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Rina8888 [55]
3 years ago
13

Energy is defined as...

Chemistry
1 answer:
Nana76 [90]3 years ago
3 0

Answer:

A

Explanation:

the ability to dissolve in water

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Which mineral property is the least reliable for identifying a mineral?
earnstyle [38]
The answer is color as the least reliable
8 0
3 years ago
Read 2 more answers
How many moles are in 60.0 grams of water?
Mashutka [201]
<h3>Answer:</h3>

3.33 mol H₂O

<h3>General Formulas and Concepts:</h3>

<u>Math</u>

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

<u>Chemistry</u>

<u>Atomic Structure</u>

  • Reading a Periodic Table
  • Using Dimensional Analysis
<h3>Explanation:</h3>

<u>Step 1: Define</u>

60.0 g H₂O (Water)

<u>Step 2: Identify Conversions</u>

Molar Mass of H - 1.01 g/mol

Molar Mass of O - 16.00 g/mol

Molar Mass of H₂O - 2(1.01) + 16.00 = 18.02 g/mol

<u>Step 3: Convert</u>

  1. Set up:                               \displaystyle 60.0 \ g \ H_2O(\frac{1 \ mol \ H_2O}{18.02 \ g \ H_2O})
  2. Multiply:                             \displaystyle 3.32963 \ mol \ H_2O

<u>Step 4: Convert</u>

<em>Follow sig fig rules and round. We are given 3 sig figs.</em>

3.32963 mol H₂O ≈ 3.33 mol H₂O

5 0
3 years ago
The US National Debt Clock showed the outstanding public debt to be $16,213,166,914,811 on October 28, 2012. How many stacks lik
Serggg [28]

Answer: 5.74×10^8 stacks

Explanation:

The U.S. quarter has a mass of 5.67 g and is approximately 1.55 mm thick.

1 stack would contain $2.83x 10^4

No. of stacks to pay off debt=

$16,213,166,914,811/2.83 ×10^4

= 5.74 × 10^8 stacks

6 0
4 years ago
The degree of polarity of diatomic molecules is directly related to the difference in _____.
Crank
The degree of polarity of diatomic molecule is related to the difference of electronegativity of the two atoms. If the difference is very large, i.e. one atom is highly electronegative and the other atom is highly electropostive then, the covalent bond is formed. But if the difference between the electronegativities is very less, then its likely that ionic bond is formed.
6 0
3 years ago
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You dissolve 8.65 grams of lead(II) nitrate in water, and then you add 2.50 grams of aluminum. This reaction occurs: 2Al(s) + 3P
Marysya12 [62]

Answer: A. 5.41

Explanation:

To calculate the moles :

\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}    

\text{Moles of} Al=\frac{2.50g}{27g/mol}=0.0926moles

\text{Moles of} Pb(NO_3)_2=\frac{8.65g}{331g/mol}=0.0261moles

2Al(s)+3Pb(NO_3)_2(aq)\rightarrow 3Pb(s)+2Al(NO_3)_3(aq)  

According to stoichiometry :

3 moles of Pb(NO_3)_2 require  = 2 moles of Al  

Thus 0.0261 moles of Pb(NO_3)_2 will require=\frac{2}{3}\times 0.0261=0.0174moles  of Al

Thus Pb(NO_3)_2 is the limiting reagent as it limits the formation of product and Al is the excess reagent.

As 3 moles of Pb(NO_3)_2 give = 3 moles of Pb

Thus 0.0261 moles of Pb(NO_3)_2 give =\frac{3}{3}\times 0.0261=0.0261 moles  of Pb

Mass of Pb=moles\times {\text {Molar mass}}=0.0261moles\times 207g/mol=5.41g

Thus 5.41 g of solid lead will be produced from the given masses of both reactants.

8 0
3 years ago
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