Hippos spend most of their time in rivers, but they come out of the water to eat grass. Right now, it's the middle of the night. The sun is not shining, and the hippos are not eating. What is happening to the carbon in the air around the hippos and the grass nearby?

Answer:

See Explanation

Explanation:

1) Let us recall that;

Mass number = number of protons + number of neutrons

Where;

Number of protons = ?

Number of neutrons =20

Mass number =39

Number of protons = mass number - number of neutrons

Mass of protons =39 - 20= 19 protons

2) Atomic number = 13

Number of neutrons =14

Then the mass number =13 +14 =27

The symbol of the element is 27X13

The number of protons= the number of electrons =13

The atomic number is the same as the proton number =13

Answer:

25.8g of NH3 can be formed

Explanation:

To solve this question we must convert the mass of each reactant to moles using molar mass. With the chemical equation we can find limiting reactant. The moles of limiting reactant are used yo find the moles of ammonia produced and its mass:

Moles NO -30.01g/mol-

45.4g * (1mol / 30.01g) = 1.51 moles

Moles H2 -Molar mass: 2.01g/mol-

12.1g * (1mol / 2.01g) = 6.02 moles

For a complete reaction of 6.02 moles of H2 are needed:

6.02mol H2 * (2mol NO / 5mol H2) = 2.41 moles NO are needed

As there are just 1.51 moles, NO is limiting reactant

Moles NH3:

1.51 moles NO * (2mol NH3 / 2mol NO) = 1.51 moles NH3

Mass NH3 -Molar mass: 17.031g/mol-

1.51 moles NH3 * (17.031g / mol) =

Answer:

D. Body of salt water that is connected to the ocean

Explanation:

An ocean is a body of salt water which covers approximately 70% of the Earth's surface. About 97% of the Earth's water is comprised of ocean and as such it is the most prominent and defined feature of the Earth. There are basically four (4) categories of an oceanic basin and these are;

1. The Pacific ocean.

2. The Artic ocean.

3. The Atlantic ocean.

4. The Indian ocean.

A sea is usually defined as a body of salt water that is connected to the ocean and are surrounded (enclosed) by land partially.

Basically, a sea is formed where a land and an ocean meet and as a result, an ocean is usually bigger than a sea.

Some examples of seas around the world are Red sea, Mediterranean sea, Sargasso sea, Caribbean sea, Baltic sea, Caspian sea, Chuckchi sea, etc.

Answer:

Yes The Anwer is D Hope This Help:)

Answer:

2 1 H

Explanation:

We must remember that a nuclear equation is only said to be balanced when the mass and charges on both sides of the nuclear reaction equation correspond.

If we look at the nuclear equation; the total mass on the right hand side is 4 units while the total charge on the right hand side is two units.

This implies that the missing particle must be 2 1 H

Answer:

During separation of substances with different boiling points, fractional distillation is used.

During separation of substances in an eutectic mixture or azeotropic mixture, steam distillation is used.

Answer:

10 electrons

Explanation:

Answer:

Mass of copper in 200 g bronze is 120 g.

Explanation:

If it is known that bronze is formed with 60% copper and 40% tin, what will be the mass of copper contained in 200 grams of bronze?

Percentage of copper in bronze = 60 %

Percentage of tin in bronze = 40 %

Mass of bronze  = 200 grams

Mass of copper in bronze = 60 % of 200 g

= 0.6 x 200 = 120 grams

Mass of copper in 200 g bronze is 120 g.  

Answer:

[HBr] = 0.0910 M

Explanation:

NaOH → Strong base

HBr → Strong acid.

This is a titration that involves a strong acid and a strong base, so the recaction is about acid base equilibrium.

