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3 years ago

As we move UP a energy pyramid, the amount of energy available to each level of consumers

Chemistry

1 answer:

cricket20 [7]3 years ago

7 0

Answer:

well we do need up to explain the neergyu field on the world you probaly think im spamming but i thing you need up

Explanation:

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With your class, look up the element names for each symbol in the word "BOOK" and list the element names.

aleksandr82 [10.1K]

Explanation:

The word BOOK; is made up of 4 letters and each actually represents the symbol of an element.

An element is a distinct substance that cannot be split-up into simpler substances.

B - Boron

O - Oxygen

K - Potassium

We can see that the word BOOK shows us elements boron, oxygen, oxygen and potassium.

3 0

3 years ago

What is the molarity of a salt solution made by dissolving 250.0 grams of NaCl in 775 mL of solution?

tester [92]

The molarity of a salt solution made by dissolving 250.0 grams of NaCl in 775 mL of solution is 5.52 M .

Explanation:

The molarity of a solution tells one how many moles of solute one can get per liter of solution.One should remember to must convert this volume to liters by using the conversion factor:

1 L = 10³ml

Sodium chloride (NaCl) has a molar mass of 58.44 g per mol , which means that the sample will contain:

$250 \mathrm{g} \times \frac{1 \text { mole of } \mathrm{Nacl}}{58.44 \mathrm{g}}=4.278 \text { mole of } \mathrm{Nacl}$

This means that the molarity of the solution will be:

$\text {Molarity,c}=\frac{n_{\text {solute}}}{V_{\text {solution }}}=\frac{4.28}{775 \times 10^{-3}}=0.00552 \times 10^{3}=5.52 M$

7 0

3 years ago

Which of the following is true about the concept of half-life?

Reptile [31]

Its A. because it measures the rate of the decay of the isotope

8 0

3 years ago

Read 2 more answers

How many atoms are below? C6H1206

Vinvika [58]

Answer:

24 atoms

Explanation:

6 Carbon atoms

12 Hydrogen atoms

6 Oxygen atoms

8 0

3 years ago

A sample of water (88 grams) had a temperature change of 6.0 ℃. What was the heat change of this sample? (q = m c ΔT, c = 4.18 J

jeka94

Answer:

$Q=2209J$

Explanation:

Hello!

In this case, since the heat involved during a heating process is computed in terms of mass, specific heat and temperature change as shown below:

$Q=mC\Delta T$

Thus, since the heated mass of water was 88 g, the specific heat of water is 4.184 J/g°C and the temperature change is 6.0 °C, we can compute the heat as shown below:

$Q=88g*4.184\frac{J}{g\°C}*6.0\°C \\\\Q=2209J$

Best regards!

7 0

3 years ago