Passive prosthetics came about to meet what need?
A. The need for implanted materials to be biocompatible
B. The need for stronger devices
C. The need for devices to function without an external power source
D. The need for smaller devices

Answer:

It has a lower density in its solild stae than it does in its liquid state.

Explanation:

Ice floats, allowing life underneath to leave despite the top freezing.

The statement that describes a unique property of water that helps sustain marine life is that has a lower density in its solid state than it does in its liquid state.

Water is a unique molecule that possesses unique properties as follows:

These unique characteristics of water helps aquatic organisms sustain life in a marine environment.

Therefore, statement that describes a unique property of water that helps sustain marine life is that has a lower density in its solid state than it does in its liquid state.

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Answer:

N2 +3 H2 → 2 NH3

so we have 2180 g of N2

or 2.80 g ÷ 28.02 g/mol = 0.100 mol

1 mol of N2 react with 3 moles of H2

Therefore 0.100 mol of N2 react with 0.3 moles of H2

0.300 mol X Molar mass (2.00 g/mol) = 0.600 g

0.600 g of H[tex]_2[/tex] are needed to react with 2.80 g of  N[tex]_2[/tex].  Mole is one of the International System for Units' seven foundation units (SI).

A mole is just a measuring scale. In reality, it is one of the International System for Units' seven foundation units (SI). When already-existing units are insufficient, new ones are created. Using absolute amounts of atoms, molecules, or ions would be problematic as well since chemical reactions frequently occur at levels that use grams would be inappropriate.

A mole consists of precisely 6.022140761023 particles. The "particles" might be anything, from tiny things like electrons and atoms to enormous things like stars or elephants.

N[tex]_2[/tex] +3 H[tex]_2[/tex] → 2 NH[tex]_3[/tex]

2.80 g ÷ 28.02 g/mol = 0.100 mol of N[tex]_2[/tex]

1 mol of N[tex]_2[/tex] react with 3 moles of  H[tex]_2[/tex]

0.100 mol of  N[tex]_2[/tex] react with 0.3 moles of H[tex]_2[/tex]

0.300 mol X Molar mass (2.00 g/mol) = 0.600 g of H[tex]_2[/tex]

Therefore, 0.600 g of H[tex]_2[/tex] are needed to react with 2.80 g of  N[tex]_2[/tex].

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Answer: Groups

Explanation:

I took the quiz

Answer:

0.0286M

Explanation:

Using the formula as follows:

CaVa = CbVb

Where;

Ca = concentration of HCl acid (M)

Cb = concentration of NaOH base (M)

Va = volume of HCl acid (mL)

Vb = volume of NaOH base (mL)

According to the information provided in this question;

Ca = 0.10 M

Cb = ?

Va = 10mL

Vb = 35mL

Using CaVa = CbVb

Cb = CaVa/Vb

Cb = (0.10 × 10) ÷ 35

Cb = 1 ÷ 35

Cb = 0.0286M

Answer: The correct number of significant figures in [tex]7.68 \times 4.564[/tex] is 35.05152.

Explanation:

Digits present in a number that helps in determining the degree of accuracy starting from the first non-zero digit is called a significant figure.

Some rules for significant figures are as follows.

For example, 2085 contains 4 significant digits.

For example, 0.0034 has 2 significant digits.

For example, 0.02500 has 4 significant figures.

For example, 19000 has 2 significant digits.

Now, the product of given digits is as follows.

[tex]7.68 \times 4.564 = 35.05152[/tex]

Thus, we can conclude that correct number of significant figures in [tex]7.68 \times 4.564[/tex] is 35.05152.

Answer: The answer is A.

Answer:

please where is the Gibb free energy to indicate if its exothermic or endothermic reaction but the chemical equation is homogeneous one.

Answer:

The pitch of a sound is related to its frequency.

Explanation:

The higher the frequency, the higher the pitch will be

Amplitude is related to how loud a sound is

Answer:

The answer is 44.0095. We assume you are converting between grams CO2 and mole.

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Plzzzzzzzzzzzzzzzz can you follow me please

Answer:

Flavors and fragrances

Answer:

False because pH value below 7 are considered acidic.

Answer:

Any solution that has a pH of less than 7 is considered acidic, and anything above a pH of 7 is basic .

Explanation:

Answer:

nooooo it is not equal to it

Answer: The mass of [tex]H_2[/tex] produced is 0.153 g

Explanation:

The number of moles is defined as the ratio of the mass of a substance to its molar mass. The equation used is:

[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex] ......(1)

Given mass of zinc = 5.0 g

Molar mass of zinc = 65.38 g/mol

Putting values in equation 1, we get:

[tex]\text{Moles of zinc}=\frac{5.0g}{65.38g/mol}=0.0765mol[/tex]

Given mass of HCl = 10.0 g

Molar mass of HCl = 36.46 g/mol

Putting values in equation 1, we get:

[tex]\text{Moles of HCl}=\frac{10.0g}{36.46g/mol}=0.274mol[/tex]

The given chemical equation follows:

[tex]Zn+2HCl\rightarrow ZnCl_2+H_2[/tex]

By stoichiometry of the reaction:

If 1 mole of zinc reacts with 2 moles of HCl

So, 0.0765 moles of zinc will react with = [tex]\frac{2}{1}\times 0.0765=0.153mol[/tex] of HCl

As the given amount of HCl is more than the required amount. Thus, it is present in excess and is considered as an excess reagent.

