All categories

3 years ago

Essential amino acids are those that our bodies cannot synthesize.question 7 options: true false

2 answers:

defon3 years ago

7 0

An essential amino acid, or indispensable amino acid, is an amino acid that cannot be synthesized de novo by the organism, and thus must be supplied in its diet therefore making this statement true.

vivado [14]3 years ago

3 0

This statement is true

You might be interested in

A soluble iodide was dissolved in water. Then an excess of silver nitrate, AgNO3, was added to precipitate all of the io- dide i

Sergeeva-Olga [200]

Answer:

$m_{I^-}=1.18gI^-$

Explanation:

Hello,

In this case, the reaction is given as:

$I^-+AgNO_3\rightarrow AgI+NO_3^-$

Thus, starting by the yielded grams of silver iodide, we obtain:

$n_{I^-}=2.185gAgI*\frac{1molAgI}{234.77gAgI}*\frac{1molI}{1molAgI}=9.31x10^{-3}molI^-$

Which correspond to the iodide grams in the silver iodide. In such a way, by means of the law of the conservation of mass, it is known that the grams of each atom MUST remain constant before and after the chemical reaction whereas the moles do not, therefore, the mass of iodine from the silver iodide will equal the mass of iodine present in the soluble iodide, thereby:

$m_{I^-}=9.31x10^{-3}molI^-\frac{127gI^-}{1molI^-} =1.18gI^-$

And the rest, correspond to the iodide's metallic cation which is unknown. Such value has sense since it is lower than the initial mass of the soluble iodide which is 1.454g, so 0.272 grams correspond to the unknown cation.

Best regards.

7 0

4 years ago

Serena mixed two samples together: a gray solid that smells like flowers and a gray solid that smells like bleach. She analyzed

MariettaO [177]

Answer:c

Explanation:

7 0

4 years ago

A gold nugget has a density of 38.6g/cm3 and a mass of 270.2. what is its volume?

aivan3 [116]

Density is given by the equation D=m/V, were D is density, m is mass in grams, and V is volume in cubic centimeters.

In this problem, we have density and we have mass so we can plug into the equation and solve for V.

38.6=270.2/V

<em>*Multiply both sides by V*</em>

38.6V=270.2

<em>*Divide both sides by 38.6*</em>

V=7

The volume of the gold nugget is 7cm3.

Hope this helps!!

5 0

3 years ago

Read 2 more answers

Which individual elements make up the following common compounds? • CaCO3 • CaCl2 • C3H6O • HCl • Ca(OH)2

STatiana [176]

Calcium carbon oxygen, calcium chlorine, carbon hydrogen oxygen, hydrogen chlorine, calcium oxygen hydrogen I think ‍♀️ Hopefully it’s right or I helped a bit

8 0

4 years ago

Identify the effect of increasing acidity on the solubility of the given compounds Sr(OH)2 S r( O H) Subscript2 ZnS Z n S PbBr2

Dafna1 [17]

Answer:

Solubilities of $Sr(OH)_{2},ZnS,Ca_{3}(PO_{4})_{2} and BaCO_{3}$ increases with increasing acidity

Explanation:

$Sr(OH)_{2}\rightleftharpoons Sr^{2+}+2 OH^{-}$

Concentration of $OH^{-}$ decreases with increasing acidity. Therefore solubility of $Sr(OH)_{2}$ increases to keep constant solubility product.

$ZnS\rightleftharpoons Zn^{2+}+S^{2-}$

Concentration of $S^{2-}$ decreases with increasing acidity due to formation of $H_{2}S$ . therefore solubility of ZnS increases to keep constant solubility product

$PbBr_{2}\rightleftharpoons Pb^{2+}+2Br^{-}$

Increasing acidity have no effect on this above equilibrium. Therefore solubility of $PbBr_{2}$ remains constant.

$Ca_{3}(PO_{4})_{2}\rightleftharpoons 3Ca^{2+}+2PO_{4}^{3-}$

Concentration of $PO_{4}^{3-}$ decreases with increasing acidity due to formation of $H_{3}PO_{4}$ . Therefore solubility of $Ca_{3}(PO_{4})_{2}$ increases to keep constant solubility product.

$NaI\rightleftharpoons Na^{+}+I^{-}$

Increasing acidity have no effect on this above equilibrium. Therefore solubility of NaI remains constant.

$BaCO_{3}\rightleftharpoons Ba^{2+}+CO_{3}^{2-}$

Concentration of $CO_{3}^{2-}$ decreases with increasing acidity due to formation of $H_{2}CO_{3}$ . Therefore solubility of $BaCO_{3}$ increases to keep constant solubility product.

5 0

3 years ago