Each element has a unique name. How else can
an element be represented?
A. by its mass
B. by its state of matter
C. by its chemical symbol
D. by an identification number

Answer:

8.54g

Explanation:

we know that: n=m/Mm

where:

rearrange for m: m= n x Mm

m= 0.0490mol x 174.259g/mol

m= 8.54g

Answer:

c

Explanation:

C represents C. Rock formed by heat and pressure.

Metamorphic rocks are often squished, smeared out, and folded. regardless of those uncomfortable conditions, metamorphic rocks do not get warm sufficient to melt, or they would end up igneous rocks! common Metamorphic Rocks: common metamorphic rocks include phyllite, schist, gneiss, quartzite, and marble.

Metamorphic rock is any of a class of rocks that result from the alteration of preexisting rocks in reaction to changing environmental situations, such as variations in temperature, strain, and mechanical stress, and the addition or subtraction of chemical components.

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Answer:

Boiling

Explanation:

Answer:

ExpC

H

4

+  

2

O

2

→

C

O

2

+  

2

H

2

O

This is the balanced reaction equation for the combustion of methane.

Explanation:

The Law of Conservation of Mass basically states that matter can neither be created nor destroyed. As such, we must be able to show this in our chemical reaction equations.

If you look at the equation above, you'll see an arrow that separates the reaction equation into two parts. This represents the direction of the reaction.

To the left of the arrow, we have our reactants.

To the right of the arrow, we have our products.

The quantity of each individual element in the left must equal the quantity of each individual element in the right.

So if you look below, you'll see the unbalanced equation, and I'll try to explain how to balance the reaction.

C

H

4

+  

O

2

→

C

O

2

+  

H

2

O

Our reactants in this equation are  

C

H

4

and  

O

2

.

Our next step is to break these down into individual atoms.

We have:

1 C atom, 4 H atoms & 2 O atoms.

If you're confused by this, look to see the little number to the bottom right of each element, the subscript, and it tells you how many of each atom are in the molecule. Make sense?

Now we look to the other side of the equation.

Here we see our products are  

C

O

2

+  

H

2

O

Again, we break these down into individual atoms again.

We have:

1 C atom, 2 H atom, 3 O atom

"The characteristics of electro-magnetic travel in straight lines and have the ability to bounce off objects. Traveling at the speed of light can bend around moving objects due to the interplay of an electric and magnetic field."

What is electromagnetic wave?

Electromagnetic waves, or EM waves, are formed when an electric field as well as a magnetic field vibrate together. EM waves, in other terms, are magnetic and electric fields that oscillate.

What is Electromagnetic radiation?

Electromagnetic radiation is made up of electromagnetic field waves that travel over space and convey electromagnetic radiant energy. Radio waves, microwaves, infrared, light, ultraviolet, X-rays, and gamma rays are all examples. The electromagnetic spectrum includes all of these wavelengths.

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Answer:

SEE EXPLANATION

Explanation:

We have the mole ratio as; 94 : 4.0 : 1.5 : 0.50

This implies that the total number of natural gas is; 94 + 4.0 + 1.5 + 0.50 = 100 moles

Recall that partial pressure = mole fraction * total pressure

For CH4 = 94/100 * 1.48 atm = 1.39 atm

For C2H6 = 4/100 * 1.48 atm = 0.0592 atm

For C3H8 = 1.5/100 * 1.48 atm = 0.0222 atm

For C4H10 = 0.5/100 * 1.48 atm = 0.0074 atm

Answer:

Gold

hope this helps :)

Answer: Gold

Explanation: Gold is called a heavy metal because of its high density, which comes from the fact that each of its atoms is individually very heavy. ... In contrast, gold atoms slide past each other relatively easily, which makes the metal soft and malleable.

Explanation:

it can suddenly increase when more and more people have babies and the infant rate goes up. and how it might affect the ecosystem is the pollution that people give off.

Answer:

Explanation:

Due to less predators in the Savannah/habitat, the population could unexpectedly grow. This will have an impact on the environment because it will give rise to more prey as there will be fewer predators. If too many herbivores are present on one feeding site, competition for food will occur. If there are more plants in an area than normal, it can increase the population of animals that consume the plant. If the population of one animal rises, the population of animals that consume that animal could also rise.

Population growth isn't always good. A population may often grow too big to sustain the climate. Other modifications in limiting variables can cause a population to decline. The population will decrease if a population becomes diseased, and the population of animals that consume the diseased animals will decrease as well. Populations in nature typically balance themselves. Sometimes, they can't always restore a natural balance as man affects populations.

