PLEASE HELP ME :(((


What is the relative size and composition of the universe, a galaxy, and a solar system?

Answers

Answer 1

Answer:

about 93 billion light years

Explanation:

The observable Universe is, of course, much larger. According to current thinking it is about 93 billion light years in diameter.

Answer 2

Answer:

93 miles

Explanation: We can determine the distance to the sun using the time light takes to get to Earth. Just multiply the speed of light by the amount of time it takes light to get to Earth. That's 500 seconds.

186,282 miles per second x 500 seconds = 93,141,000 miles

The sun is about 93 million miles away from Earth. It will take our fastest space shuttle moving at a constant maximum speed about 108 days to travel this same distance.


Related Questions

_Ch7H16+_O2=_CO2+_H2O balancing the equation

Answers

Answer:

0,11,7,8

Explanation: hope this helps!

If an amine functional group is added to an organic compound, the name of the compound will begin with

Answers

Answer for a apple it would be happle

xplanation:

2COOH
How many of each element is present in the following formula?

Answers

What formula I don't see it!?

A student dissolves 10 grams of sugar in enough water to make 25 ml of solution. What is the concentration of the solution

Answers

Answer: The concentration of given solution is 11.68 M.

Explanation:

Given: Mass of solute = 10 g

Volume of solution = 25 mL

Convert mL into L as follows.

[tex]1 mL = 0.001 L\\25 mL = 25 mL \times \frac{0.001}{1 mL}\\= 0.025 L[/tex]

Number of moles is the mass of substance divided by its molar mass. The moles of sugar (molar mass = 342.3 g/mol) is as follows.

[tex]No. of moles = \frac{mass}{molar mass}\\= \frac{10 g}{342.3 g/mol}\\= 0.0292 mol[/tex]

Molarity is the number of moles of solute present in a liter of solution.

Hence, concentration of given solution is calculated as follows.

[tex]Molarity = \frac{no. of moles}{Volume (in L)}\\= \frac{0.0292 mol}{0.025 L}\\= 11.68 M[/tex]

Thus, we can conclude that the concentration of given solution is 11.68 M.

A 6.23 g nugget of pure gold absorbed 282 J of heat. The initial temperature was 30.4 degrees Celsius. What was the correct final temperature of the gold nugget if the specific heat of gold is 0.129 J/gC

Answers

Answer:

Final temperature, T2 = 381.28°C

Explanation:

Given the following data;

Mass = 6.23 g

Initial temperature = 30.4°C

Heat capacity = 282 J

Specific heat capacity = 0.129 J/g°C

To find the final temperature;

Heat capacity is given by the formula;

[tex] Q = mcdt[/tex]

Where;

Q represents the heat capacity or quantity of heat.

m represents the mass of an object.

c represents the specific heat capacity of water.

dt represents the change in temperature.

Making dt the subject of formula, we have;

[tex] dt = \frac {Q}{mc} [/tex]

Substituting into the equation, we have;

[tex] dt = \frac {282}{6.23*0.129} [/tex]

[tex] dt = \frac {282}{0.8037} [/tex]

dt = 350.88°C

Now, the final temperature T2 is;

But, dt = T2 - T1

T2 = dt + T1

T2 = 350.88 + 30.4

Final temperature, T2 = 381.28°C

Balance the Chemical Equation. Fill in the Missing Coefficients. GeF3 + Cs = CsF + Ge

Answers

1GeF3 + 3Cs = 3Csf +1Ge
DONT HATE ME IF ITS WRONG PLS
Itsttsdtyfydydydyddytdtddttddggdgdgd


4. Based on their placement on the periodic table, which of the following is more
reactive?
A.Sodium (Na)
B. Magnesium (Mg)
C. Barium (Ba)
D. Neon (Ne)

Answers

Ur answer is A! Sodium

what is the chemical formula for sugar ( in water)?

Answers

H2O
I think.....
Tell me if I am wrong

What are the consequences of purposely having an excess of one of the reactants?

