The wrist is ________________ to the hand.

1.14m x MG is the answer

Answer:

a

Explanation:

they have to have the same numbers on each side.

According to the law of conservation of mass, the total mass in the product side is equal to the mass in the reactant side of a reaction. Thus, option A that is The products must contain the same number and same types of atoms as the reactants is correct.

Mass conservation is similar to law of energy conservation. That is mass can neither be created nor be destroyed. Thus The total mass in a system is conserved. Therefore,in reaction the mass of product have to be  equal to the mass of reactant.

A balanced reaction represent all reactants in their state and in perfect stoichiometry. Hence, each elements have to be equal in number on both side. No new atoms is created here and no atom is lost.Same number and same type will be in both side.

During a chemical reaction, the regrouping of atoms occurs to form the new product. Hence, no new atoms are added . Therefore The products must contain the same number and same types of atoms as the reactants and satisfies the mass conservation.

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The controlled burn cause of wildfires is least likely to lead to catastrophic results. Therefore, option (C) is correct.

A controlled burn is a fire set intentionally for purposes of forest management, prairie restoration, farming, or greenhouse gas. A controlled burn refers to the intentional burning of slash, fuels through burn piles.

Controlled burning can be done during the cooler months to reduce fuel buildup and reduce the likelihood of serious hotter fires. Controlled burning enhances the germination of desirable forest trees, and exposes soil mineral layers which expand seedling vitality.

Controlled burning is also useful in agriculture as it is often referred to as slash and burns. It is one component of shifting cultivation, as a section of field preparation for planting called field burning. This technique is utilized to clear the land of any existing crop residue and kill weeds and weed seeds.

Field burning is less expensive but because it forms smoke and air pollutants, its use is not common in agricultural areas.

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Answer:

801 g

Explanation:

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

Number of mole of Ba₃(PO₄)₂ = 1.33 moles

Mass of Ba₃(PO₄)₂ =?

Next, we shall determine the molar mass of Ba₃(PO₄)₂. This can be obtained as follow:

Molar mass of Ba₃(PO₄)₂ = (137.3×3) + 2[31 + (4×16)]

= 411.9 + 2[31 + 64]

= 411.9 + 2[95]

= 411.9 + 190

Molar mass of Ba₃(PO₄)₂ = 601.9 g/mol

Finally, we shall determine the mass of Ba₃(PO₄)₂. This can be obtained as follow:

Number of mole of Ba₃(PO₄)₂ = 1.33 moles

Molar mass of Ba₃(PO₄)₂ = 601.9 g/mol

Mass of Ba₃(PO₄)₂ =?

Mole = mass /Molar mass

1.33 = Mass of Ba₃(PO₄)₂ / 601.9

Cross multiply

Mass of Ba₃(PO₄)₂ = 1.33 × 601.9

Mass of Ba₃(PO₄)₂ = 801 g

Answer: Across each row, or period, of the periodic table, the number of valence electrons in groups 1–2 and 13–18 increases by one from one element to the next. Within each column, or group, of the table, all the elements have the same number of valence electrons.

Relationship between the period number and the number of valence electrons:

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Answer:

its electron

Explanation:

i dont have an explanation but i hope you get it right

Answer:

This is the idea of spontaneous generation, an obsolete theory that states that living organisms can originate from inanimate objects. Other common examples of spontaneous generation were that dust creates fleas, maggots arise from rotting meat, and bread or wheat left in a dark corner produces mice

Explanation:

hope you like my answer

Answer:

136.63 °C

Explanation:

ΔTb=Tb solution - Tb pure

Where; Tb pure = 133.60°C

molar mass of solute = 121.14 g/mol

number of moles of solute; 52.2g/121.14 g/mol = 0.431 moles

molality = 0.431 moles/350 * 10^-3 = 1.23 molal

Then;

ΔTb = Kb * m * i

Kb = 2.46°C kg mol^-1

m = 1.23 molal

i = 1

ΔTb = 2.46 * 1.23 * 1

ΔTb = 3.03 °C

Hence;

Tb solution = ΔTb + Tb pure

Tb solution = 3.03 °C + 133.60°C

Tb solution = 136.63 °C

Answer:

3 one

Explanation:

Answer: 101 moles of oxygen are contained in the tank

Explanation:

According to ideal gas equation:

[tex]PV=nRT[/tex]

P = pressure of gas = 204.047  atm

V = Volume of gas = 12.0 L

n = number of moles  = ?

R = gas constant =[tex]0.0821Latm/Kmol[/tex]

T =temperature =[tex]22.0^0C=(22.0+273)K=295K[/tex]

[tex]n=\frac{PV}{RT}[/tex]

[tex]n=\frac{204.047atm\times 12.0L}{0.0821 L atm/K mol\times 295K}=101moles[/tex]

Thus 101 moles of oxygen are contained in the tank

Answer:

Mass = 0.697 g

Explanation:

Given data:

Volume of hydrogen = 1.36 L

Mass of ammonia produced = ?

Temperature = standard = 273.15 K

Pressure = standard = 1 atm

Solution:

Chemical equation:

3H₂ + N₂       →      2NH₃

First of all we will calculate the number of moles of hydrogen:

PV  = nRT

R = general gas constant = 0.0821 atm.L/mol.K

1atm ×1.36 L = n × 0.0821 atm.L/mol.K × 273.15 K

1.36 atm.L = n × 22.43 atm.L/mol

n = 1.36 atm.L / 22.43 atm.L/mol

n = 0.061 mol

Now we will compare the moles of hydrogen and ammonia:

                 H₂         :          NH₃

                  3          :            2

                0.061     :         2/3×0.061 = 0.041

Mass of ammonia:

Mass = number of moles × molar mass

Mass = 0.041 mol × 17 g/mol

Mass = 0.697 g

Answer:

is always exothermic

Explanation:

You see, whether a process is endothermic or exothermic depends on the result of the operation; ΔHreaction= ΔHproducts - ΔHreactants.

If the enthalpy of reactants exceeds that of the products, then the process is exothermic.

We should remember that the energy of isolated atoms is always higher than the energy of the compound formed when the atoms bond together. Hence bond making is an exothermic process.

Energy is used to form bonds and released when they are broken, bond-breaking is considered to be endothermic. Additionally, the creation of bonds is typically an exothermic process. The formation of chemical bonds from separated atoms is exothermic. The correct option is 4.

When bonds are created in the products of exothermic processes, more energy is produced than is required to break the bonds between the reactants. The temperature of the reaction mixture rises as a result of exothermic reactions. Endothermic chemical processes are those that generally absorb (or use) energy.

An attraction between atoms or ions is referred to as a chemical bond. Atoms trade or exchange valence electrons to create bonds.

Thus the correct option is 4.

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Answer:

Electrons

Explanation:

Answer:

endoskeleton i think

Explanation:

the answer is mitosis

Answer:

It would cause scattering of light and absorbance measurement is going to be reported as too large

Explanation:

The curvette was not inserted correctly into the spectrometer. The effect that this would have on measured absorbance is that it would cause scattering of light.

Failing to line the curvette correctly would cause light to scatter, the light reaching the photodetector would be less. This less light would then be interpreted as more light being absorbed. This would end up making the absorbance value to be read as too large.

Answer:

178.35g

Explanation:

Molarity of a solution can be calculated using the formula:

Molarity = number of moles ÷ volume

Based on the information provided in this question, molarity (M) of the solution = 1.50 M, volume = 725 mL = 725/1000 = 0.725L, n = ?

