any object that travels around another object in space is a (n) -

Answer:

0.032 M

Explanation:

pH denotes the acidity or alkalinity of an aqueous solution.  pH stands for potential hydrogen. The letter “p” denotes potential and the letter “H” denotes for hydrogen. A pH number varies from 0 to 14 depending upon on how acidic or alkaline a liquid is. Any aqueous solution that has pH above 7 is alkaline and any aqueous solution that has pH below 7 is acidic.

ph of phosphoric acid = 1.5

pH = -log[[tex]H_3O^+[/tex]]

1.5 = -log[[tex]H_3O^+[/tex]]

-1.5 = log[[tex]H_3O^+[/tex]]

[tex][H_3O^+]=10^{-1.5}[/tex] = 0.032 M

Answer:

11.33g of hydrogen

Explanation:

We need to apply the formulae;

Nt/No= (1/2)^t/t1/2

Where;

Nt= mass of hydrogen remaining after a time t (the unknown)

No= mass of hydrogen initially present = 2900g

t= time taken for Nt mass of hydrogen to remain = 19600 years

t1/2= half-life of hydrogen= 2450 years

Substituting values;

Nt/2900= (1/2)^19600/2450

Nt/2900= (1/2)^8

Nt/2900= 1/256

256Nt= 2900

Nt= 2900/256

Nt= 11.33g of hydrogen

Therefore, 11.33g of hydrogen is left after 19600years.

Answer:

IVA: nonmetal/other metals VIIA:halogens VIII: Nobel Gases

Explanation:makes sense

Answer:

3.33 atm

Explanation:

P1/T1 = P2/T2

5 atm/ 300 K = P2 /200K

P2 = 5atm*200 K/300 K

P2 = 3.33 atm

Answer:

to send rovers to the Moon.

Explanation:

Apollo refers to the project led by The National Aeronautics and Space Administration (NASA) to study the environment of the Moon in the 1960s and 1970s. Project Apollo 's objectives went beyond landing humans on the moon and getting them back safely to Earth. They included attempting to establish technology to meet other national space interests, to carry out a plan of scientific observation of the Moon, enhancing human capacity to work in the lunar climate, etc.

Answer:

man this was the ONLY question i missed i would have have a 100% accuracy!

Explanation:

Answer:

why cant I see the picture on my screen

Answer:

213.4°C.

Explanation:

Data obtained from the question:

Initial pressure (P1) = 5.1atm

Initial temperature (T1) = 45°C = 45°C + 273 = 318K

Final pressure (P2) = 7.8atm

Final temperature (T2) =..?

The new temperature can be obtained as follow:

P1/T1 = P2 /T2

5.1/318 = 7.8/T2

Cross multiply

5.1 x T2 = 318 x 7. 8

Divide both side by 5.1

T2 = 318 x 7. 8 /5.1

T2 = 486.4K

Finally, we shall convert 486.4K to celsius temperature. This can be done as follow:

T(°C) = T(K) – 273

T(K) = 486.4K

T(°C) = 486.4 – 273

T(°C) = 213.4°C.

Therefore, the new temperature is 213.4°C

Answer: D. They turn red litmus paper blue and taste bitter.

Explanation:

Acids are those substances which either donates hydrogen ions when dissolved in water.  They have pH ranging from 1 to 6.9. They are sour in taste. They dissolve metals to give hydrogen gas. They turn blue litmus red.

Bases are those substances which either donates hydroxide ions when dissolved in water or donates a pair of electrons.  They have pH ranging from 7.1 to 14. They are bitter in taste. They are slippery in nature. They turn red litmus blue.

Answer:Mn+Ni2+-->Mn2+ + Ni

Explanation:

Castle Learning said it

How do you determine if the reaction is spontaneous?

If ΔH is negative, and –TΔS positive, the reaction will be spontaneous at low temperatures (decreasing the magnitude of the entropy term).

What is the meaning of spontaneous reaction?

When both of these conditions are met, the reaction occurs naturally. A spontaneous reaction is a reaction that favors the formation of products at the conditions under which the reaction is occurring.

Learn more about spontaneous reaction here : brainly.com/question/24376583

#SPJ2

Answer:

4.41 × 10²⁴ molecules SO₂

General Formulas and Concepts:

Atomic Structure

Stoichiometry

Explanation:

Step 1: Define

[Given] 7.32 moles SO₂

[Solve] molecules SO₂

Step 2: Identify Conversions

Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

Step 3: Convert

Step 4: Check

Follow sig fig rules and round. We are given 3 sig figs.

4.4081 × 10²⁴ molecules SO₂ ≈ 4.41 × 10²⁴ molecules SO₂

Answer:

4.41 × 10²⁴ molecules SO₂

Explanation:

The Person is right

Answer:

C

Explanation:

95 > 7

95 > 75

The answer is C.

Answer:

Troposphere

Explanation:

The troposphere is the lowest layer of Earth's atmosphere that extends from under the stratosphere down to the surface of the earth. Nearly all weather condition takes place in the troposphere. The troposphere contains about 75% of the atmosphere's mass and 99% of the total mass of water vapour and aerosols in the atmosphere.

Answer: Pressure decreases.

Explanation:

Atmospheric pressure is termed as the  downward force applied by the weight of air against a particular area on Earth's surface.  the Standard atmospheric pressure is determined  by weighing the column of air occupying  1 square inch on Earth's surface which begins  at sea level and moves  upward to the uppermost layer of the atmosphere

Measuring the Atmospheric pressure from sea level to the stratosphere,the second layer of the atmosphere which contains the most of the ozone gas show that the pressure decreases

Answer:

Ocean

Explanation:

The maximum salinity is about 35 parts per mille. Among other terms, around 3.5 per cent of seawater weight is produced from salts dissolved.

So a lot of salt water in oceans

Hope this helps.

Answer:

b)

Explanation:

ocean is a containing salt water

Answer:

                    CH2- CH3

                     |

CH3 - CH2 - C        -     CH - CH2 - CH2 - CH3

                     |                 |

                    CH3           CH3

Explanation:

Heptane

CH3 - CH2 - CH2 - CH2 - CH2 - CH2 - CH3

3 ethyl 3, 4 dimethylheptane

                    CH2- CH3

                     |

CH3 - CH2 - C        -     CH - CH2 - CH2 - CH3

                     |                 |

                    CH3           CH3

Answer:

Wavelength of sound waves[tex]\ambda = 386[/tex] millimetres

Explanation:

The speed of any wave is equal to the product of its wavelength and frequency.

This can be represented mathematically as

[tex]V = f* \lambda[/tex]

Where

V is the speed of sound waves

f is the frequency of sound waves

and

[tex]\lambda[/tex] is the wavelength of the sound waves.

Substituting the given values in above equation we get -

[tex]340 = f * \lambda\\\lambda = \frac{340}{880} \\[/tex]

[tex]\lambda = 0.386[/tex] meters

[tex]\ambda = 386[/tex] millimetres

Answer:

its height relative to some reference point, its mass, and the strength of the gravitational field

Explanation:

Gravitational energy is the potential energy associated with gravitational force, such as elevating objects against the Earth’s gravity. The potential energy due to elevated positions is called gravitational potential energy.

The factors that affect an object’s gravitational potential energy are the following; its height relative to some reference point, its mass, and the strength of the gravitational field it is in. For instance, consider a wallet lying on a table, it has less gravitational potential energy than the same wallet lying on top of a taller cupboard, and yet lesser gravitational potential energy than a heavier wallet lying on the same table.

If an object lies at a certain height above the Moon’s surface, it has less gravitational potential energy than the same object lying at the same height above the Earth’s surface because the Moon’s gravitational force is weaker.

Answer:

because it's way to confusing and something that gets harder

Answer:

0.264 mol/L

Explanation:

Data obtained from the question includes:

Volume = 5.74L

Mass of FeCl3 = 246 g

Molarity =?

Next, we shall determine the number of mole in 246g of FeCl3.

This is illustrated below:

Mass of FeCl3 = 246g

Molar mass of FeCl3 = 56 + (35.5x3) = 162.5g/mol

Number of mole of FeCl3 =..?

Mole = Mass /Molar Mass

Number of mole of FeCl3 = 246/162.5

Number of mole of FeCl3 = 1.514 mol

Now, we can obtain the molarity of the solution as follow:

Molarity = mole /Volume

Volume = 5.74L

Mole of FeCl3 = 1.514 mol

Molarity = 1.514/5.74

Molarity = 0.264 mol/L

Answer:0.58 atm

Explanation:see attached photo

Answer:

[tex]P=0.583atm[/tex]

Explanation:

Hello,

In this case, by using the ideal gas equation:

[tex]PV=nRT[/tex]

We can compute the pressure as shown below, considering the given data and absolute temperature:

[tex]P=\frac{nRT}{V}=\frac{0.325mol*0.082\frac{atm*L}{mol*K}*(35+273)K}{14.08L}\\ \\P=0.583atm[/tex]

Best regards.

Answer:

D. a variation of a gene

Answer:

Healthcare system is one of the most important in any country’s economy.

Health care system Inputs include Medication, patients, locations

Outputs: Treating injured or sick people, taking care of people's health

Side effects: Lack of medication/drugs or no right medication, wrong diagnosis or prescription.

Answer:

number 3.

Explanation:

Answer:

3

Explanation:

Answer:

Atoms are smaller than molecules, as atoms are the building blocks of matter.

Explanation:

Answer: I believe the answer is B. Sorry if i'm wrong

Explanation:

Answer:

1. A

2. B

3. A

4. B

5. B

6.C

7. B

8. A

Explanation:

SnO₂ + H₂ + energy → Sn + H₂0

The reaction is between Tin(iv) oxide and hydrogen gas to form tin and water molecules.

Notice the reaction is not balance therefore let us balance the equation. To balance the equation the number of atoms on both side (reactant and product)of the equation must be equal.

SnO₂ +2H₂ → Sn + 2H₂0

The equation is balanced .  SnO₂  has coefficient of 1 , H₂ has coefficient of 2, Sn has coefficient of 1 and H₂0 has coefficient of 2.

Q5

SnO₂ + 2H₂→ Sn + 2H₂0

1 moles of SnO₂ will balance the equation

Q6

The reactant is on the left side of the chemical equation. Therefore the reactants are Tin(iv) oxide and hydrogen molecules (SnO₂ and H₂)

Q7

The product is on the right side of the chemical equations .Therefore, the products are Tin and water molecules(Sn and H₂0).

Q8

The reaction is an endothermic reaction because it absorb heat from it environment.

Answer:

123.5 kPa

Explanation:

P2=P1T2/T1

You can check this by knowing that P and T at constant V have a proportional relationship. Hence, this is correct.

Answer:

is exothermic

Explanation:

releases energy to the atmosphere

Answer:

1. SnO2 = 1; H2 = 2; Sn = 1; H2O = 2

2. I mole of SnO2 is required to react with 2 moles of H2 to produce 1 mole of Sn and 2 moles of H20.

The balanced equation represents 1 mole of SnO2

3. Total mass of reactants and products are each 154.71g respectively

Explanation:

1. According to the law of conservation of mass, the total mass of reactants in a chemical reaction is equal to the mass of products.

Therefore, a balanced chemical equation has equal number of moles of each atom on the reactants side and on the product side. The balanced chemical equation for the reaction above will be:

Sn02 + 2H2 + Energy -----> Sn + 2H2O

Sn has 1 mole of atoms on both sides

O has 2 moles of atoms on both sides

H has 4 miles of atoms on both sides.

2. According to the balanced chemical equation above,

1 mole of SnO2 reacts with 2 moles of H2 to produce 1 mole of An and 2 moles of H20.

This balanced equation represents 1 mole of SnO2.

3. The atomic masses of Sn, O and H are 118.71g, 16g and 1g respectively.

Therefore, the molar masses of the reactants and products are;

SnO2 = 118.71 + 16 * 2 = 150.72g

H2 = 2 *1 = 2g

H2O = 2 * 1 + 16 = 18g

Total mass of reactants = 150.71g + 2 * 2g = 154.72g

Total mass of products = 118.71 + 2 * 18g = 154.71g