10. A small gold nugget has volume of 0.87 cm3. What is its mass if the density of gold is 19.3 g/cm3?

Answer:

Option A. 0.330 atm.

Explanation:

To know the correct answer, we simply do the following:

1. Conversion of 251 torr to atm

760 torr = 1 atm

Therefore,

251 torr = 251 torr / 760 torr × 1 atm

251 torr = 0.330 atm

2. Conversion of 251 torr to psi

1 torr = 0.0193 psi

Therefore,

250 torr = 250 torr / 1 torr × 0.0193 psi

250 torr = 4.825 psi

From the above illustrations, 251 torr is equivalent to both 0.330 atm and 4.825 psi. Therefore, only option A is correct.

Answer:

The correct answer is 0.50 mol (NH₄)₃PO₄

Explanation:

The balanced chemical equation between liquid ammonia (NH₃) and H₃PO₄ is the following:

3 NH₃ + H₃PO₄ → (NH₄)₃PO₄

According to the equation, 3 mol of ammonia produce 1 mol of ammonium phosphate. Thus, the stoichiometric ratio is 1 mol (NH₄)₃PO₄/3 NH₃. To calculate the moles of (NH₄)₃PO₄, we multiply the ratio by 1.50 mol NH₃:

1.50 mol NH₃ x 1 mol (NH₄)₃PO₄/3 NH₃ = 0.50 mol (NH₄)₃PO₄

Answer: d. The temperature of the liquid is 60°C.

Explanation:

A quantitative observation is an observation of measure of variables sing in the study or experiment . Variables can be length, weight, temperature , volume etc which can be measured.

From all the given options only option d. is describing a measure ( 60°C).

Hence, an example of a quantitative observation: "The temperature of the liquid is 60°C."

So correct option is d.

Answer:

A. 3.7 x 10⁻³

Explanation:

In the beginning of the reaction there are 0.200 moles of reactant. After 25 minutes, remain 0.108 moles. That means the moles that wer descomposed are:

0.200 moles - 0.108 moles = 0.092 moles of reactant were descomposed.

That descomposition occurs in 25 minutes. The average rate of descomposition in moles / minute are:

0.092 moles Methyl isonitrile / 25 minutes = 3.7x10⁻³ mol/min.

Right option is:

Answer:

i believe its They may feel dizzy because the heart pumps more blood per beat on Earth than in space.

Explanation:

Answer:

They may feel dizzy because the flow of blood to and from the heart to the brain is affected in space.

Explanation:

Answer:

2.8 atm.

Explanation:

From the question given above, we obtained the following data:

Initial volume (V1) = 6.2 mL

Initial pressure (P1) = 1.4 atm

Final volume (V2) = 3.1 mL

Final pressure (P2) =?

The final pressure of the gas cylinder can be obtained by using the Boyle's law equation as shown below:

P1V1 = P2V2

1.4 × 6.2 = P2 × 3.1

8.68 = P2 × 3.1

Divide both side by 3.1

P2 = 8.68/3.1

P2 = 2.8 atm

Therefore, the final pressure of the gas cylinder is 2.8 atm

Answer:

2.8 atm

Explanation:

Answer:

46.41 cm

Explanation:

Area is length times width. Multiply 12.75 by 3.64 to get your answer. Don't forget to label it as cm!

Answer:

c. 100:1.

Explanation:

Hello,

In this case, considering the Henderson-Hasselbach equation:

[tex]pH=pKa+log(\frac{[A^-]}{[HA]} )[/tex]

And the pH two units above the pKa:

[tex]pH=pKa+2[/tex]

We obtain the required ratio as follows:

[tex]pKa+2-pKa=log(\frac{[A^-]}{[HA]} )\\\\\frac{[A^-]}{[HA]} =10^2=100[/tex]

Which is also a c. 100:1 ratio containing 100 parts of base per 1 part of acid.

Regards.

According to Henderson - Hawelbach equation:

[tex]\to pH = pka + \log (\frac{A^{-}}{HA})...........(a)[/tex]

According to question pH two unit above pka:

[tex]\to pH = pka + 2[/tex]

Put value of PH is equation (a)

[tex]\to pKa+2=pKa+ \log (\frac{A^{-}}{HA})\\\\\to 2= \log (\frac{A^{-}}{HA})\\\\\to (\frac{A^{-}}{HA})= 10^2\\\\\to (\frac{A^{-}}{HA})= 100\\\\[/tex]

So, the ratio is [tex][100 : 1][/tex]

Therefore, 100: 1 Ratio containing 100 part of base per 1 part of acid.

