Can someone please help me on numbers 6 and 7 please? Thank you!!!! :)

Answer:

The car has been on the road for 0.49 hours

Explanation:

A car is traveling 35 miles/hr for 17 miles.

Speed of a car = 35 miles/hr

Distance travelled = 17 miles

The relationship between speed, distance, and time is given by

Distance = Speed × Time

Put Speed = 35 miles/hr, Distance = 17 miles

[tex]17=35[/tex] × Time

Time = [tex]\frac{17}{35}=0.49[/tex] hours

So, the car has been on the road for 0.49 hours

The time car has been on the road has been 0.49 hours. Thus, option D is correct.

Speed can be defined as the distance traveled by the object in unit time. The speed can be expressed as:

[tex]\rm Speed\;=\;\dfrac{Distance}{Time}[/tex]

The car has been given to be traveling at:

Speed = 35 miles/hr

Distance traveled = 17 miles.

The time taken by car to travel 17 miles can be calculated by substituting the values as:

[tex]\rm 35\;miles/hr\;=\;\dfrac{17\;miles}{Time}\\\\\\\\Time\;=\;\dfrac{17\;miles}{35\;miles/hr}[/tex]

Time = 0.49 hr.

The time taken by car to travel 17 miles has been 0.49 hours. Thus, the correct option has been D.

For more information about speed, refer to the link:

https://brainly.com/question/7359669

Answer: Atoms lose energy as a gas changes to a solid.

Explanation:

Answer:

Atoms lose energy as a gas changes to a solid.

Explanation:

Answer:

In medicine, genetic engineering has been used to mass-produce insulin, human growth hormones, follistim, human albumin, monoclonal antibodies, antihemophilic factors, vaccines, and many other drugs. In research, organisms are genetically engineered to discover the functions of certain genes.

Explanation:

Answer: What are black holes and how do they work?

Explanation:

Answer:

To draw a Lewis dot structure for an atom, you must know how many valence electrons an atom possesses. The periodic table organizes the elements based on the similarity of their chemical properties.

Explanation:

D- A molecule

Explanation:

(Apex)

Answer:

B) Tarnishes

Explanation:

Gold is rare, Gold is malleable, Gold is corrosion resistant

Hope this helps!

Answer:

Energy is used to break bonds in reactants, and energy is released when new bonds form in products. ... In other chemical reactions, it takes more energy to break bonds in reactants than is released when bonds form in products. These reactions, called endothermic reactions, absorb energy.

Explanation:

Answer:

a

Explanation:

aluminum is a metal

Answer:

Carbon. This item is an element because it is on the periodic table.

Explanation:

Anything on the periodic table is an element.

Answer:

the solvent is water and the solute is salt

Explanation:

A solute is the component in a solution in the lesser amount. In a NaCl solution, the salt is the solute. A solution may contain more than one solute.

Answer:

B Carbon

Explanation:

I really hopes this helps you!

Answer:

Liquid

Explanation:

Because water becomes a solid (freezes) at 0°C and becomes a gas (evaporates) at 100°C, it is liquid at any temperature in between.

Answer:

uh... where? what do you mean?

Explanation:

Answer: C

Explanation:

Answer:

If 700 g of water at 90 °C loses 27 kJ of heat, its final temperature is 106.125 °C

Explanation:

Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.

In this way, between heat and temperature there is a direct proportional relationship (Two magnitudes are directly proportional when there is a constant so that when one of the magnitudes increases, the other also increases; and the same happens when either of the two decreases .). The constant of proportionality depends on the substance that constitutes the body and its mass, and is the product of the specific heat and the mass of the body. So, the equation that allows to calculate heat exchanges is:

Q = c * m * ΔT

Where Q is the heat exchanged by a body of mass m, constituted by a substance of specific heat c and where ΔT is the variation in temperature, ΔT= Tfinal - Tinitial

In this case:

Replacing:

[tex]27,000 J=4.186 \frac{J}{g* C}*400 g* (Tfinal - 90C)\\[/tex]

Solving:

[tex]27,000 J=1,674.4 \frac{J}{C}* (Tfinal - 90C)[/tex]

[tex]\frac{27,000 J}{1,674.4 \frac{J}{C}} =(Tfinal - 90C)[/tex]

16.125 °C= Tfinal - 90 °C

Tfinal= 16.125 °C + 90 °C

Tfinal= 106.125 °C

If 700 g of water at 90 °C loses 27 kJ of heat, its final temperature is 106.125 °C

Answer:

When you stir a spoonful of sugar into a glass of water, you are forming a solution.

Answer:

41

Explanation:

mate u literally just have to substitute the values into ur formula. u would then get 20 times 2.5 which is 41

Answer:

They both keep the mass number the same while bringing the atomic number down 1

Explanation:

Answer:

They both keep the mass number the same while bringing the atomic number down 1.

Thank the person above or below! Whoever said this answer just wanted to answer it so I could keep my streek, sorry!

Answer:

It is a mixture

Explanation:

Because it mixes chocolate, milk, sugar, and vanilla to make it sweet and not taste like plain cocoa powder.

Answer:

the anion OH having one oxygen and one hydrogen atom.

Explanation:

Answer:

I Pretty sure its b

Explanation:

Answer:

The human eye can only see white visible light and it contains all the colors of the rainbow, from red to violet.

Explanation:

But visable light comes in many "colors" such as radio, infrared, ultraviolet, X-ray, and gamma-ray that are invisible to the naked eye.The reason that the human eye can see the spectrum is because those specific wavelengths stimulate the retina in the human eye.

Answer:

in solid form salt form

Answer:

Detail is given below.

Explanation:

Each element have a specific number of valence electron. We can easily find out the number of valence electron in an atom through electronic configuration. The electrons reside in outer orbital are called valence electrons. It is also equal to the main group number of that element. Consider the example,

Sodium is present in group one thus it has 1 valence electron.

Electronic configuration of sodium:

Na₁₁ = 1s² 2s² 2p⁶ 3s¹

Let consider the example of halogens they are present in group 7A thus they have seven valence electrons.

Electronic configuration of fluorine:

F₉ = 1s² 2s² 2p⁵

The outer orbital contain seven electrons thus these are valance electron.

Copper is present in group 2B thus it must have two valence electrons.

Let check this from electronic configuration.

Cu₂₉ = 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁹

The outer most orbital is 4s² and it has two electron thus number of valence electron in copper are 2.

Answer:

Explanation:

An atomic mass unit (symbolized AMU or amu) is defined as precisely 1/12 the mass of an atom of carbon-12. The carbon-12 (C-12) atom has six protons and six neutrons in its nucleus. In imprecise terms, one AMU is the average of the proton rest mass and the neutron rest mass.

Answer:

False

Explanation:

Changing the coefficients is one of the steps of balancing a chemical equation. Changing the subscript changes the compounds being used, while changing the coefficient changes the amount of each compound being used.