what’s the answer??

Answer:

:)

Explanation:

The substance(s) to the left of the arrow in a chemical equation are called reactants. A reactant is a substance that is present at the start of a chemical reaction. The substance(s) to the right of the arrow are called products . A product is a substance that is present at the end of a chemical reaction.

Answer: a responsibilty

Explanation:

An obligation to do something or control over or care for someone. ​The word suitable for it is "responsibility".

An obligation is a duty or responsibility to do anything that is required by law, custom, or moral standards.

Responsibility is an obligation to do something or control over or care for someone. It is a duty or task that one is required to undertake.

Responsibility can be of different forms, such as personal, social, or professional.

Personal responsibility refers to the responsibility that an individual has for their own actions and decisions.

Social responsibility refers to the responsibility that an individual or organization has to act in the best interest of society.

Professional responsibility refers to the responsibility that individuals have to perform their job duties to the best of their ability.

Therefore, the term most suits for the given statement is "responsibility".

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Answer:

110.91 g of CaCl2

Explanation:

11.9 grams of CaCl₂ is required to make 1 Liter of 0.1M solution.

We first need to calculate the molecular weight of calcium chloride CaCl₂.

The atomic weight of Ca = 40.01

and the atomic weight of Cl₂ = 2×35.45 = 70.90

So, the molecular weight of CaCl₂ = 40.01 + 70.90 = 110.91

This means that 110.91 g of CaCl₂ mixed with enough water will produce 1Liter of 1M solution.

Now, to calculate the amount of CaCl₂ required to make 1 Liter of 0.1M solution we use:

grams of chemical = (molarity of solution in mole/liter) x (MW of chemical in g/mole) x (ml of solution) ÷ 1000 ml/liter

= 0.1 × 110.91 × 1000 ÷ 1000

= 11.09 grams

So, 11.09 grams of CaCl₂ will be used.

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According to the electronic configuration of boron, there are three electrons in the Bohr model of a boron atom.

Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.

Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.

Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.

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Answer:B

Explanation:

Answer:

it would be an element because its an element

Explanation:

Conduction is the transfer of thermal energy through direct contact. Convection is the transfer of thermal energy through the movement of a liquid or gas.

So I think you should go with the 3rd option.

Hope this was helpful.

Answer:

What the other guy said

Explanation:

Answer:

Percentage mass of copper in the sample = 32%

Explanation:

Equation of the reaction producing Cu(NO₃) is given below:

Cu(s)+ 4HNO₃(aq) ---> Cu(NO₃)(aq) + 2NO₂(g) + 2H₂O(l)

From the equation of reaction, 1 mole of Cu(NO₃) is produced from 1 mole of copper. Therefore, 0.010 moles of Cu(NO₃) will be produced from 0.010 mole of copper.

Molar mass of copper = 64 g/mol

mass of copper = number of moles * molar mass

mass of copper = 0.01 mol * 64 g/mol = 0.64 g

Percentage by mass of copper in the 2.00 g sample = (0.64/2.00) * 100%

Percentage mass of copper in the sample = 32%

Answer:

Number of moles of C produced =  58.08 mol

Explanation:

Given data:

Mass of sugar = 1745 g

Moles of C produced = ?

Solution:

Chemical equation:

C₆H₁₂O₆  +   6H₂SO₄    →     6C + 6(H₂SO₄.H₂O)

Number of moles of sugar:

Number of moles = mass/molar mass

Number of moles = 1745 g/180.16 g/mol

Number of moles = 9.68 mol

Now we will compare the moles of C and sugar.

                 C₆H₁₂O₆          :           C

                      1                  :           6

                    9.68              :          6×9.68 = 58.08 mol

Number of moles of C produced =  58.08 mol

Answer:

The nitrogen atom has 5 electrons in the outermost shell, so it can accept 3 electrons to fulfil the octet structure. Therefore the valency of nitrogen is 3.

Explanation:

So what do you wanna know? The definition?

In atomic physics and quantum chemistry, the electron configuration is the distribution of electrons of an atom or molecule in atomic or molecular orbitals. For example, the electron configuration of the neon atom is 1s² 2s² 2p⁶, using the notation explained below.

Answer:

The cube

Explanation:

When the cube is put on the triple beam balance it gives the mass of 429.3

Answer : The volume of solution is 0.884 L

Explanation :

Molarity : It is defined as the number of moles of solute present in one litre of solution.

Formula used :

[tex]Molarity=\frac{\text{Mass of solute}}{\text{Molar mass of solute}\times \text{Volume of solution}}[/tex]

Solute is, [tex]KNO_3[/tex]

Given:

Molarity = 0.750 M

Molar mass of [tex]KNO_3[/tex]  = 101 g/mole

Mass of [tex]KNO_3[/tex]  = 67.0 g

Now put all the given values in the above formula, we get:

[tex]0.750M=\frac{67.0g}{101g/mole\times \text{Volume of solution}}[/tex]

[tex]\text{Volume of solution}=0.884L[/tex]

Therefore, the volume of solution is 0.884 L

Answer:

[tex]2,092,000J[/tex]

Explanation:

Hello.

