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3 years ago

AnonymousXDX can you answer this question to

Chemistry

1 answer:

IgorC [24]3 years ago

3 0

Answer:

Explanation:

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Calculate the percent by mass of 10 grams of calcium hydroxide mixed in 65 grams of water

sukhopar [10]

Answer:

13.3 %

Explanation:

Percent by mass indicates the mass of solute in 100g of solution.

We must know the solution's mass:

Solution's mass = Solute mass + solvent mass

Solution's mass = 10 g + 65 g = 75 g

Percent by mass = (10 g / 75 g).100 = 13.3 %

Otherwise, we can make a rule of three:

In 75 g of solution we have 10 g of solute

In 100 g of solution we must have (100 . 10) /75 = 13.3 %

5 0

3 years ago

An infant acetaminophen suspension contains 80 mg/0.80 mL suspension. The recommended dose is 15 mg/kg body weight.

Brrunno [24]

Answer:

0.8853 mL

Explanation:

First we <u>convert 13 lb to kg</u>, keeping in mind that <em>1 lb = 0.454 kg:</em>

13 lb * $\frac{0.454kg}{1lb}$ = 5.902 kg

Then we <u>calculate how many mg of acetaminophen should be given</u>, using the <em>recommended dose and infant mass</em>:

15 mg/kg * 5.902 kg = 88.53 mg

Finally we<u> calculate the required mL of suspension</u>, using its <em>concentration</em>:

88.53 mg ÷ (80 mg/0.80 mL) = 0.8853 mL

8 0

3 years ago

Much like a battery wood contains stored energy.what energy transformation occur when wood is burned

slava [35]

Answer:

Chemical energy to heat and light

Explanation:

When wood is burned, the chemical energy of the chemical compounds present in wood is converted to heat and light energy.

6 0

3 years ago

Read 2 more answers

(20 POINTS!!) Which Statement correctly explains why H2S is a stronger acid than water?

astra-53 [7]

Answer:

a) is the answer

Explanation:

5 0

3 years ago

What are chemical? give some examples

denis-greek [22]

Explanation:

<h2>A chemical substance is a form of matter having constant chemical composition and characteristic properties. Some references add that chemical substance cannot be separated into its constituent elements by physical separation methods, i.e., without breaking chemical bonds.</h2><h2>Examples of Chemical Changes</h2><h2>Examples of Chemical ChangesBurning wood.</h2><h2>Examples of Chemical ChangesBurning wood.Souring milk.</h2><h2>Examples of Chemical ChangesBurning wood.Souring milk.</h2>

7 0

3 years ago