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3 years ago

Calcium is found in your bones. This is an example of a mineral being used for ________ purposes.

Chemistry

2 answers:

ra1l [238]3 years ago

6 0

Plato Answer Choices

$\left[\begin{array}{ccc}A\\B&CORRECT\\C\\D\end{array}\right]$

Calcium is found in your bones. This is an example of a mineral being used for ________ purposes

<em>"Biology is the natural science that studies life and living organisms, including their physical structure, chemical processes, molecular interactions, physiological mechanisms, development and evolution. ..."</em>

A. Household

<em>B. Biological </em>

C. Decorative

D. Scientific

faltersainse [42]3 years ago

3 0

the answer is living

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Some athletes have as little as 3.0% body fat. If such a person has a body mass of 67 kg , how many pounds of body fat does that

Elanso [62]

Data:
mass = 67 Kg → 147.71 pounds

Solving:

$\frac{3}{100}*147.71 = \frac{443.13}{100} \approx \boxed{4.43\:pounds\:of\:body\:fat}\end{array}}\qquad\quad\checkmark$

8 0

3 years ago

he combustion of propane (C3H8) is given by the balanced chemical equation C_3H_8+5O_2\longrightarrow3CO_2+4H_2O C 3 H 8 + 5 O 2

Basile [38]

Answer:

290 grams

Explanation:

Let's begin by writing the balanced chemical equations:

$C_{3}H_{8} +5O_{2} --->3CO_{2} +4H_{2}O$

Then we calculate the number of moles in 97g of propane.

n(propane)= $\frac{mass}{molarmass} =\frac{97g}{44.1g/mol}=2.1995mol$

According to the balanced chemical equation, one mole of propane produces 3 moles of carbon dioxide. So the available number of moles of propane must be multiplied by three to work out the number of carbon dioxide produced.

n(carbon dioxide)= 2.1995mol*3 = 6.5985mol

mass(carbon dioxide) = moles * molar mass

= 6.5985 mol * 44.01 g/mol

= 290 grams

4 0

3 years ago

Which parts of sedimentary rock formation include the breakdown and carrying away of existing rock? Check all that apply.

stiks02 [169]

Answer

Weathering and erosion are two processes of which sedimentary rocks are broken down and carry away existing rocks.

Explanation:

3 0

3 years ago

Is it living or nonliving?

Fittoniya [83]

Answer:

One kind is called living things. Living things eat, breathe, grow, move, reproduce and have senses. The other kind is called nonliving things. Nonliving things do not eat, breathe, grow, move and reproduce.

8 0

3 years ago

The total volume required to reach the endpoint of a titration required more than the 50 mL total volume of the buret. An initia

Margaret [11]

Answer:

The endpoint volume is 50.52 ± 0.14 mL

Explanation:

In a titration always is necessary to subtract the blank volume to the titrant volume to obtain the real volume of the titrant. Thus in this case, the total endpoint volume is the sum of the initial volume delivered and the second volume delivered, minus the blank volume:

V = (49.16±0.06 mL) + (1.69±0.04 mL) - (0.33±0.04 mL)

V = (49.16 + 1.69 - 0.33) ± (0.06+0.04+0.04) mL

V = 50.52 ± 0.14 mL

It is necessary to consider the sum of the errors too.

7 0

3 years ago