All living things are made up of tiny parts called…?

Vertebrates are animals with a backbone (think vertebrae). These are the creatures we usually think of when we think of animals. Vertebrates have tremendous diversity in shape, size, ability, and characteristics. They are truly wondrous creatures! The 5 classes of vertebrates are:  

Fish, Amphibians, Reptiles, Mammals, and Birds.

All invertebrates obtain food differently, some have a mouth, and others have a beak. The eight different phyla are, Porifera, Cnidarians, Platyhelminthes, Nematoda, Annelida, Echinodermata, Mollusca, and Arthropoda.

The position where a Period 4 element that is also a metal with three valence electrons would be located is: B) Position 15.

A periodic table can be defined as an organized tabular array of all the chemical elements, which is typically arranged in order of increasing atomic number or number of protons (in rows).

In Chemistry, a periodic table comprises seven (7) rows and eighteen (18) columns. Also, all chemical elements are arranged (grouped) on the periodic table based on their atomic number (number of protons).

In this context, the position where a Period 4 element that is also a metal with three valence electrons would be located is Position 15 on the periodic table.

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Answer: B) Electromagnetic waves can travel through empty space.

Explanation:

Conduction: This type of heat transfer happens when there is direct contact between the two object.  Example: heating a pan on stove.

Convection: This type of heat transfer happens when there is a movement of fluid (liquid or gas) due to the movement of hot layers to the top and cold layers to the bottom which leads to convection currents. Example: Heating of swimming pool.

Radiation: This type of heat transfer happens when there is direct transfer of energy through empty space.The electromagnetic radiation from the surface of an object which is due to the object's temperature is radiation. Example: Heating of earth's surface.

Answer:

Convex

Explanation:

8 guess not sure cause light rays should be converging to meet to their eye

Answer: 13.4

Explanation: i guessed it and got it correct on ck-12

STP is the standard pressure and temperature condition of the ideal gas. 0.13 moles of dinitrogen monoxide will be present at STP.

An ideal gas equation is a relation between the pressure, volume with moles, gas constant, and the temperature of the ideal gas. The ideal gas equation is given by,

[tex]\rm PV = nRT[/tex]

Given at STP,

Pressure = 1 atm

Volume = 300 L

Moles = ?

Gas constant =8.3144598 J per mol per Kelvin

Temperature = 273 K

Substituting values in the ideal gas equation we get:

[tex]\begin{aligned} \rm n &= \rm \dfrac{ PV}{RT}\\\\&= \dfrac{1 \times 300}{273 \times 8.314}\\\\&=0.1321\end{aligned}[/tex]

Therefore, 0.13 moles of dinitrogen monoxide are produced at STP.

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Answer:

answer us A I hope it helps u

Answer:

B. energy, but not matter

Answer:

5.06atm

Explanation:

Using the combined gas law equation;

P1V1/T1 = P2V2/T2

Where;

P1 = initial pressure (atm)

P2 = final pressure (atm)

V1 = initial volume (Litres)

V2 = final volume (Litres)

T1 = initial temperature (K)

T2 = final temperature (K)

According to the information provided in this question;

P1 = 1.34 atm

P2 = ?

V1 = 5.48 L

V2 = 1.32 L

T1 = 61 °C = 61 + 273 = 334K

T2 = 31 °C = 31 + 273 = 304K

Using P1V1/T1 = P2V2/T2

1.34 × 5.48/334 = P2 × 1.32/304

7.34/334 = 1.32P2/304

Cross multiply

334 × 1.32P2 = 304 × 7.34

440.88P2 = 2231.36

P2 = 2231.36/440.88

P2 = 5.06

The final pressure is 5.06atm

Answer:

prototype

Explanation:

don't go right to designing the original thing

Answer:

option A is correct answer of this question

hope it helps and your day will be full of happiness

The answer is A ¬ω¬

hope it helps and have good day (yes it's late and yes i do not care I'm doing it for points ×°×)

