All categories

3 years ago

Calcium and what makes bones hard

1 answer:

5 0

Bones are made up of a framework of a protein called collagen , with a mineral called calcium phosphate that makes the framework hard and strong. Bones store calcium and release some into the bloodstream when it's needed by other parts of the body.

You might be interested in

A ball is thrown straight up into the air with a speed of 21 m/s. If the ball has a mass of 0.1 kg, how high does the ball go? A

Grace [21]

Answer:

answer = 22.5m

Explanation:

using

$s = \frac{ {v}^{2} - {4}^{2} }{2a}$

s= (0²-21²)/2(-9.8)

s= -441/19.6

s= 22.5m

do consider marking as Brainliest if this helped!!

5 0

3 years ago

The molar mass of NaOH is 40.00 g/mol. If 5.20 g NaOH are dissolved in 0.500 L of solution, what is the molarity of the solution

lyudmila [28]

The molarity of the solution is 0.260 M

<u><em>calculation</em></u>

step 1: calculate the moles of NaOH

moles = mass÷ molar mas

= 5.20 g÷ 40.00 g/mol= 0.13 moles

Step 2: find the molarity of solution

molarity = moles÷volume in liters

=0.13 moles÷ 0.500 L = 0.260 M

3 0

4 years ago

Read 2 more answers

Which orbital has the highest energy level

fgiga [73]

Answer:

p orbitals

Explanation:

3 0

3 years ago

What evidence supports a scientist's conclusion that fossil B is older than fossil A? (4 points)

Hoochie [10]

Answer:

Choice B, as time goes on the surface level rises and stuff buried underground gets further and further below surface level.

3 0

3 years ago

Stearic acid, fatty acid commonly found in animal fat has a condensed Chemical formula CH3(CH2)16COOH. It is a common component

timofeeve [1]

Answer:

The correct answer is option C.

Explanation:

A. The -COOH group would experience hydrogen bonding with water.

The statement is true because , double bonded oxygen atom of carboxylic group interacts with hydrogen atom of water molecule and oxygen atom of water molecule is in same interaction with hydrogen atom of carboxylic acid.

B. The long alkane ''tail" $CH_3(CH_2)_{16} -$ , is hydrophobic.

The statement is true because , region which do not interacts with water molecule is termed as hydrophobic region and region which do interacts with water molecule is termed as hydrophilic region. Generally ,alkanes are are hydrophobic in nature so is the alkane chain in stearic acid.

C. Stearic acid and water are probably miscible.

The statement is false because of higher hydrophobic region the interaction between the acid molecules and water molecules results in immiscibility.

D. Stearic acid would probably dissolve in non polar solvents such as hexane $C_6H_{14}$ .

The statement is true because of hydrophobic part in stearic acid is larger so that is why it get easily dissolve in non polar solvents.

E. Stearic acid contains hydrophobic regions

The statement is true because of higher hydrophobic region due to which they easily get dissolved in organic and non polar solvents.

6 0

4 years ago