Answer:

The ratio of f at the higher temperature to f at the lower temperature is 5.356

Explanation:

Given;

activation energy, Ea = 185 kJ/mol = 185,000 J/mol

final temperature, T₂ = 525 K

initial temperature, T₁ = 505 k

Apply Arrhenius equation;

[tex]Log(\frac{f_2}{f_1} ) = \frac{E_a}{2.303 \times R} [\frac{1}{T_1} -\frac{1}{T_2} ][/tex]

Where;

[tex]\frac{f_2}{f_1}[/tex]  is the ratio of f at the higher temperature to f at the lower temperature

R is gas constant = 8.314 J/mole.K

[tex]Log(\frac{f_2}{f_1} ) = \frac{E_a}{2.303 \times R} [\frac{1}{T_1} -\frac{1}{T_2} ]\\\\Log(\frac{f_2}{f_1} ) = \frac{185,000}{2.303 \times 8.314} [\frac{1}{505} -\frac{1}{525} ]\\\\Log(\frac{f_2}{f_1} ) = 0.7289\\\\\frac{f_2}{f_1} = 10^{0.7289}\\\\\frac{f_2}{f_1} = 5.356[/tex]

Therefore, the ratio of f at the higher temperature to f at the lower temperature is 5.356

Answer:

T2+500k - 273 = 223 *C

Explanation:

Answer:

Diamond - E

Sugar- C

Milk - M

Iron- E

Air- M

Sulfuric Acid- C

Gasoline - M

Electricity- X

Krypton- E

Bismuth - E

Uranium - E

Kool-Aid -M

Water - C

Alcohol - C

Pail of Garbage - M

Ammonia - C

Salt - C

Energy - X

Gold - E

Wood - M

Bronze - M

Ink - M

Pizza - M

Dry Ice - C

Baking Soda - C

Explanation:

An element is the smallest part of a substance that is capable of independent existence. An element cannot be broken down into any other substance. Krypton, Bismuth etc are all elements.

A compound is a combination of two or more elements which are chemically combined together e.g NH3, CO2 etc.

A mixture is any combination of substances that are not chemically combined together. E.g Pizza, milk etc

Answer:

0.02

Explanation:

Molecular mass of water= 2×1+1×16=18g

=2×1+1×16=18g

For 90g178.2g water nₐ  =5

Molecular mass of glucose  6×12+12×1+6×16=180g

For 18g glucose nb =0.1

Now,  X  B  =  0.1 / 0.1 + 5=0.0196 ~0.02

Answer:

A TRUEEEEEEEE

Explanation:

Answer: It takes more energy to increase the temperature of water than to increase the temperature of oil.

Explanation:

yes

Answer:

Greater

Explanation:

This is because , 4 g of NH4NO3(s) contains more number of moles than 2 g of NH4NO3(s). Since the amount of heat (q, in J) released or absorbed for the dissolution is measured in kJ/mol, the higher the number of moles , the higher the amount of energy released. Since 4 g of NH4NO3(s) contains more number of moles than 2 g of NH4NO3(s), it will thus release or absorb more heat. So, the amount of heat is greater.

Since 4 g of NH4NO3(s) contains more moles than 2 g of NH4NO3(s), it will thus absorb more heat showing that the amount of heat is greater.

From the given information, we are to determine whether the amount of heat released or absorbed is greater or lesser.

Since 4 g of NH4NO3(s) contains more moles than 2 g of NH4NO3(s), it will thus absorb more heat showing that the amount of heat is greater.

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Answer:

should be B

because the player has more mass than the puck

Explanation:

Answer:

Explanation:

When naming binary ionic compounds, name the non-metal anion first

When naming an ionic compound, the name of the metal comes first.

An ionic compound is composed of a metal and a nonmetal. Usually, the metal forms the positive ion while the nonmetal forms the negative ion.

When naming an ionic compound, the name of the metal is mentioned first followed by the name of the nonmetal.

For example, when naming an ionic compound that contains sodium and chlorine, the name is sodium chloride.

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Answer:

65.8mL of water and 184.2mL of the 95% EtOH stock solution must be added.

Explanation:

To solve this question we need to find hoy many times the 95% EtOH must be diluted to obtain a 70% EtOH solution. That is:

95% / 70% = 1.357 times the solution must be diluted.

If we want to make 250mL of the diluted solution, the amount of 95% that must be added is:

250mL / 1.357 times =

184.2mL of the 95% solution must be added

And of water:

250mL - 184.2mL = 65.8mL of water

Answer:

The resulting mass will be higher than expected

Explanation:

We have to keep this in mind; When magnesium is being burnt in air, two reactions are taking place. The first one is;

2Mg(s) + O2(g) ------> MgO(s)   -------1

And

3Mg(s) + N2(g) -------> Mg3N2(s)  ---------2

Now, if the steps that should be taken to convert Mg3N2 to MgO are not taken, the reaction is much quicker but a higher mass of solid is obtained than what was expected.

This higher mass of solid obtained owes to the fact that Mg3N2 from reaction 2 was not converted to MgO leading to contamination of the product.

Answer:  6100 seconds

Explanation:                                                                                                            6.1 Kiloseconds = 6100 Seconds

Converting 6.1 Kilo seconds is 6100 seconds.

The unit of time measurement used by the International System of Units (SI) is the second (s or sec). Any specific period of time that is used to measure or represent duration on a regular basis is referred to as a unit of time.

The second is the fundamental unit of time in the International System of Units and by extension. There are different units of time. They are hour, second, and minute. 1 minute is equal to 60 seconds. 60 minutes into one hour, and 24 hours equals one day.

The unit can be converted into different units as 1 ks equals 1000 seconds. To convert a unit first determine the unit, then match the unit which others, and then know the units.

Thus, the 6.1 Kilo seconds is 6100 seconds.

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Answer:

neon is the Noble gas but I have not studied this much