D. 0.676 moles

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Stoichiometry

Step 1: Define

[Given] 56.1 g Na₃N

[Solve] moles Na₃N

Step 2: Identify Conversions

[PT] Molar Mass of Na - 22.99 g/mol

[PT] Molar Mass of N - 14.01 g/mol

Molar Mass of Na₃N - 3(22.99) + 14.01 = 82.98 g/mol

Step 3: Convert

Step 4: Check

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

0.676067 mol Na₃N ≈ 0.676 mol Na₃N

Answer:

okokokokomokokok

Explanation:

njiuuhhhjkjnn

Answer:

i think it's C

Explanation:

Answer:

19.37g

Explanation:

1 mole CH4 gives 4 mole CO2

so 58 g gives 176 g CO2

(58/176)×58.8 g CH4 gives 58.8 g CO2

Answer:

26.795229

Explanation:

This is how much it is

Answer:

true

Explanation:

Answer:

1.306 × 10^24 formula units.

Explanation:

The chemical equation of this qkrstios as follows:

Fe + 2H2O → FeO2 + 2H2

Based on the reaction, 2 mole of H2O produces 1 mole of FeO2

Using the formula as follows;

Mole = mass/molar mass

Molar mass of H2O = 1(2) + 16 = 18g/mol

mole = 78/18

mole = 4.33moles

If 2 mole of H2O reacts to produce 1 mole of FeO2

4.33 moles of H2O will produce 4.33/2 = 2.17moles of FeO2.

To convert moles to formula units, we multiply number of moles by Avagadro number (6.02 × 10^23 units)

= 2.17 moles × 6.02 × 10^23 units

= 13.06 × 10^23

= 1.306 × 10^24 formula units.

Answer:

Hey here is your ans

Explanation:

H2SO4 is a strong acid. ... HSO4- is the conjugate base of H2SO4 but it can still give its Hydrogen away, and thus it is a weak acid as well. It's weak because it doesn't part with its hydrogen as easily as H2SO4 did

Answer: Hard

Explanation:

The upper part of the mantle is hard as it contains thick rock layers. The mantle's upper layer and the crust make up a brittle and rigid rock that's referred to as the Lithosphere.

The upper mantle starts below the Earth crust and then stops at the start of the lower mantle. We should note that the upper mantle results in the movement of the tectonic plates.

Answer: 3

Explanation:

3) both electrolytic cells and voltaic cells

The statement, that describes reduction occurs at the cathode is "both electrolytic cells and voltaic cells."

The gain of electrons is referred to as reduction. The species that is being oxidised is also known as the reducing agent or reductant, whereas the species that is being reduced is known as the oxidising agent or oxidant.

Reduction takes place at the cathode electrode whereas oxidation occurs at the anode in both galvanic and electrolytic cells, and electrons travel from the anode to the cathode.

Electrons must move toward the location of reduction since reduction is the addition of electrons. The negative charge is on the cathode of an electrolytic cell, while the positive charge is on the anode.

Hence, the correct answer is 3.

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Answer:percentage by mass

Explanation:

Answer:

D. parts per million

Explanation:

To find such small trace amounts in such a large volume as blood, you would need a smaller unit to identify the amount. ppm is the smallest unit option among the four.

Answer:

i am unsuree

Explanation:

Answer:

1 1/2 Grams

Explanation:

If one gram of Rainbowium-214 has a half-life of 20 minutes, it takes 40 minutes for all of the grams to disappear. 2 grams of Rainbowium-214 will take 1hr and 20 minutes, but we only need to keep 1g safe for 1hr. If we used 1 1/2 grams, it would last a full hour, making the correct answer option 1 1/2 grams.

Answer:

133.74 L

Explanation:

First we convert the given pressures and temperatures into atm and K, respectively:

Then we use the PV=nRT formula to calculate the number of moles of helium in the balloon, using the data of when it was on the ground:

Then, knowing the value of n, we use PV=nRT once again, this time to calculate V using the data of when the balloon was high up:

Answer:

[tex]V_2=12.1L[/tex]

Explanation:

Hello!

