A runner wants to run 11.7 km. Her running pace is 8.0 mi/hr. How many minutes must she run?

Answer:

All life on Earth descended from a common ancestor

Answer:

C. NaHCO3 → Na2CO3 + H2O + CO2

Explanation:

» For a balanced equation, the number of atoms of reactants and products must be equal.

» In equation C, the reactant side has one sodium atom while ptoduct side has 2 sodium atoms.

» The balanced equations mus be;

[tex]{ \rm{ 2NaHCO _{3(aq)} → Na _{2}CO _{3(s)}+ H _{2} O _{(l)} + }CO _{2(g)} }[/tex]

Answer:

Option C

Explanation:

Let's balance that

[tex]\\ \tt\hookrightarrow 2NaHCO_3\longrightarrow Na_2CO_3+H_2O+CO_2[/tex]

On reactant side

On products side

Answer:

False

Explanation:

Answer:

The molar mass is 138.8843 g/mol 

The Volume and the density of the box are 480 in³, 7865.81 cm³, 0.127 g/mL

This is the measure of the capacity of substance an object can hold.

To calculate the volume  of the box, we use the formula below

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

We convert the volume from cubic inches to cubic centimeters using the expression below.

Density can be defined as the ratio of the mass and volume of a body.

To calculate the density of the box, we use the formula below.

From the question,

Given:

Substitute these values into equation 2

Hence, The Volume and the density of the box are 480 in³, 7865.81 cm³, 0.127 g/mL.

Learn more about Density here: https://brainly.com/question/952755

The heat will flow from the system at 40°C to a system at 293 Kelvin.

If two systems at different temperatures have contact with each other, heat will flow from the system at 40°C to a system at 293 Kelvin because temperatures moves from hotter body to cold body.

We know that 293 kelvin is equals to 20° Celsius which is lower than 40° Celsius so the heat energy moves from the body having 40° Celsius temperature to the body having 293 kelvin temperature so we can conclude that the heat will flow from the system at 40°C to a system at 293 Kelvin.

Learn more about heat here: https://brainly.com/question/934320

Learn more: https://brainly.com/question/26387209

Answer: I was doing hw and this question is one of them

Explanation:

Answer:

The oeriodic table have 8 groups

Answer:

you can do it

Explanation:

The maximum number of Percocet tablets a patient can take daily, while staying within the recommended acetaminophen dose of 3.9g, is 12 tablets.

To determine the maximum number of Percocet tablets a patient can take daily without exceeding the recommended dose of 3.9g of acetaminophen, we need to perform a unit conversion.

1. Convert 3.9g to mg (since the amount of acetaminophen per tablet is given in mg):  3.9g = 3900mg

2. Calculate the number of Percocet tablets based on the amount of acetaminophen per tablet:  Each Percocet tablet contains 325mg of acetaminophen.

3. Divide the maximum allowable dose of acetaminophen (3900mg) by the amount of acetaminophen per tablet (325mg) to find the maximum number of tablets: 3900mg / 325mg = 12 tablets

Therefore, the maximum number of Percocet tablets a patient can take daily without exceeding the recommended dose of acetaminophen (3.9g) is 12 tablets.

Learn more about Dose here:

https://brainly.com/question/29367085

#SPJ3

Answer:

1 mole

Explanation:

The mole (mol) is the amount of a substance that contains the same number of entities as there are atoms in exactly 12 g of carbon-12. One mole (1 mol) contains 6.022x1023 entities (to four significant figures).

Muscular and nervous system involved

Conversion Factors:

1.61 km = 1 mile

60 sec = 1 min

60 min = 1 hour

Use dimensional analysis to solve.

[tex]=\frac{16\ meters}{1\ second}[/tex] × [tex]\frac{1\ km}{1000\ meters}[/tex] × [tex]\frac{1 mile}{1.61\ km}[/tex] × [tex]\frac{60\ seconds}{1\ min}[/tex] × [tex]\frac{60\ min}{1\ hour}[/tex]

[tex]=35.77639752[/tex]

= 36 miles/hour

If done properly, you should be left with the units miles/hour

Answer:

jesus

Explanation:

Jesus is always the answer LOL

This problem is providing us with the mass of propane, its enthalpy of combustion, and the initial and final temperature of water that can be heated from the burning of this fuel. At the end, the result turns out to be 42.27 L.

In chemistry, combustion reactions are based on the burning of fuels by using oxygen and producing both carbon dioxide and water. For propane, we will have:

[tex]C_3H_8+5O_2\rightarrow 3CO_2+4H_2O[/tex]

Hence, we can calculate the heat released from this reaction by using the mass, which has to be converted to moles, and the given enthalpy of combustion:

[tex]Q=281.0g*\frac{1mol}{44.09g}*-2220\frac{kJ}{mol}*\frac{1000J}{1kJ}\\ \\ Q=-1.415x10^7 J[/tex]

In chemistry, we can analyze the mass-specific heat-temperature-heat relationship via the most general heat equation:

[tex]Q=mC\Delta T[/tex]

Thus, since Q was obtained from the previous problem, but the sign change because the released heat is now absorbed by the water, one can calculate the mass of water that rises from 20.0°C to 100.0°C with this heat:

