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Elden [556K]
3 years ago
14

An irregular object with a mass of 18.00 kg displaces 2.50 L of water when placed in a large overflow container. Calculate the d

ensity of the object.
Chemistry
1 answer:
kolezko [41]3 years ago
7 0

Answer:

7.20 kg/L

Explanation:

Density is mass (kg) / volume (L).

18.00kg/2.50L = 7.20 kg/L

If you need it in g/mL this is the equation:

\frac{7.20kg}{L} *\frac{1000g}{1kg} *\frac{1L}{1000mL} = 7.20g/mL

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(CH3)2N2H2 + N2O4 → N2 + H2O + CO2 + heat [balance?]​
Rasek [7]
<h3>Answer:</h3>

2(CH3)2N2H2 + 3N2O4 → 4N2 + 4H2O + 4CO2 + heat

<h3>Explanation:</h3>
  • Balancing chemical equations involves putting coefficients on reactants and products.
  • This results in an equal number of atoms of each element on either side of the equation.
  • Balancing chemical equations ensures that the law of conservation of mass is obeyed.
  • According to the law of conservation of mass, the mass of the reactants should be equal to the mass of products which is done by balancing chemical equations.
  • Putting the coefficients, 2, 3, 4, 4, 4 on the equation makes the equation balanced.
  • Therefore, the balanced equation would be;

       2(CH3)2N2H2 + 3N2O4 → 4N2 + 4H2O + 4CO2 + heat

7 0
3 years ago
H​2 ​​ and O2 ​​ react to produce H​2O. What is the mass of H2​​O produced when 0.73 g of H​2 ​​ completely reacts with 3.28 g o
Slav-nsk [51]
Hydrogen reacts with oxygen based on the following equation:
2 H2<span> + O</span>2<span> → 2 H</span>2<span>O
</span>
From the periodic table:
molar mass of hydrogen = 1 gram
molar mass of oxygen = 16 grams

From the balanced equation above, we can find that:
4 grams of hydrogen react with 32 grams of oxygen to produce 36 grams of water.

This means that: 0.73 grams of hydrogen require (0.73x32) / 4 = 5.84 grams of oxygen to react with.
Since only 3.28 grams of oxygen are reacting, this means that oxygen is our limiting reagent and that the reaction would stop once the amount of oxygen is consumed.

So, we will base our calculations on oxygen.
mass of water produced from 3.28 grams of oxygen can be calculated as follows:
mass of water = (3.28 x 36) / 32 = 3.69 grams
4 0
3 years ago
Construct a three-step synthesis of 3-bromo-3-methyl-2-butanol from 2-methyl-2-butene by dragging the appropriate formulas into
juin [17]

Answer:

See explanation

Explanation:

In order to do this, we need to use 3 reagents to get the final product.

The first one, and logic is the halogenation of the alkene. Doing this, with Br2/CCl4, we'll get an alkane with two bromines, one in carbon 2 and the other in carbon 3.

Then, the next step is to eliminate one bromine of the reactant. The best way to do this, is using sodium ethoxide in ethanol. This is because sodium ethoxide is a relatively strong base, and it will promove the product of elimination in major proportions rather than the sustitution product. If we use NaOH is a really strong base, and it will form another product.

When the sodium ethoxide react, it will form a double bond between carbon 1 and 2 (The carbon where one bromine was with the methyl, changes priority and it's now carbon 3).

The final step, is now use acid medium, such H3O+/H2O or H2SO4/H2O. You can use any of them. This will form an carbocation in carbon 2 (it's a secondary carbocation, so it's more stable that in carbon 1), and then, the water molecule will add to this carbon to form the alcohol.

See the attached picture for the mechanism of this.

4 0
3 years ago
What is an enzyme? Please help.
poizon [28]
An enzyme is a catalyst that helps speed up a chemical reaction.
8 0
3 years ago
Read 2 more answers
What does it mean if a solution is a "weak acid "? Strong acid? Give logical ph values for each
galina1969 [7]

Answer:

A weak acid is an acid that partially dissociates into its ions in an aqueous solution or water. In contrast, a strong acid fully dissociates into its ions in water. At the same concentration, weak acids have a higher pH value than strong acids.

Explanation:

:)

5 0
3 years ago
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