In this case, according to the given data of volume, pressure and temperature, it is possible to infer this problem can be solved via the combined gas law:

[tex]\frac{P_1V_1}{T_1} =\frac{P_2V_2}{T_2}[/tex]

Thus, regarding the question, we evidence we need V2, but first we make sure the temperatures are in Kelvins:

[tex]T_1=20+273=293K\\\\T_2=-40+273=233K[/tex]

Then, we obtain:

[tex]V_2=\frac{P_1V_1T_2}{T_1P_2}\\\\V_2=\frac{0.987atm*8.50L*233K}{293K*0.550atm}\\\\V_2=12.1L[/tex]

Best regards!

Answer:

B. Precipitation

Explanation:

Precipitation is the scientific term for rain

Bond polarity and ionic character go hand in hand: We can say that polarity and ionic character are positively correlated. The classical way to determine either is to compare the electronegativity difference (ΔEN) between the bonding atoms. The greater the difference in electronegativity, the larger the dipole moment, the greater the polarity, and the greater the ionic character of the bond.

The Pauling electronegativity scale, which should be provided in most chemistry texts and is certainly available online, can be used to determine ΔEN. As a very general rule of thumb, an ΔEN that is equal to 2.0 or greater indicates an ionic bond. We don't have to worry about that here, though, since we're only interested in polarity. But this is just some conceptual relation to consider; indeed, ionic bonds can be seen as very polar covalent bonds (or covalent bonds with significant ionic character).

There is no known bond that has a 100% ionic character (ΔEN = 4), i.e., a purely ionic bond. But there are many bonds that we know of with 0% ionic character (ΔEN = 0), i.e., a completely nonpolar bond. We can think about this logically without even knowing specific electronegativity values: If the difference in electronegativity between two bonding atoms is 0, then the two atoms must have equivalent electronegativities. And when can this be the case? Well, atoms from the same element have the same electronegativity. So one case of completely nonpolar bonding would be covalent bonding between atoms of the same element.

In the question given, there are two such cases: P4 and Br-Br. P4 is a tetrahedral molecule composed of four covalently bonded P atoms, each one bearing a lone electron pair and bonded to the other three. With each P having the same electronegativity (ΔEN = 0), no P-P bond in P4 has a dipole moment, and the P4 molecule itself is nonpolar. Br-Br is how bromine is found naturally (as diatomic Br₂); since this is a covalent bond between the atoms of the same element, the ΔEN = 0 and there is no dipole moment. A bromine molecule is completely nonpolar.

Fluorine (F) has the greatest electronegativity among the elements, so whether the Te-F or the Cl-F bond has the greater polarity (i.e., the greater ΔEN) really depends on the electronegativity of Te and Cl.

But let's think about this first. Both Cl and F are halogens; Cl is in the period right below F, and, following periodic trends, Cl itself is quite electronegative. Generally, nonmetals don't form ionic bonds with each other (the underlying reason is complicated and not relevant here, but that notion agrees with ΔEN between any two nonmetals being less than 2.0). Nonmetallic elements can form very polar covalent bonds whose ΔEN is very close to 2.0, however.

Tellurium (Te) is a metalloid that is three periods below F. Electronegativity generally decreases as you go down a group. Even though Te and Cl are not in the same group, the fact that Te is two periods below should give a strong presumption that Te has a lower electronegativity than Cl. Moreover, electronegativity increases you move left to right on the periodic table (that is, as the group number increases); Te is in a group to the left of fluorine's and chlorine's. So, using periodic trends alone, we know that Te is in a group to the left of and below that of Cl, both of which trend toward decreasing electronegativity. Thus, it would be reasonable to assume that Te would have a smaller electronegativity than Cl. And so, the ΔEN of Te-F > ΔEN of Cl-F, which means the Te-F bond should have the greater polarity. And, indeed, this is true using the Pauling scale: The EN of F is 4.0; the EN of Cl is 3.0; and the EN of Te is 2.1.

In all, given that the ΔEN of P-P = 0; ΔEN of Br-Br = 0; ΔEN of Te-F = 1.9; and ΔEN of Cl-F = 1.0; the Te-F bond has the greatest polarity.

Answer:

38 g

Explanation:

I think thats the answer in your question

Answer:

Reference point, or frame of reference, a system of geometric axes in relation to which measurements of size, position, or motion can be made. Reference point, a geometrical point used to define the location of another point

Explanation: