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A bent molecule containing two hydrogens and one oxygen is known to exist in three phases on earthWhat is the name of this substance

Answer:

el ejercicio físico ayuda a gente a perder peso y reduce el riesgo de desarrollar algunas enfermedades. el ejercicio físico regular el reducen los riesgos de ciertas enfermedades como obesidad, diabetes tipo 2 e hipertensión el ejercicio físico puede ayudar a mantener el cuerpo en un peso saludable pero a veces algunos tienen enfermedades al corazón o asma y les afecta a ser demasiado práctica esa actividad

Answer:

Yes it is hard. For some of us. I already gave up, but now hes coming back. Id say sometimes its useless to get his attention if he never even pays attention to you anyways. It sucks because its so hard to get then to notice you for once.

Explanation:

Answer:

They are electrical conductors because their delocalised electrons carry electrical charge through the metal.

Explanation:

for the second ques

not sure...

Answer:

B) Crust

Explanation:

It's the farthest layer from the core listed.

Answer:

B) Crust

Explanation: it is the lowest from the center of the earth.

Answer:

False

Explanation:

False : It is better they are closer together

The RF ( retention factor  ) is calculated with this formula

= distance travelled / distance travelled by solvent

And the larger the RF factor of a compound the less polar the compound ( i.e. it will not stick to the stationary phase ) hence it is better the RF values of the components to be closer

Answer:

True

Explanation:

The resulting Rf factor, which has no units, is dependent upon the specific stationary and mobile phase used. Chromatogram results are considered to have better resolution if the Rf values of the components being separated are farther apart (e.g. 0.3 and 0.7) rather than closer together (e.g. 0.4 and 0.5). The distance the compound moves relative to the distance the solvent (or mobile phase or eluent) moves is a characteristic of that compound. (where Rf is equal to distance compound moved divided by solvent front distance)

Answer:

2.11

Explanation:

1/0.473 = 2.11

Answer:

I think its it is A

Explanation:

Rust is red in colour, falls off in flakes, and forms when iron is wet. By process of elimination, it must be B.\

can i get brainly

Answer:

where are the answer choices

Answer:

[tex]100 \times 13.5 = ikw n bahaa[/tex]

IKAW na mag tayms

Answer:

8-)

Explanation:

Baking powder is a dry chemical leavening agent, a mixture of a carbonate or bicarbonate and a weak acid. The base and acid are prevented from reacting prematurely by the inclusion of a buffer such as cornstarch. Baking powder is used to increase the volume and lighten the texture of baked goods

Answer:

K2Cr2O7

Explanation:

Solubility refers to the amount of substance that dissolves in a given mass or volume of solvent. There are several units of solubility applicable in different areas.

Solubility is dependent on temperature. The solubility curve is a graphical representation of the dependence of solubility on temperature for different chemical species.

If we study the solubility curve closely, we will see that K2Cr2O7 has the highest solubility at 100°C. This means that if the trends continue, this substance will also have the highest solubility at 120°C.

Answer: c

Explanation:

Answer:

These defensive driving skills can help you avoid the dangers caused by other ... being aware of the cars around you, checking your mirrors — the list goes on. ... It's not just teen drivers who are at fault: People who have been driving for a while ... car and a slow-moving truck in the same lane, it's a pretty sure bet the driver ...

Explanation:

Magnesium oxide : MgO

Calcium bicarbonate:  Ca(HCO3)2

aluminum carbonate: Al2(CO3)3 or C3Al2O9

Answer:

___Exothermic Reactions_____can release different forms of energy such as electricity or light, in addition to the release of heat energy. *

Answer:

9.598 × 10⁻¹¹ m

0.09598 nm

9.598 × 10⁻⁹ cm

Explanation:

Step 1: Given data

Distance between oxygen and hydrogen in water (d): 95.98 pm

Step 2: Convert "d" to meters

We will use the conversion factor 1 m = 10¹² pm.

95.98 pm × 1 m/10¹² pm = 9.598 × 10⁻¹¹ m

Step 3: Convert "d" to nanometers

We will use the conversion factor 1 m = 10⁹ nm.

9.598 × 10⁻¹¹ m × 10⁹ nm/1 m = 0.09598 nm

Step 4: Convert "d" to centimeters

We will use the conversion factor 1 m = 100 cm.

9.598 × 10⁻¹¹ m × 100 cm/1 m = 9.598 × 10⁻⁹ cm

Answer:

Molarity of our solution= 0.46=0.5

Explanation:

When diluting a solution we can use the formula: 1 1 = 2 2

= M= Molarity of the solution

=V=volumes

On the left side, we'll put what we know/already have and on the right side of the formula we'll put down what we want to dilute it to.

Let's plug in what we already know.

(0.700M)(2L) = (M2)(3L)

Solve for M2 by dividing both sides by 3 so M2 will be by itself.

(0.700M)(2L)/(3L) = M2

M2= 0.46, we can round it up to 0.5

Answer:

[tex]T_f=57.3\°C[/tex]

Explanation:

Hello there!

