Insulin is a protein that is used by the body to regulate both carbohydrate and fat metabolism. a bottle contains 425 ml of insulin at a concentration of 20.0 mg/ml . what is the total mass of insulin in the bottle?

Answers

Answer 1

Answer: Answer is: mass of insulin in the bottle is 8500 milligrams or 8.5 grams.

V(insulin) = 425 ml; volume of solution.
d(insulin) = 20.0 mg/ml; density of solution.
m(insulin) = V(insulin) · d(insulin).
m(insulin) = 425 ml · 20 mg/ml.
m(insulin) = 8500 mg.
m(insulin) = 8500 mg ÷ 1000 ml/l.
m(insulin) = 8.5 g.

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What element has the least metallic character B,C,F,Li or Na?
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The relatively high boiling point of water is due to water havingA) hydrogen bondingB) metallic bondingC) nonpolar covalent bondingD) strong ionic bonding
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Where does plastic go when we throw it in the bin? A) Land dump. B) The Ocean. C) Recycling Factory. D) All of the above.

Which list of nuclear emissions is arranged in order from the greatest penetrating power to the least penetrating power?(1) alpha particle, beta particle, gamma ray
(2) alpha particle, gamma ray, beta particle
(3) gamma ray, alpha particle, beta particle
(4) gamma ray, beta particle, alpha particle

Answers

Answer: The order of penetrating power from greatest to least is gamma ray, beta particle, alpha particle.

Explanation:

Penetration power is defined as the movement of particles or the ray through an object. It is directly proportional to the energy of the particle.

$\text{Energy of the particle}\propto \text{Penetrating power}$

So, more is the energy of a particle, more will be its penetrating power.

We know that:

Gamma rays have the highest energy, followed by beta particle and then by alpha particle.

Thus, the ascending order of the penetration power of alpha rays, beta rays, and gamma rays will be:

Alpha rays < Beta rays < Gamma rays

Hence, the order of penetrating power from greatest to least is gamma ray, beta particle, alpha particle.

4. gamma ray, beta particle, alpha particle

The following reaction does not proceed to a product: H2O + Ag --> no reaction. Why is that?A) The reaction proceeds too slowly too create products.

B) The reaction cannot occur because water is reactant.

C) Silver has a higher activity than hydrogen and cannot replace it.

D) Silver has a lower activity than hydrogen and cannot replace it.

Answers

Answer:

D - Silver has lower reactivity than hydrogen and cannot replace it

Explanation:

If we assume , Ag also reacts just like other metals as

Metal + H₂O ---> Metal Hydroxide + H₂

then Ag forms as

Ag + H2O ----->AgOH + $(1)/(2)$ H2

here Ag is converting into Ag⁺ and 2H⁺ are converting into H₂

for reaction Ag --->Ag⁺ + e⁻ E° = -0.799 V

for reaction H⁺ + e⁻ ----> $(1)/(2)$ H₂ E° = 0 V

by Adding those 2 above equations net E° will be -0.799 which is negative.As per Faradays Law

ΔG° = -nFE°

here we got E° as negative then ΔG° will be positive

As per thermodynamics if ΔG° is +ve then reaction is not feasible

so, then given reaction does not occur.....

Answer:

Silver has lower reactivity than hydrogen and cannot replace it

Explanation:

took test

A solution of salt (molar mass 90 g mol-1) in water has a density of 1.29 g/mL. The concentration of the salt is 35% by mass.a. Calculate the molality of the solution.

b. Calculate the molarity of the solution.

c. Calculate the mole fraction of the salt in the solution.

Answers

The molarity of the solution is 5.018 mol/L and molality of the solution 5.9846 mol/kg.

Assume 100 g of solution the salt concentration- 35 % and water will be 65 %.

So,

mass of salt = 35 g

mass of water = 65 g

Number of moles,

$\bold {moles = \frac {mass} { molar\ mass}}$

So,

moles of salt = 35 g / 90 (g/mol) = 0.389 mole

moles of water = 65 / 18 = 3.6111 mole

Volume of solution,

$\bold {volume =\frac { mass } {density }}$

volume = 100 g / ( 1.29 g/ml)

volume of solution = 77.52 ml = 0.07752 L

$\bold {Molality = \frac {moles\ of \salt} { mass\ of\ water (kg)}}$

molality = 0.389 mol / 0.065 kg

molality = 5.9846 mol/kg

molarity = moles of salt / volume of solution (L)

molarity = 0.389 mol / 0.07752 L

molarity = 5.018 mol/L

mole fraction of salt = moles of salt / total moles

mole fraction of salt = 0.389 mol / ( 0.389 + 3.6111)

mole fraction of salt = 0.09725

To know more about Molarity,

brainly.com/question/12127540

Answer:

a) 5.9846 mol/kg

b) 5.018 mol/L

c)0.09725

Explanation:

