Whats the equation and answer for these two separate questions!!

Answer: 4.1 cm3

Explanation:

We have that for the Question "The dimensions of a rectangular solid are measured to be 1.27 cm, 1.3 cm, and 2.5 cm. The volume should be recorded as" it can be said that  The volume is

V=4.128 cm^3.

Option D

From the question we are told

The dimensions of a rectangular solid are measured to be 1.27 cm, 1.3 cm, and 2.5 cm. The volume should be recorded as

a )4.1 cm^3.

b )4.13 cm^3.

c )4.12 cm^3.

d )4.128 cm^3.

Generally the equation for the Volume is mathematically given as

[tex]V=L*B*H\\\\Therefore\\\\V=1.27*1.3*2.5\\\\V=4.1275\\\\\V=4.128 cm^3.\\\\[/tex]

Hence The volume is

V=4.128 cm^3.

Option D

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Answer:

I believe it is 9. mass divided by volume and to find volume multiply LxWxH

Answer:

yes

Explanation:

a ternary compound is a compound containing three different elements. An example is sodium phosphate, Na3PO4. The sodium ion has a charge of 1+ and the phosphate ion has a charge of 3-. Therefore, three sodium ions are needed to balance the charge of one phosphate ion.

Answer:

c

Explanation:

because the left side of reactant is take more time to make a product than the first

The rate of these reactions should be considered as the option b. The rate of reaction A is lower.

Since Reaction A is completed in 12 seconds, and reaction B is completed in 21 seconds.

So based on this, we can say that the rate of reaction A should be lower as it contain 12 seconds as compared to reaction b.

hence, the option b is correct.

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Answer:

false

Explanation:

first of all;-energy lead to an indotermic reaction.

indotermic is a reaction that absorbs energy \

*it has positive enthalpy of reaction

*Heat content of product is greater than that of reactant

*Heat is added to reactant side

example;- CO^2+2H^2+891kj --------- CH4 +2O2

Answer:

See explanation

Explanation:

Both BCl3 and BH3 are electron deficient compounds. In these compounds, boron has six instead of eight electrons surrounding it's outermost shell.

BH3 is able to form a dimmer because of the small size of hydrogen atoms which enable them to be fitted between boron atoms. Large size chlorine atoms can not be fitted between boron atoms hence B2Cl6 does not exist.

Answer:

F has the smallest atomic radius.

Explanation:

Atomic radius is one of the perIodic properties defined by the Periodic Table.

Atomich radius is the distance to the nucleus that comprises 95 % of the density  electronic load.  It can be defined  as a function of the internuclear distance. Although this distance varies, depending on whether the atoms are linked by a chemical bond or simply in contact without forming  link.

Atomic radius is a periodic property that increases by period (from the top to below) and decreases (from left to right) by group.

In the same group are O and F, so F < O

In the same group, we have S and Cl, so Cl < S

As Cl and F are in the same period, we define the atomic radius Cl > F and

S > Cl (In the same period)

The right way to order the elements are S > Cl > O > F  

Answer:

Cadmium has larger atomic radius than sulfur.

Explanation:

Down a period, atomic radii decrease from left to right due to the increase in the number of protons and electrons across a period: when a proton is added the pull of the electrons towards the nucleus is larger, so the size of the atom decreases.

Hence, you can compare the elements that belong to a same period and predict that the atom with lower atomic number (number of protons) will haver larger atomic radius. With that:

Oxygen and fluorine are in the period 3, being oxygen to the left of fluorine, so oxygen is larger than fluorine.

Sulfur and chlorine are in the period 4, being sulfur to the left of chlorine, so sulfur is larger than chlorine.

Now see whan happens down a group. Atomic radius increases from top to bottom within a group due to electron shielding. That permits you to compare the size of the elements in a group:

Fluorine and chlorine are in the same group (17), with chlorine directly below fluorine, so the atomic radius of chlorine is larger than the atomic radius of fluorine.

Sulfur and oxygen are in the same group (16), with sulfur directlly below oxygen, so sulfur the atomic radius of sulfur is larger than the atocmi radius of oxygen.

So far, you can rank the atomic radius of sulfur, chlorine, fluorine, and oxygen, in increasing order as:

O < F < Cl < S, concluding that O, F, and Cl have smaller atomic radius than S.

Cadmiun, Cd, is to the left and below sulfur, so both electron shielding (down a group) and increase of the number of protons (down a period) lead to predict the cadmium has a larger atomic radius than sulfur.

Answer:

both. yes

Explanation:

Answer:

Answer:

Explanation:

Because the units are specifically designed in such a way that anyone, anywhere could reproduce them. They are based on scientifically developed definitions. For example the meter is defined as

Current definition (1983): The distance traveled by light in vacuum in [tex]{\displaystyle {\frac {1}{299792458}}}{\displaystyle {\frac {1}{299792458}}}[/tex]second.

That does not look like a great improvement, but it is certainly better than the distance of 1/10,000,000 of the distance between the meridian going through Paris going from the North Pole to the equator. How would you even measure that without a guess somewhere?

The subunits are also much better. 1/10 of a meter is much easier to dial with than a foot or a yard which is very arbitrarily defined.

Explanation:

The international System of Units adopted to facilitate measurements of diverse quantities.

Answer:

d

Explanation:

i think

Answer:

Oxygen is a nonpolar molecule.

Explanation:

It is symmetric, because two oxygen atoms pull on the electrons equally. Propane is also nonpolar.

Answer:

yessir

Explanation:

Answer:

yxfuu do wiz so chic yucky e

Explanation:

Because gold is a very unreactive metal and exists as a pure substance (instead of oxides).

Answer:

Sound & Mechanical (i think)

Explanation:

Answer:

we kno you already do :)

Answer:

0.40 g/cm3

Explanation:

density = mass / volume.

mass = 65.2 grams

volume = 10*1.1*15=165 cm3

so density = 65.2/165=0.40 g/cm3

Answer:

0.2m/s

Explanation:

speed =d/t

10/55= 0.181

approximately 0.2m/s

Answer: it is b.

Explanation: Average Speed = Total Distance  

                                                      Total Time

= 10m/5s

=2m/s

Hope this helps!!

Answer:

[tex]\huge\boxed{\sf Option \ A}[/tex]

Explanation:

The symbol for TIN is Sn.

When Sn loses 2 electrons, it gets a double positive charge ( +2 ) and becomes [tex]\sf Sn ^{+2}[/tex].

It becomes a cation.

The name of Ion is Tin ( II ) Ion.

[tex]\rule[225]{225}{2}[/tex]

Hope this helped!

Answer:

option a

Explanation:

gradpoint

Answer:

The concentration is 50%

Explanation:

Mass-Volume concentration is molarity (M) times 100% or [tex]\frac{Gsolute}{Lsoln}[/tex] * 100%

For this problem, we need to convert from milligrams to grams and milliliters to liters in order to plug the values into the equation and solve for the concentration.

So, 250 mg = 0.025g (there are 1000 mg in 1 g)

And 500ml = 0.05 L  (there are 1000 ml in 1 L)

Now we can solve for the concentration

[tex]\frac{0.025 g}{0.05 L}[/tex] [tex]* 100[/tex] %=  0.5 [tex]* 100[/tex] % = 50% of Tylenol concentration

Answer:

The correct answer is B

Explanation:

Educere

aluminium + copper oxide → aluminium oxide + copper. Hence, option B is correct.

A word equation represents a chemical reaction using the names of the substances involved.

aluminium + copper oxide → aluminium oxide + copper correctly shows the word equation for the reaction of aluminium and copper oxide yielding aluminum oxide and copper.

Hence, option B is correct.

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#SPJ2

Acid of x bottle is highly reactive because solute is more and acid of y bottle is less reactive because solvent is more.

Answer:

-3

Explanation:

Answer:

neutrons ................

Answer:

Q = 450 J

Explanation:

Given that,

Mass of a piece of glass, m = 45 g

The temperature changes from 10°C to 30°C.

The specific heat is 0.5 J/g°C

We need to find heat required to raise the temperature. The formula that is used to find it is given by :

[tex]Q=mc\Delta T\\\\Q=45\times 0.5\times (30-10)\\\\Q=450\ J[/tex]

So, the required heat is 450 J. Hence, the correct option is (c).

Answer:

Radium (Ra)

Metal

Alkaline Earth Metal

Protons & Electrons: 88

Neutrons: 138

Explanation:

Answer:

magnesium, Mg, metal, alkaline earth metals, its neutral atom has 12 protons and 12 neutrons and 12 electrons  

we use the formula

pV=nRT

we convert Kilo Pascals to mmHg

253.25 KPa=253250 pascals

1mmHg is equal to 133.322 pascals

xmmHg are equal to 253250pascals

x=253250/133.322=1900mmHg

now we convert mmHg to atmospheres

1 atmosphere is equal to 760mmHg

x atmospheres are equatl to 1900mmHg

x=1900/760=2.5 atmospheres

in the formula:

pV=nRT

p-pressure

V-volume

n-number of moles

R-ideal constant of gases

T-temperature

the only missing variable is temperature since we know that  R=0.082

250ml=0.25L

0.25*2.5=0.1*0.082T

T=0.625/0.0082=76.219K