In this case, for this calorimetry problem, it is possible to realize that the hot water at 87.6 °C is cooled down whereas the cold water at 34.5 °C is heated up, according to:

[tex]Q_{cold}=-Q_{hot}[/tex]

Which in terms of mass, specific heat (cancelled out because they have the same value for being water) and temperature difference, is:

[tex]m_{cold}C_{cold}(T_f-T_{cold})=-m_{hot}C_{hot}(T_f-T_{hot})\\\\m_{cold}(T_f-T_{cold})=-m_{hot}(T_f-T_{hot})[/tex]

Thus, solving for the final temperature, we obtain:

[tex]T_f=\frac{m_{cold}T_{cold}+m_{hot}T_{hot}}{m_{cold}+m_{hot}}[/tex]

Then, we plug in to obtain:

[tex]T_f=\frac{200g*34.5\°C+150g*87.6\C}{200g+150g}\\\\T_f=57.3\°C[/tex]

Best regards!

Answer:

3.64M is the molar concentration of the solution

Explanation:

Molarity (Molar concentration, M) is an unit of concentration widely used in chemistry defined as the ratio between the moles of solute (In this case, KCl) and the volume of the solution in liters.

As you can see, the moles of KCl are 2.21 mol, and the volume of the solution is 0.6068L. The molarity is:

2.21mol / 0.6068L =

Answer:

Ocean waves are longitudinal waves, Sound waves are transverse waves. Ocean waves are electromagnetic waves, Sound waves are mechanical waves. A Sound wave of over 20,000 Cycles per Seconds is inaudible to Humans.

Explanation:

Answer:

Ocean waves are mechanical waves while Sound waves are electromagnetic waves

Explanation:

Explanation:

To calculate the heat released in the reaction, we use the formula-

Q = m×c×Δt

Where

Q - The heat energy

m - the mass of the object/substance being heated

c - the specific heat of the object/substance being heated

Δt -  the change in temperature in °C

Answer:

because its sharper...

Answer:

Explanation: The goal of every country should be to produce more materials and goods

Answer:

Explanation:

Moles of Pb(NO3)2 =  mass/molecular mass

= 50.0 grams/(207.20*1 + 14.01*2 + 16*6)

= 50.0 grams/331.22

= 0.15 moles

Moles of NaI

= 30/(22.99+126.9)

= 30/149.89

= 0.2 Moles

A. NaI is less 2x Pb(NO3)2 so NaI is the limiting reagent.

B. The ratio is 1 to 2 so there is 0.15 - 0.2/2 = 0.05 mole

or 16.78 grams of Pb(NO3)2 left.

C. As NaI is limiting, only 0.2 Moles of NaNO3 is formed.

Mass =  Moles * Molecular Mass

Molecular Mass of NaNO3 can be calculated as:  

Na - 22.99

N - 14.01

O - 3(16) = 48

23+14+48 = 85gram / mole

Thus, Mass =  0.2*85  = 17 gram of NaNO3

Mass is conserved in a chemical reaction.

Mass of PbI2 can be calculated as:

50+30-16.78-17

= 46.3 gram of PbI2

Mass =  

12.75

Thus, 12.75g of Sodium Nitrate can be formed

Answer:

Explanation:

Pb(NO3)2 (aq) + 2 NaI (aq) --> PbI2 (s) + 2 NaNO3 (aq)

MM for each compound -

Pb(NO3): 207 + 14x2 + 16x3x2 = 331

PI2: 207 + 127x2 = 461

NaI: 23 + 127 = 150

NaNO3: 23 + 14 + 16x3 = 85

Moles of Pb(NO3)2 = 50/331 = 0.15

Moles of NaI = 30/150 = 0.2

Ratio of moles is 1:2

So NaI is limiting

Limited to 0.2/2 = 0.1 mole of Pb(NO3)2

Excess = 0.15 - 0.1 = 0.05 mole

Mass remains = 0.05x331 = 16.55 grams

Moles of NaNO3 formed = Moles of NaI reacted = 0.2

Mass = 0.2x85 = 17 grams

Moles of PbI2 formed = Moles of Pb(NO3)2 reacted = 0.1

Mass = 0.1x461 = 46.1 grams

If 12 grams of NaNO3 actually formed in the reaction,

percent yield = 12/17x100% = 70.6%

Answer:

hydrogen oxygen or nitrogen

Answer:

synthesis reaction

Explanation:

synthesis reaction where reactants unite to form a single product.

Answer:

population - A group of organisms of the same species living in the same area at the same time, and which are capable of interbreeding. community - A group of populations living and interacting with each other in a common habitat.

Explanation:

The competitive exclusion principle tells us that two species can't have exactly the same niche in a habitat and stably coexist. That's because species with identical niches also have identical needs, which means they would compete for precisely the same resources.

Answer:

78 kPa

Explanation:

The total pressure is the sum of the partial pressures:

240 = Pa + Pb + Pc

240 = 107 + 55 + Pc

Pc = 78 kPa

Answer:

78 kPa

Explanation:

Answer:

[tex]2H_2 + O_2 -> 2 H_2 O[/tex]