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kondor19780726 [428]
3 years ago
5

Assuming that each cubic centimeter of water has a mass of exactly 1 g, find the mass of 1.27 cubic meter of water.

Chemistry
1 answer:
iren [92.7K]3 years ago
7 0

Answer:

1270g or 1.27kg

Explanation:

This is a case of conversions. Firstly, we will need to know the amount or number of cubic centimeters in one cubic meter. By conversion, we have 1000 of such.

This practically means before we could form one cubic meter of water, 1000 units of water having a volume of one cubic centimeter each would have come together.

Now, we know that one cubic centimeter has a mass of 1g, this means 1000 cubic centimeter would have a mass of 1000 * 1 = 1000g or 1kg

Hence 1.27 cubic meter of water will thus have a mass of 1.27 * 1000g = 1270g or simply 1.27kg

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Your Answer Will Be Intensive Property
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4 NH3(g) + 5O2(g) → 4NO(g) + 6H2O(g)
Mariulka [41]

Answer:

0.9 moles of water

Explanation:

Use mole ratios:

5 : 6

divide by 5 on both sides

1 : 1.2

multiply by 0.75 on both sides

0.75 : 0.9

So the result is 0.9 moles of water

(Please correct me if I'm wrong)

5 0
2 years ago
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6 0
3 years ago
How many moles are in 7.2x10^15 atoms of Pb?​
fiasKO [112]
<h3>Answer:</h3>

1.2 × 10⁻⁸ mol Pb

<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> </u>

<u>Chemistry</u>

<u>Atomic Structure</u>

  • Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

<u>Stoichiometry</u>

  • Using Dimensional Analysis
<h3>Explanation:</h3>

<u>Step 1: Define</u>

[Given] 7.2 × 10¹⁵ atoms Pb

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

Avogadro's Number

<u>Step 3: Convert</u>

  1. [DA] Set up:                                                                                                     \displaystyle 7.2 \cdot 10^{15} \ atoms \ Pb(\frac{1 \ mol \ Pb}{6.022 \cdot 10^{23} \ atoms \ Pb})
  2. [DA] Multiply/Divide [Cancel out units]:                                                            \displaystyle 1.19562 \cdot 10^{-8} \ mol \ Pb

<u>Step 4: Check</u>

<em>Follow sig fig rules and round. We are given 2 sig figs.</em>

1.19562 × 10⁻⁸ mol Pb ≈ 1.2 × 10⁻⁸ mol Pb

6 0
2 years ago
A sound wave has a wavelength of 0.7 miles and a frequency of 500 Hertz what is the speed
yaroslaw [1]

speed equals wavelength times frequency so

.7 x 500 = 350

4 0
3 years ago
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