In this case, we need to perform a unit conversion problem between cal and joule, taking into account that 1 cal equals 4.184 joules of energy, therefore, we write the following proportional factor:

[tex]500,000cal*\frac{4.184J}{1cal}[/tex]

Whereas the 1 cal is written under the line in order to simplify the initial can and the 4.184 J on the line as joules are the required units. Thus, we obtain:

[tex]2,092,000J[/tex]

As the energy required to burn off such amount of energy given of potato chips.

Best regards.

Answer:

catalase

Explanation:

catalase is enzime the rest are glucides

Answer:

1:MgCO3 (s) + 2 NaNO3

2:agcl(s)+kno3(aq)

3:alcl3(aq)+h2(g)

4:NaNO3 + CO2 + H2O

(not sure abt last one)

Answer:

helium

The ionization energy decreases from top to bottom in groups, and increases from left to right across a period. Thus, helium has the largest first ionization energy, while francium has one of the lowest.

Answer:

What patterns do volcanoes form?

Volcanoes occur at convergent plate boundaries were subducting oceanic crust is melted. This magma rises through the crust to form volcanoes and volcanic island arcs. Volcanoes occur at divergent plate boundaries where upwelling magma pushes between plates (rift zones) as the plates move apart.

Answer:

Explanation:

Thank you ☺️☺️

Answer:

Option A. 250 mL

Explanation:

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

Molarity of NaCl = 3 M

Mass of NaCl = 43.83 g

Volume of water =..?

Next, we shall determine the number of mole in 43.83 g of NaCl. This can be obtained as follow:

Mass of NaCl = 43.83 g

Molar mass of NaCl = 23 + 35.5 = 58.5 g/mol

Mole of NaCl =?

Mole = mass/molar mass

Mole of NaCl = 43.83/58.5

Mole of NaCl = 0.749 mole

Next, we shall determine the volume of water required to prepare the solution as follow:

Mole of NaCl = 0.749 mole

Molarity of NaCl = 3 M

Volume of water =..?

Molarity = mole /Volume

3 = 0.749 /volume

Cross multiply

3 × volume = 0.749

Divide both side by 3

Volume = 0.749/3

Volume = 0.25 L

Finally, we shall convert 0.25 L to millilitres (mL). This can be obtained as follow:

Recall:

1 L = 1000 mL

Therefore,

0.25 L = 0.25 L × 1000 mL / 1 L

0.25 L = 250 mL

Therefore, 0.25 L is equivalent to 250 mL.

Thus, the volume of water needed to prepare the solution is 250 mL

Answer:

V= in square root 2KE/M=2(143.3J)/0.047kg=6097.8723 in square root around 78.1 approxmete

Kinetic energy is directly proportional to the mass and square of speed of a moving body. Here, the speed of the body of mass 47 g or 0.47 kg with akinetic energy of 143.3 J is 24.6 m/s.

Kinetic energy is a generated by virtue of motion of a body. It is half of the product of mass and square of velocity. Thus as mass is increase kinetic energy also increases.

If velocity is doubled then kinetic energy increases 4 times. Since velocity or speed is in square in the equation written as follows:

KE = 1/2 mv² . Here, m is the mass and v be the speed.

Here, kinetic energy is given 143.3 J and mass of the moving body is 0.47 kg and speed can be calculated by rearranging the equation as follows:

[tex]v = \sqrt{\frac{KE \times 2 }{m } \\\\\\ = \sqrt{\frac{43.3 J \times 2}{0.47 kg} \\\\\\\\\\\\\\ = 24.6 m/s[/tex]

Hence, the speed of the body of mass 47 g or 0.47 kg with akinetic energy of 143.3 J is 24.6 m/s.

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Answer:

I think its 1.72 (:

Explanation:

Answer:

Corresponding with orange light, is the wavelength that blue solutions absorb the most.

Explanation:

When light is passed through a solution of a particular color, light of other wavelength or color, is absorbed and disappears, whereas the wavelength of light corresponding to the color of that solution is transmitted. The color of light absorbed the most is that which is complementary (opposite it in the color wheel) to the light which is transmitted. In a color wheel, blue is complementary to orange color, red is complementary to green and yellow is complementary to violet.

Therefore, in a blue substance (as in the blue solutions), there would be a strong absorbance of the complementary color of light, orange. Since the wavelength of orange color of light is between 600 - 640 nm, with maximum absorbance of orange light occurring around 633 nm, the wavelength of 633 nm is used to analyze the standard solutions and drink samples.