[tex]m=\frac{Q}{C\Delta T} =\frac{1.415x10^7J}{4.184\frac{J}{g\°C}(100.0\°C-20.0\°C)}\\ \\m=4.227x10^4g[/tex]

Finally, we convert it to liters as required:

[tex]V=4.227 x10^4g*\frac{1mL}{1.00g}*\frac{1L}{1000mL} \\\\V=42.27L[/tex]

Learn more about calorimetry: https://brainly.com/question/1407669

Answer:

Like when they work of need to look something important

Explanation:

like image you are chilling and then your like omg I need to turn in the work and you go to your computer and send it but you used your computer

Key words:-

Now

Apply combined gas law

[tex]\\ \tt\hookrightarrow \dfrac{P_1V_1}{T_1}=\dfrac{P_2V_2}{T_2}[/tex]

[tex]\\ \tt\hookrightarrow \dfrac{1(1.2)}{273}=\dfrac{(0.800)V_2}{299}[/tex]

[tex]\\ \tt\hookrightarrow 0.004=0.002V_2[/tex]

[tex]\\ \tt\hookrightarrow V_2=2L[/tex](Approx)

Answer:

77.8 grams of Ca

Explanation:

Answer: The group of elements at the far right of the table (Group 18) is known commonly as the noble gases. They are generally chemically inert.

Explanation: There names are:

He = Helium

Ne = Neon

Ar = Argon

Kr = Krypton

Xe = Xenon

Rn = Radon

Elements on the far right of the periodic table are noble gases. They are generally chemically inert.

The noble gases are a group of chemical elements that share several characteristics. They are all monatomic, odorless, and colorless gases with relatively little chemical reactivity under normal conditions. Helium, neon, argon, krypton, xenon, and radioactive radon are the six types of noble gases that are found in nature.

In order of mass, the noble gases are helium, argon, krypton, xenon, and radon. They are known as noble gases because of how beautiful they are and how little they mostly react with anything.

The noble gases are employed to create inert atmospheres, usually for arc welding, to shield specimens and prevent chemical reactions. The substances are utilized in lasers as well as lamps like neon and krypton headlamps. Helium is used in balloons, air tanks for deep sea divers.

Thus, Elements on the far right of the periodic table are noble gases.

To learn more about noble gases, follow the link;

https://brainly.com/question/11764545

#SPJ2

Answer:

convergent boundary subduction zone

Explanation:

Answer:

The motion of the plates would be considered a convergent boundary which is where old crust goes under the new crust and is reheated overtime. This could also be known as a convection current. This is when the mantle is heated up and rises to the top an when it cools off, it goes back down and then that cycle repeats itself overtime.

Explanation:

Plato

Answer:

Strontium

Explanation:

To find the element, we need to know the atomic number. There is this rule in chemistry that says that the number of protons and the atomic number are the same. Since we know that there are 38 protons, the atomic number is also 38, leading us to Strontium. Sr -- element symbol.

The mass number is located below the element symbol on a periodic table. The mass number or the atomic mass for Strontium is 87.62 u.

Since there are an uneven amount of protons and electrons, let's subtract the number of electrons from the number of protons to find the difference. 38-36 = 2. (Also, protons are positive and electrons are negative, meaning there are more + than - in the ionic charge). Which means, the atom has a +2 ionic charge.

Answer: Some of the highest mountain ranges in the world are Himalayas, Andes, Rocky, Mountains can be of different types depending upon the process of origin.

Explanation:

Just trust me

We have that the  two significant redox processes  is given as

reduction reaction

From the question we are told

identify two significant redox processes in biochemical systems​

Generally the the are two name that comes to mind when redox reaction is mentioned

And these makes two significant Redox processes in biochemical systems​

For more information on biochemical visit

https://brainly.com/question/6876669

Answer:

Water- 9.982 grams

toluene-8.669 grams

chloroform - 14.832 grams

Explanation:

the units of density are listed as g/mL. So for every mL of substance you have, you will have that many grams.

Water- .9982g/mL * 10 mL

As you can see, the units of "mL" cancel each other out, leaving just the gram amount of water.

Answer:

the 2nd one

Explanation:

All other symbols are for Mathematics.

1) find the molar mass of C₇H₁₄O₇.

[tex]=7(12.01)\ +\ 14(1.01)\ +\ 7(16.00)\\\\=84.07\ +\ 14.14\ +\ 112.00\\\\=210.21\ g/mol[/tex]

2) solve using dimensional analysis

[tex]=0.159\ mol\ C_{7}H_{14}O_{7}[/tex] × [tex]\frac{210.21g\ C_{7}H_{14}O_{7}}{mol\ C_{7}H_{14}O_{7}}[/tex]

= 33.42339

= 33.4g C₇H₁₄O₇

Answer:

When iron wool combusts, it reacts with oxygen from the air to form iron oxide. Iron oxide is a solid, so the oxygen atoms from the air add to the mass on the balance. The balance tips as the iron wool reacts with the oxygen to form solid iron oxide. from.

Explanation:

Answer:

460.62656

not really sure :(