A material that can be represented by a chemical formula is a ___

Answers

Answer 1

Answer:

A material that can be represented by a chemical formula is a chemical compound.

What are chemical compounds?

Chemical compounds are substances made up of two or more different elements that are chemically bonded together in a specific arrangement. The elements in a compound can be either metal or nonmetal elements, or a combination of both.

Here,
A chemical compound is a substance made up of two or more different elements that are chemically bonded together. The chemical formula of a compound provides information about the types and numbers of atoms in a molecule of the compound.

For example, water is a chemical compound represented by the formula H2O, which tells us that each molecule of water contains two hydrogen atoms (H) and one oxygen atom (O) bonded together.

Chemical formulas are important tools for chemists to communicate information about the composition and structure of compounds. They allow scientists to predict how compounds will react and to design new compounds with desired properties.

Learn more about chemical compounds here:
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Answer 2

Answer: compound or a simple element.

For example O2 is a chemical formula and represents the element oxigen, because it exists as a diatomic molecule in the air.

NaCl is a chemical formula and represents sodium chloride

CH4 is a chemical formula and represents methane.

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The Pacific plate collides with and is subducted under four other crustal plates. The area where this happens has lots of volcanic activity. This area is called the _____.

Answers

The Pacific plate collides with and is subducted under four other crustal plates. The area where this happens has lots of volcanic activity. This area is called the Ring of Fire.This is a place under the Pacific Ocean and it has numerousvolcanic eruptions and earthquakes and so this region is called the Ring ofFire. In this place there are about 450 active and dormant volcanoes and it isalmost 75 percent of the volcanoes present in our earth.

The Pacific Ring of Fire.

The graph shows how the distance an object traveled changed over time. Which statement accurately summarizes the data from this graph?

A.
The object is decelerating between points B and C because the line is horizontal.

B.
The object is at rest between points B and C because the distance has not changed.

C.
The object traveled the greatest distance between points C and D because that line has the greatest slope.

D.
The object traveled the shortest distance between points A and B because A is 1.5 units from B.

Answers

The right answer for the question that is being asked and shown above is that: "C. The object traveled the greatest distance between points C and D because that line has the greatest slope." The statement that accurately summarizes the data from this graph is that the object traveled the greatest distance between points C and D because that line has the greatest slope.

The radius of Venus is 3760.4 miles. What is the approximate surface area of Venus, to the nearest whole number?

Answers

The answer would be 177696122.85099155 (this is without rounding off to the nearest whole number). If rounded off to the nearest whole number, then the answer is 177,696, 123 miles. I got to this answer through solving for the surface area of a sphere (since Venus is one) using the radius.

Modern scientists say that electrons are found in a ...a. cloud
b. orbital
c. pudding
d. orb

Answers

B) orbital

Each electron has at most 2 orbitals with s,d and more.

Brainliest?

I think it might be a or d i hope i have helped :)

Suppose you decide to cut the wire into two pieces (not necessarily the same length) to shape into two circles. Write a function A ( x ) which models the total area of the two circles in terms of x , the length of one of the pieces of wire. (It may be helpful to use for a circle A = πr 2 and C = 2 πr ). Then find the length x that will minimize the total area.

Answers

Answer:

$2\pi r(r+rx)$

Explanation:

Let the area of one circular side be given by the formula : $A_(1) = \pi r^(2)$

However, the wire is a solid cylinder, then it means that the total area is 2 × $\pi r^(2)$ = $2\pi r^(2)$

However, there is the surface area to consider. This is the curved area of the wire. This is given as:

$A_(2) = lb$

The length is x.

The breadth is calculated as follows - the length of the circle = $\pi D = 2\pi r$

Then the area = lb

= $2\pi rx$

Therefore, the total area is given as $A_(1) + A_(2)$

= $2\pi r^(2) + 2\pi rx\n 2\pi r(r+rx)$

A car traveling with constant speed travels 150 km in 7200 s. What is the speed of the car?

Answers

75 km/hr, so in other words 75 km per hour.

7200 s / 60 = 120 min
120 min / 60 =2 hr
so 150 km / 2 hr = 75 km per hour

Answer:

The speed of the car is $\boxed{75\,{{{\text{km}}} \mathord{\left/{\vphantom {{{\text{km}}} {{\text{hr}}}}} \right.\kern-\nulldelimiterspace} {{\text{hr}}}}}$ or $\boxed{20.83\,{{\text{m}} \mathord{\left/{\vphantom {{\text{m}} {\text{s}}}} \right.\kern-\nulldelimiterspace} {\text{s}}}}$ .

Further Explanation:

Given:

The distance covered by the car is $150\,{\text{km}}$ .

The time taken by the car to cover the distance is $7200\,{\text{s}}$ .

Concept:

The speed of a car is the ratio of the distance covered by the car to the time taken by the car in covering the distance.

The expression for the speed of the car is:

$v = (d)/(t)$ …… (1)

Here, $v$ is the speed of the car, $d$ is the distance covered and $t$ is the time taken by the car.

Substitute the value of distance and time in the above expression.

$\begin{aligned}v &= \frac{{150\,{\text{km}}}}{{7200\,{\text{s}}\left( {\frac{{1\,{\text{hr}}}}{{60 * 60\,{\text{s}}}}} \right)}}\n&= \frac{{150}}{2}\,{{{\text{km}}} \mathord{\left/{\vphantom {{{\text{km}}} {{\text{hr}}}}} \right.\kern-\nulldelimiterspace} {{\text{hr}}}}\n&= 75\,{{{\text{km}}} \mathord{\left/{\vphantom {{{\text{km}}} {{\text{hr}}}}} \right.\kern-\nulldelimiterspace} {{\text{hr}}}}\n\end{aligned}$

The speed of the car in terms of ${{\text{m}} \mathord{\left/{\vphantom {{\text{m}} {\text{s}}}} \right.\kern-\nulldelimiterspace} {\text{s}}}$ can be expressed as.

$\begin{aligned}v&=75\,{{{\text{km}}} \mathord{\left/{\vphantom {{{\text{km}}}{{\text{hr}}}}} \right.\kern-\nulldelimiterspace} {{\text{hr}}}}\left( {\frac{{1000\,{\text{m}}}}{{3600\,{\text{s}}}}} \right)\n&=75 *\frac{5}{{18}}\,{{\text{m}} \mathord{\left/{\vphantom {{\text{m}} {\text{s}}}} \right.\kern-\nulldelimiterspace} {\text{s}}}\n&= 20.83\,{{\text{m}} \mathord{\left/{\vphantom {{\text{m}} {\text{s}}}} \right.\kern-\nulldelimiterspace} {\text{s}}}\n\end{aligned}$

Thus, the speed of the car is $\boxed{75\,{{{\text{km}}} \mathord{\left/{\vphantom {{{\text{km}}} {{\text{hr}}}}} \right.\kern-\nulldelimiterspace} {{\text{hr}}}}}$ or $\boxed{20.83\,{{\text{m}} \mathord{\left/{\vphantom {{\text{m}} {\text{s}}}}\right.\kern-\nulldelimiterspace} {\text{s}}}}$ .

Learn More:

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If no friction acts on a diver during a dive, then which of the following statements is true brainly.com/question/4633609

Answer Details:

Grade:Middle School

Chapter:Speed and distance

Subject:Physics

Keywords:Speed, velocity, distance, time, distance of 150 km, in 7200 s, speed of the car, ratio of distance, rate of change of distance.

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