ago

5

If your mixing cement for the foundation of a building and it calls for 1.55 tons of sand, how many grams of a sand are you usin

g? Please show your work, and report your answer with the correct number of significant figures and appropriate units.

1 answer:

Damm [24]3 years ago

6 0

Answer:

1406136 grams

Explanation:

You might be interested in

How can I balance this equation? TELL ME HOW you did it and all the steps and you will be the brainliest.

lianna [129]

Answer:

3 CH3CH2OH + 4 H2CrO4 + 6 H2SO4 --> 3 CH3COOH + 2 Cr2(SO4)3 + 13 H2O

Explanation:

To balance, start of with the groups that are common on both sides of the reaction equation;

In this case, these are the SO4 groups treating them as single units;

There are 3 on the right side and 1 on the left side, so we put 3 in front of the H2SO4 to balance this first;

Next, deal with the Cr, there are 2 Cr on the right side and 1 on the other side, so we put a 2 in front of the H2CrO4 to balance that;

Thirdly, we notice the C are already balanced as there are 2 on each side so this is fine;

Lastly, we can deal with the O and H;

Bearing in mind the numbers that are in front of the molecules now from prior balancing, there are 9 O and 16 H on the left side and 3 O and 5 H on the right;

7 H2O on the right side would balance the O, but gives us 18 H, which is 2 too many H;

If we were to put 2 in front of the two organic molecules (the ones with C) on either side, we would balance the O by having 6 H2O, but this gives 2 fewer H than necessary;

In order for the H to balance, we need to have 13/2 (or 6.5) H2O, which means we need 3/2 (or 1.5) in front of each organic molecule;

Since, it is not sensible to have 13/2 water molecules or 3/2 organic molecules, we can just multiply everything by 2;

Thus we end up with:

3 CH3CH2OH + 4 H2CrO4 + 6 H2SO4 --> 3 CH3COOH + 2 Cr2(SO4)3 + 13 H2O

Rules of thumb:

- When there are common chemical groups (e.g. SO4) on both sides of a reaction equation, treat them as single units

- Start of with balancing these common groups

- Thereafter, balance the atoms that appear in only one reactant and one product

- Proceed to balance the atoms that appear in more than one reactant or product

- Typically, you should deal with the O and H last

4 0

3 years ago

What is the oxidation state of S in so ??

Marina86 [1]

Answer:

+2

Explanation:

If a compound $SO$ existed, we would identify the oxidation state of sulfur using the following logic:

oxygen is more electronegative than sulfur, so it's more electron-withdrawing and it should have a negative oxidation state producing a positive oxidation state for sulfur;
oxygen typically has an oxidation state of -2;
we may then apply the fact that SO is expected to be a molecule with a net charge of 0;
if the net charge is 0 and the oxidation state of oxygen is -2, we may set the oxidation state of S to x;
write the equation for the net charge of 0 by adding all individual charges of the two atoms: $x + (-2) = 0$ ;
hence, x = 2.

That said, in this hypothetical compound S would have an oxidation state of +2.

6 0

3 years ago

<img src="https://tex.z-dn.net/?f=%E2%96%AA%E2%96%AA%E2%96%AA%E2%96%AA%E2%96%AA%E2%96%AA%E2%96%AA%E2%96%AA%E2%96%AA%E2%96%AA%E2%

Elan Coil [88]

Let's check Electronic configuration of N in ground state

$\\ \sf\longmapsto 1s^22s^22p^3$

In exited state

$\\ \sf\longmapsto 1s^22s^22px^12py^12pz^2$

3 p orbitals

In hydrogen case

$\\ \sf\longmapsto 1s^1$

1 s orbital

Hence Hybridization

$\\ \sf\longmapsto s-p-p-p$

$\\ \sf\longmapsto sp^3$

Structure is tetrahedral .

Spare way:-

Bond pairs==3=>Bonding electrons=6
Lone pair=1=>Anti bonding electrons=2

Hybridization

$\\ \sf\longmapsto \dfrac{1}{2}[\sigma+\sigma *]$

$\\ \sf\longmapsto \dfrac{1}{2}[6+2]$

$\\ \sf\longmapsto \dfrac{1}{2}[8]$

$\\ \sf\longmapsto 4$

sp3 Hybridization
Shape-Tetrahedral .

6 0

2 years ago

Which of the following is true of the figures below?

DedPeter [7]

I believe the answer is B

8 0

2 years ago

Read 2 more answers

a demonstration of pressure could be done best with which of the following? A. a plastic and a pump B. ice in a glass and a ther

Vera_Pavlovna [14]

<span>The answer is A. The pump and the plastic are the only ones that create pressure compared to the other choices. When you exert a force on the pump to a closed object such as plastic, the pressure inside the pump that it gives off makes the plastic full of air. Pressure is defined to be the force per unit area or the stress within a fluid. </span>

6 0

3 years ago