Thus, zinc is considered a limiting reagent because it limits the formation of the product.

By the stoichiometry of the reaction:

If 1 mole of zinc produces 1 mole of [tex]H_2[/tex]

So, 0.0765 moles of zinc will produce = [tex]\frac{1}{1}\times 0.0765=0.0765mol[/tex] of [tex]H_2[/tex]

We know, molar mass of [tex]H_2[/tex] = 2 g/mol

Putting values in above equation, we get:

[tex]\text{Mass of }H_2=(0.0765mol\times 2g/mol)=0.153g[/tex]

Hence, the mass of [tex]H_2[/tex] produced is 0.153 g

Answer:

Mole ratio is 1:1

Explanation:

The equation is:

PCl₃ +  Cl₂  →  PCl₅

We see that is correctly balanced.

1 mol of PCl₃ react to 1 mol of chlorine gas in order to produce 1 mol of PCl₅

That's why, the mole ratio is, 1:1

There is not another number than 1, at stoichiometry of reaction.

The reactants are A: Carbon Dioxide and water

Answer:

255mL

Explanation:

(250.0 + 5.00)mL = 255.00mL

255mL

Answer:

This is an abbreviation for "parts per million" and it also can be expressed as milligrams per liter (mg/L). This measurement is the mass of a chemical or contaminate per unit volume of water. Seeing ppm or mg/L on a lab report means the same thing.

Answer:

solution d with pH of 7.9

Answer:

because it will control the birth of a child which can happen alot being overpopulated in the country or world. It also can mange their life and create a small and happy and healthy family.Also the child can get more love and support from their parents if they have less children and it wont be a taruma for the couple as well.  because growing a child can be expensive time costly and really hard.  

plz mark me as a brainlest a and thanks my answer

Explanation:

and btw i think the subject should be biology not chemestry

Answer:

Option B. 4.25×10¯¹⁹ J

Explanation:

From the question given above, the following data were obtained:

Frequency (f) = 6.42×10¹⁴ Hz

Energy (E) =?

Energy and frequency are related by the following equation:

Energy (E) = Planck's constant (h) × frequency (f)

E = hf

With the above formula, we can obtain the energy of the photon as follow:

Frequency (f) = 6.42×10¹⁴ Hz

Planck's constant (h) = 6.63×10¯³⁴ Js

Energy (E) =?

E = hf

E = 6.63×10¯³⁴ × 6.42×10¹⁴

E = 4.25×10¯¹⁹ J

Thus, the energy of the photon is 4.25×10¯¹⁹ J

Answer:

B. 4.25 x 10-19J is correct via a p e x

Explanation:

Answer:

See Explanation

Explanation:

Ionic compounds are composed of crystals. The crystal structure of an ionic compound is responsible for its hardness.

A crystalline solid contains a well organized structure which enables it to be hard and have a particular geometric shape as well defined melting point.

Hence, all the observed characteristics of NaCl are the result of its crystalline structure.

Answer:

1 large

2 small

balance out means remove

Answer:

32000atm

Explanation:

Using Boyle's law equation;

P1V1 = P2V2

Where;

P1 = initial pressure (atm)

P2 = final pressure (atm)

V1 = initial volume (

V2 = final volume (L)

According to the question below:

P1 = 160.0 atm

P2 = 3.0 atm

V1 = 600L

V2 = ?

Using P1V1 = P2V2

160 × 600 = 3 × V2

96000 = 3V2

V2 = 96000/3

V2 = 32000atm

Answer: SMALLEST is lithium

LARGEST is Fluorine

Explanation:

Answer:

i. The height of its jump is approximately 0.115 m

ii. The time of flight of its jump is approximately 0.306 seconds

iii. The range of its jump is approximately 0.795 m

Explanation:

The angle at which the grasshopper jumps, θ = 30°

The speed with which the grasshopper takes off, u = 3 m/s

i. The height of its jump 'h', is given by the following relation;

[tex]h = \dfrac{u^2 \times sin^2 \theta}{2 \times g}[/tex]

Where;

g = The acceleration due to gravity ≈ 9.81 m/s²

Therefore;

[tex]h \approx \dfrac{3^2 \times sin^2 (30^{\circ})}{2 \times 9.81} = \dfrac{25}{218} \approx 0.115[/tex]

The height of its jump, h ≈ 0.115 m

ii. The time of flight of its jump, 't', is given as follows;

[tex]The \ time \ of \ flight, \, t = \dfrac{2 \times u \times sin \theta}{ g}[/tex]

Therefore;

[tex]t \approx \dfrac{2 \times 3 \times sin (30 ^ {\circ})}{ 9.81} = \dfrac{100}{327} \approx 0.306[/tex]

The time of flight of its jump, t ≈ 0.306 seconds

iii. The range of the jump is given by the following projectile motion equation for the range as follows;

[tex]R = \dfrac{u^2 \times sin (2 \times \theta)}{ g}[/tex]

Therefore;

[tex]R \approx \dfrac{3^2 \times sin (2 \times 30^ {\circ})}{ 9.81} = \dfrac{41659} {52433} \approx 0.795[/tex]

The range of the jump, R ≈ 0.795 m.

Answer:

0.015382279644614 mole.

Answer:

yes this is the answer for that quaz

H2SO4 + 2KCL ----------› K2SO4 + 2HCL

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