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Answer:

361 K

Explanation:

From the tables:

[tex]P_r=4.3/6.14=0.7,T_c=308.3\ K, R=0.2193\ kJ/kgK\\\\Volume (V)=0.045m^3, mass(m)=2kg\\\\v=V/m=0.045/2=0.0225\ m^3/kg[/tex]

Given that:

[tex]v=\frac{ZRT}{P}[/tex]

From the charts, at [tex]P_r=0.7,Z_g=0.59,T_r=0.94[/tex]

[tex]v_g=\frac{0.59*0.3193*0.94*308.3}{4300}=0.0127\ m^3/kg\ which\ is\ small\\ \\At\ T_r=1,Z=0.7,v=\frac{0.7*0.3193*1*308.3}{4300}=0.016\ m^3/kg\\\\At\ T_r=1.2,Z=0.86,v=\frac{0.86*0.3193*1.2*308.3}{4300}=0.0236\ m^3/kg[/tex]

Interpolating, we get [tex]T_r=1.17[/tex], T = 361 K

Answer:

Small fish or insects.

Explanation:

Answer:

I am so confused about this i am so sorry but i cant there is to much going on

Explanation:

Sun2

Sun3

Sun4

Sun5

Sun6

Sun7

Sun8

Sun9

Sun10

Answer:

Atomic mass of element X = 115 g/mol (Approx)

Explanation:

Given:

Amount of XCl3 = 10.69 gram

Amount of X = 5.55 gram

Find:

Atomic mass of element X

Computation:

Moles of Cl =  [Mass of Cl / Molar mass of Cl )

Moles of Cl = [(10.69 - 5.55 ) / 35.5]

Moles of Cl = 0.14479 (Approx)

Moles of X = 0.14479 / 3

Moles of X = 0.04826

Atomic mass of element X = 5.55 / 0.04826

Atomic mass of element X = 115 g/mol (Approx)

Answer:

C. NaOH(s) + HCl(aaq) rightarrow NaCl(s) + H2O(aq)

Explanation:

A neutralization reaction may be defined as the reaction where an acid when it reacts with some base, the products formed are a salt and water.

Simply, we can write,

acid + base --->  salt + water

Here in option (C),

NaOH is sodium hydroxide is an base

HCl is hydrochloric acid

NaCl is sodium chloride and is the common salt

H20 is water

So, option C).  NaOH(s) + HCl(aaq) -----> NaCl(s) + H2O(aq)   is a neutralization reaction.

Answer:

it is A

Explanation:

Its on edge

Christians call Jesus "the Christ” because of the meaning behind the word. The term “Christ” comes from the Greek word “Christos” which means “the anointed one” or “the messiah”.

This title was given to Jesus because of the many prophecies in the Old Testament that foretold of a coming messiah who would save the people of Israel from their enemies and bring peace and justice to the world.

The term “Christ” is also associated with the Latin word “Nazareth”, which is the town where Jesus was born. This further reinforces the idea of Jesus as the messiah, as it was prophesied that the messiah would be born in Bethlehem, which is a town near Nazareth.

Finally, the term “Christ” is also associated with the Latin word “resurrection”. This is because Jesus was believed to have been resurrected from the dead, which was seen as proof of his divine power and the fulfillment of the prophecies about the messiah. This further emphasizes the idea of Jesus as the messiah and savior of the world.

In conclusion, Christians call Jesus “the Christ” because of the meaning behind the word and because of the many prophecies in the Old Testament that foretold of a coming messiah who would save the people of Israel from their enemies and bring peace and justice to the world. The term is also associated with the Latin words “Nazareth” and “resurrection”, which further emphasize the idea of Jesus as the messiah and savior of the world.

Learn more about  Testament  at:

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Answer:

The volume in  in³ is 4.19 in³

Explanation:

To determine the volume in in³ ( cubic inches),

First, we will find the volume in cm³

From the question,

The density of aluminum = 2.70 g/cm³

Mass of the aluminum = 185.3 g

From,

[tex]Density = \frac{Mass}{Volume}[/tex]

Then,

[tex]Volume = \frac{Mass}{Density}[/tex]

Hence,

The volume of the aluminum in cm³ is

[tex]Volume = \frac{185.3 g}{2.70g/cm^{3} }[/tex]

[tex]Volume = 68.63[/tex] cm³

This is the volume in cm³

Now, for the volume in in³

1 in = 2.54 cm

∴ 1 in³ = 16.3871 cm³

Now,

If 16.3871 cm³ = 1 in³

Then, 68.63 cm³ = [tex]x[/tex]

[tex]x =\frac{68.63 \times 1 }{16.3871}[/tex]

[tex]x =4.19[/tex] in³

Hence, the volume in  in³ is 4.19 in³

Answer:

4.19 g/cm3

Explanation:

Answer: D; It helps them avoid mistakes and produce reliable information

Explanation:

It says correct on my APEX test

Answer:

Explanation:

%mass of glucose =(  mass of gucose /mass of solution )x100%

                              =    163  /   (755+  163  )

                               = 17.76 %

Answer:

C) 107 g

Explanation:

Step 1: Calculate the molar mass of Ca(NO₃)₂

We can calculate the molar mass of Ca(NO₃)₂ by adding the masses of its elements.

M = 1 × Ca + 2 × N + 2 × 3 × O

M = 1 × 40.08 g/mol + 2 × 14.01 g/mol + 6 × 16.00 g/mol

M = 164.10 g/mol

Step 2: Calculate the mass corresponding to 0.650 moles of Ca(NO₃)₂

We multiply the number of moles by the molar mass.

0.650 mol × 164.10 g/mol = 107 g

The missing group of choices is as follows:

A. disassemble the equipment.

B. wash their hands.

C. record their observations.

D. clean the lab tables.

Answer:

The correct answer is - B. washing their hands.

Explanation:

Neutralization of an acid involves the reaction of the acid with a strong or week base ( on the basis of acid strength) which leads to the production of salt and water in aqueous solution.

Washing hand acid could be more dangerous as the acid reacts violently with water, however, after the neutralization of acid, there should be normal safety measures which are before leaving the lab one should wash their hand as chemicals used might be toxic or cause harmful effect to an individual.

Thus, the correct answer is - B. washing their hands.

Given :

Nurse Antonio adds that 7 grams of NaCI to water to make 1 liter of solution.

To Find :

The molar concentration of the solution .

Solution :

Molecular mass of NaCl , [tex]m=58.44\ g/mol[/tex] .

Now , number of moles is given by :

[tex]n=\dfrac{\text{Given weight}}{\text{Molecular Mass}}\\\\n=\dfrac{7}{58.44}\ mole\\\\n=0.12\ moles[/tex]

Molarity is given by :

[tex]M=\dfrac{\text{Number of moles}}{\text{Volume ( in Liters)}}\\\\M=\dfrac{0.12}{1}\ M\\\\M=0.12\ M[/tex]

Hence , this is the required solution .

Answer:

.0002

Explanation:

d=m/v

=10g/5cm3

=2g/come

=.0002 kg/cm3

Answer:

A) 5 sig figs

B) 4 sig figs

C) 4 sig figs

D) 4 sig figs

E) 5 sig figs

F) 3  sig figs

G) 5 sig figs

Explanation:

work for G- 1.250 x 105=  131.25

Significant digits/ figures are indeed the number in a value, typically a measure the contributes to the stock's accuracy. It's very first non-zero digit is being used to begin counting significant digits.

Any digits else than zero are relevant. In this, the number of digits is used to express a measurable or calculated amount.

Given:

[tex]A)\ 1234500 \\\\ B)\ 1230.0\\\\ C)\ 0.10220\\\\ D)\ 34560000\\\\ E)\ 0.0000302010\\\\ F)\ 0.02050 \\\\ G) \ 1.250 \times 10^5 \ \ OR\ \ 1.250 \times 105[/tex]

To find:

Significant figures=?

Solution:

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Answer:

Reaction: [tex]\rm HF + H_2O \rightleftharpoons F^{-} + H_3O^{+}[/tex].

Explanation:

In the Bronsted-Lowry acid-base theory, the acid in a reaction is the species that loses a proton, [tex]\rm H^{+}[/tex]. The resultant species would be the conjugate base of that acid.

On the other hand, the Bronsted-Lowry base in a reaction is the species that accepts a proton [tex]\rm H^{+}[/tex]. The resultant species would be the conjugate acid of that base.

Identify the conjugate acid-base pairs in this reaction. Note that the two species in each pair are related by the gain or loss of a single proton. Therefore, their formula should look similar to each other.

For this reaction, [tex]\rm HF[/tex] and [tex]\rm F^{-}[/tex], as well as [tex]\rm H_2O[/tex] and [tex]\rm H_3O^{+}[/tex] form two similar-looking reactant-product pairs:

Answer: Balance

Explanation:  Mass is the amount of matter contained in a body.

Answer:

EMP Pathway - Embden Meyerhof Parnas Pathway

Answer:

glucose 6-phosphate; ATP

kinase; ATP; isomerized

kinase; fructose 1,6-bisphosphate

Explanation:

Answer:

Velocity

Explanation:

Both speed and velocity give speed information but only velocity gives information about the direction. So Velocity is more information. :)

Answer:

The correct option is e

Explanation:

Hydrogen bond is an intermolecular interaction/bonding that are formed between an electronegative atom (such as nitrogen, oxygen and fluorine) and a hydrogen atom. They are weak intermolecular bonds compared to covalent bonds but account for the high boiling point of water because of the strong hydrogen bond presence between the water molecules. Water molecules form hydrogen bonds between each other; since an oxygen atom (in a water molecule) has two lone pairs on it's outermost shell, it forms an hydrogen bond with two hydrogen atoms of other water molecule. Due to the fluidity of liquid water molecules, hydrogen bonds keep getting broken (although recreated/formed almost immediately), hence, individual hydrogen bonds in liquid water does not exist for long.

In the explanation above, it was stated that the strength of the hydrogen bond in water is the reason for it's high boiling point. The atoms in a water molecule are bent NOT linear hence the strength of hydrogen bond does not depend on the linearity of the atoms involved in the bond.

Answer:

you'll be fine if you mark all or one, it's really up to you

Explanation:

did it on edgenuity