Formula for titration in the equivalence point is:

mmoles of acid = mmoles of base

M . Volume of acid = M . volume of base

We replace data:

M . 36.60 mL = 0.150 M . 22.20 mL

M = (0.150 M . 22.20 mL) / 36.60 mL

M = 0.0910 mol/L

Answer:

mitochondria is responsible for energy

Answer:

[tex]Kc=\frac{(Cu2)(Ag)^2}{(cu)(Ag)^2}[/tex]

Explanation:

because it is products / reactants  

Hope this helps:)

Answer:

I think it is A

Explanation:

A.They study how to make plants produce certain chemicals

ANSWER - 6 MOLES OF IRON

Fe2O3(s) + 3H2(g) → 2Fe(s) + 3H2O(1)

One moles of Fe2O3 forming 2 moles of Fe

3 moles of Fe2O3 will form 2×3 = 6 moles of iron

Answer:

B. 96.12 g

Explanation:

To solve this question we must convert each reactant to moles. Using the balanced equation we can find limiting reactant. With moles of limiting reactant we can find the moles of methanol and its mass:

Moles CO -Molar mass: 28.01g/mol-

140.1g CO * (1mol / 28.01g) = 5.0 moles CO

Moles H2 -Molar mass: 2.01g/mol-

12.12g * (1mol / 2.01g) = 6.03 moles H2

For a complete reaction of 5.0 moles of CO are required:

5.0moles CO * (2mol H2 / 1mol CO) = 10.0 moles of H2 are required

As there are just 6.03 moles, H2 is limiting reactant.

The moles of methanol produced are:

6.03 moles H2 * (1mol CH3OH / 2mol H2) = 3.015 moles CH2OH

Mass CH3OH -Molar mass32.04g/mol-:

3.015 moles CH2OH * (32.04g/mol) =

96.6g CH3OH ≈ B. 96.12 g

Answer:

Explanation:

You'r answer should be D

Answer:

[tex]V_2=0.5L[/tex]

Explanation:

From the question we are told that:

initial Volume [tex]V_1=2.00L[/tex]

initial Pressure [tex]P_1=1 atm[/tex]

Final  Pressure [tex]P_2=6atm[/tex]

Generally the equation for Final Volume V_2 is mathematically given by

Since Boyle's law states

 [tex]P_1V_1=P_2V_2[/tex]

 [tex]V_2=\frac{P_1V_1}{P_2}[/tex]

 [tex]V_2=\frac{2*1}{6}[/tex]

 [tex]V_2=0.5L[/tex]

tides are caused by the gravitational force of the sun and the moon

Answer:

A turbine takes the kinetic energy of a moving fluid, air in this case, and converts it to a rotary motion.

Explanation:

Answer:

A- 286.3L

Explanation:

Using the ideal gas law equation;

PV = nRT

Where;

P = pressure (atm)

V = volume (L)

n = number of moles (mol)

R = gas law constant (0.0821 Latm/molK)

T = temperature (K)

According to the information given in this question;

P = 1.14atm

V = ?

n = 15moles

T = 265K

Using PV = nRT

V = nRT ÷ P

V = (15 × 0.0821 × 265) ÷ (1.14)

V = 326.35 ÷ 1.14

V = 286.27 L

V = 286.3L

Answer:

the answer is the D, it has a full octet

Answer:

an anion

Explanation:

since it lost a proton..it now has 3 protons and four electrons and possesses a minus charge since it is no longer neutrally charged..this minus charge makes it an anion

Answer:

TRUE

Explanation:

Answer:

In physics, sound is a vibration that propagates as an acoustic wave, through a transmission medium such as a gas, liquid or solid. In human physiology and psychology, sound is the reception of such waves and their perception by the brain.

Explanation:

this is what i found hope it helps :)

Answer:

Sound is a form of energy which is caused due to the vibration of an object.

Explanation:

hope the picture above help u understand I did it in step so it would be easier to understand:)

Answer:

The Peruvian area of the jungle, living in the high trees is the monkey's habitat.

(I'm not fully sure what a niche is) but:

Feeding on hazelnuts and scavenging for food along the jungle floor is the monkey's niche.

Explanation:

I really hope I was able to help!

Good luck and have a great day :)

Answer:

This statement is true.........

Answer:

i think true

Explanation:

Answer:

they become water vapor and after that, they become a type of precipitation

Answer:

the volume decreases and the pressure increases.

Answer:

When you first set the water balloon on top of the jar, the air pressure outside the jar and the air pressure inside the jar are the same. ... So now there is less air, less stuff, in the jar