1.50 = n / 0.725

n = 1.50 × 0.725

n = 1.0875mol

Molar mass of Na3PO4

23(3) + 31 + 16(4)

= 69 + 31 + 64

= 164g/mol

Mole = mass ÷ molar mass

1.0875 = mass/164

mass = 178.35g

Answer: Density of methane is 0.92 g/L

Explanation:

The relation between density and molar mass is :

[tex]d=\frac{PM}{RT}[/tex]

where , d = density

P = pressure = 910 torr = 1.20 atm     (760 torr=1atm)

M = molar mass = 16 g/mol ( for methane)

R = gas constant  = [tex]0.0821Latm/Kmol[/tex]

T = temperature = 255 K

Putting the values :

[tex]d=\frac{1.20atm\times 16g/mol}{0.0821Latm/Kmol\times 255K}=0.92g/L[/tex]

Thus density of methane is 0.92 g/L

Answer:

liquid oxygen is highly flammable

Explanation:

near any source of heat. liquid oxygen can explode to flames thus being hazardous

Answer:

A. hamper

Explanation:

i did this question before.

Answer:

Improve

Explanation:

They improved Washington's rank so that he could rise to the top.

Answer: 0.125 moles F2

Explanation: 1.5x1023 atoms of F = 0.75x10^23 molecules F2

moles F2 = 0.75x10^23/avogadro number = 0.125 moles

There are 0.25 moles in 1.5 x [tex]10^{23}[/tex]  atoms of fluorine.

Given,

In one mole we have,

6.02 x [tex]10^{23}[/tex] atoms.

1 mole = 6.02 x [tex]10^{23}[/tex] atoms

Find the number of moles in 1.5 x [tex]10^{23}[/tex] atoms of fluorine.

We have,

1 mole = 6.02 x [tex]10^{23}[/tex] atoms

Multiply  1.5 x [tex]10^{23}[/tex] / 6.02 x [tex]10^{23}[/tex] on both sides

1.5 x [tex]10^{23}[/tex] / 6.02 x [tex]10^{23}[/tex] x 1 mole = 1.5 x [tex]10^{23}[/tex] / 6.02 x [tex]10^{23}[/tex] x 6.02 x [tex]10^{23}[/tex] atoms

1.5/6.02 mole = 1.5 x [tex]10^{23}[/tex]  atoms

0.25 moles = 1.5 x [tex]10^{23}[/tex]  atoms.

Thus there are 0.25 moles in 1.5 x [tex]10^{23}[/tex]  atoms of fluorine.

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Answer:

negative

Explanation:

18 negative

19 neutral

10 positive

there are are more negative

Answer: I'm not sure if you have a selection of choice but I think it's A. Female deer have no need for antlers.

Explanation: I mean they don't.. Even if the Male are older that doesn't stop a female deer from growing antlers.. Just flimsy one's I guess.

In an ecosystem, as the growth of antlers is controlled by genes male  male whitetail deer grow antlers but females seldom grow antlers.

Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.

Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.

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Answer:

The periodic table helps organize all the elements found in the world and tells a great deal of information on each of the elements such as their atomic mass, symbol, atomic number, and more. It even is organized into groups (columns) and periods (rows). The elements in the same group mostly have similar chemical properties. In short, the periodic table is a list of the elements that make up the world around you.

Explanation:

Answer:

Electron

Explanation:

Firework mixture is made up with potassium nitrate and other toxic chemicals. They produce harmful wastes to the atmosphere. If they are contaminated, they make release very dangerous explosives by unwanted reactions.

Explosives are chemicals releasing lot of heat energy to the surrounding upon  decomposition. Nitrogen compounds, hydrogen etc are explosive and they will explode in air or water.

Chemicals have to handled carefully and stored as per the conditions based on their chemical and physical properties. Some of them may easily corrode. Some may rapidly reacts with water or air and some may explode in air.

Explosive chemicals causes atmospheric pollution as well as health risk by releasing hazardous chemicals. If they are contaminated then there may occur some unwanted reaction and it will make the risk intense by producing toxic gases.

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Answer:

Among these statements B is the correct answer.