consider 100 g of solution

now

since the salt is 35 % , water will be 65 %

now

mass of salt = 35 g

mass of water = 65 g

we know that

moles = mass / molar mass

moles of salt = 35 g / 90 (g/mol) = 0.389 mol

moles of water = 65 / 18 = 3.6111 mol

now

volume of solution = mass of solution / density of solution

volume of solution = 100 g / ( 1.29 g/ml)

volume of solution = 77.52 ml

volume of solution = 0.07752 L

a)molality = moles of salt / mass of water (kg)

molality = 0.389 mol / 0.065 kg

molality = 5.9846 mol/kg

molarity = moles of salt / volume of solution (L)

molarity = 0.389 mol / 0.07752 L

molarity = 5.018 mol/L

now

total moles in the solution = moles of salt + moles of water

total moles in the solution = 0.389 + 3.6111

total moles in the solution = 4 mol

now

mole fraction of salt = moles of salt / total moles

mole fraction of salt = 0.389 mol / 4 mol

mole fraction of salt = 0.09725

Find the element that makes milk good for your health. Is it a metal, nonmetal or metalloid?

Answers

Answer is Ca which is a metal.

Explanation: Milk is composed of many elements such as Calcium (Ca), Magnesium(Mg), Phosphorus(P), Potassium (K), Zinc(Zn) ans Selenium(Se). The major component present is Ca.

Calcium present helps in the formation of bones and teeth and maintaining it to keep healthy.

Elements which can loose electrons easily to obtain a stable configuration is called as a metal.

Calcium is a metal as it can easily loose 2 electrons to obtain a stable configuration.

$Ca\rightarrow Ca^(2+) +2e^-$

Final answer:

Calcium, a metal, is the element in milk that makes it beneficial for health. It contributes to healthy bones, teeth, and the proper functioning of various body organs. Metalloids or semimetals like boron or silicon are not responsible for the health benefits of milk.

Explanation:

The element that makes milk good for health is Calcium. Calcium is a metal that is needed by the body for healthy bones, teeth, and proper function of the heart, muscles, and nerves. It is a representative metal that shows good conduction of heat and electricity. Milk is a primary source of Calcium, which is why it is considered beneficial for health.

On the other hand, elements such as boron, silicon, germanium, arsenic, antimony, and tellurium are considered metalloids or sometimes semimetals, which exhibit properties between metals and nonmetals. However, these are not the elements responsible for the health benefits of milk.

Learn more about Calcium in Milk

brainly.com/question/11147973

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#1: Which of the following is an exothermic reaction? A. dissolving ammonium nitrate in water to cool the water B. condensation C. melting ice D. dissolving sugar in water. #2: Two objects (A and B) of the same temperature are in contact with each other. Which of the following statements is true? A. Heat transfers from object B to object A, because molecules from B collide with those from A. B. Heat transfers from object A to object B, because molecules from A collide with those from B. C. Although the molecules collide, no heat transfers because there is no temperature difference between the objects. D. No heat transfers, because there are no collisions between the molecules of the objects. #3: Which of the following parameters is kept constant in a coffee-cup calorimeter? A. temperature B. volume C. pressure D. kinetic energy #4: What type of substance would be best for use in a heating system? A. a liquid with a high specific heat B. a solid with a high specific heat C. a liquid with a low specific heat D. a gas with a low specific heat. #5: The reaction 2 NO(g) → N2(g) + O2(g) has a ΔH = -180.5 kJ. How much heat will be required to produce 44.8 L of NO by the reverse reaction? A. 644 kJ B. 180.5 kJ C. 301 kJ D. 322.3 kJ

Answers

These are the following answers to the five questions:
(1) (B) condensation. Condensation is exothermic, but it's not a reaction, it's a physical change.
(2) (C) Although the molecules collide, no heat transfers because there is no temperature difference between the objects.
(3) (C) pressure
(4) (A) a liquid with a high specific heat
(5) Supposing the NO is measured at STP:
(44.8 L) / (22.4 L/mol) x (180.5 kJ / 2 mol NO) = (B) 180.5 J

(1) (B) condensation. Condensation is exothermic, but it's not a reaction, it's a physical change.

(2) (C) Although the molecules collide, no heat transfers because there is no temperature difference between the objects.

(3) (C) pressure

(4) (A) a liquid with a high specific heat

(5) Supposing the NO is measured at STP:

(44.8 L) / (22.4 L/mol) x (180.5 kJ / 2 mol NO) = (B) 180.5 J

Bacteria are smaller than viruses.

True

False

Answers

Answer:

false

Explanation:

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Which part of experimental design is most important to a scientist when replicating an experiment? Having exactly the same data as the previous experiment using the same procedure and variables as the previous experiment conducting an experiment similar to the previous experiment using the same laboratory that was used in the previous experiment