Answers

Answer:

When one reactant is in excess, there will always be some left over. The other reactant becomes a limiting factor and controls how much of each product is produced. While using excess reactants can help to increase percentage yields, this is at the expense of atom economy.

Explanation:

Al hacer reaccionar 5g de cinc con ácido sulfúrico se observa que la reacción ocurre en 20s. ¿Cuál será la rapidez de la reacción? Masa atómica del cinc 65,37g.

Answers

Answer:

0.0038 mole s-1

Explanation:

La velocidad de una reacción se refiere a la rapidez o la lentitud con que avanza una reacción. Se mide por la cantidad de reactivos que desaparecen por unidad de tiempo o por la cantidad de productos que aparecen por unidad de tiempo.

Número de moles de zinc = 5g / 65.37gmol-1 = 0.076 moles

Velocidad de reacción = 0.076 moles - 0 moles / 20 s - 0s = 0.0038 mole s-1

Is everything correct?

Answers

Yes everything is correct! You’re doing an amazing job!
Yes everything is correct your doing a great job

Helllpppp I will give you branliest!!! In which cell organelle is DNA found?

Answers

Answer:

nucleus

Explanation:

Answer:

Found in the nucleus

Explanation:

I hope this answer is correct and helpful!

Hydrologers study the availability of fresh water on the planet.

Answers

Answer:

Hydrologists study how water interacts with the earth's crust. For example, they may study how rainfall and snowfall cause erosion, create caves, percolate through soil and rock to become groundwater, or eventually reach the sea.Hydrologists strive to improve water quality and increase our access to water so that we can continue to make use of it in all the ways that are necessary to our lives. A hydrologist measures the stream flow in a tributary to the Coeur d'Alene River. layers of gases surrounding a planet or other celestial body

TEACH ME how to do question 2 through your explanations.

Answers

Answer:

Explanation:

The first two are easy:

H2O, H3O+ and OH- all exist in an equilibrium

[H3O+] = [OH-] = 10^-7 M

HCl is a strong acid so 1M of it will disassociate completely

[H3O+] = [Cl-] = 1 M

The third one is also an equilibrium as HNO2 is a weak acid. Ka is given so [HNO2] and [NO2-] can be calculated.

The fourth one is a buffer solution so its pH can be looked up to give the concentrations.

Answer:

Explanation:

H20 has pH of 7

1st reaction [H30+] = 10^-7M

[OH-] = 10^-7M

1M HCl has pH of 0

2nd reaction [H3O+] = 1M

[Cl-] = 1M

given Ka = 4.6x10^-3 = [H3O+]x[NO2-] / [HNO2]

and [HNO2] + [NO2-] = 1M

each concentration can be solved

beaker D is a buffer solution n requires more info 2 solve

In your own words, describe how the moon’s gravity affects the tides.

Answers

Answer:

It makes them splash more.

Explanation:

Answer:

Tidal force

Explanation:

The moon's gravitational pull generates the tidal force. The tidal force causes Earth, more specifically Earth's water to bulge out on the side closest and farthest from the moon. These are high tides.

hope this helps:)

2.28 Global Warming’s Negative Effects Worksheet

Watch this Video and to answer the following questions.

What type of human activity increases the amount of CO2 in the atmosphere?



Explain how climate change affects our oceans


Explain how climate change affects our weather


Explain how climate change affects our food


Explain how climate change affects our health


What can we do to prevent the negative effects of climate change?

PLEASE ANSWER ASAP GIVE BRAINLIEST

Answers

Human activities that increase the amount of CO2 in the atmosphere include, the burning of coal/ other fossil fuels, cement production, deforestation, and other landscape changes.

Climate change causes the oceans to absorb more heat, resulting in an increase in sea surface temperatures and rising sea levels. This change in ocean temperatures and currents brought about by climate change can lead to alterations in climate around the world.

Climate changes affects crop growth, meat production, fisheries, and other fundamental aspects of our food supply. This is because if our climate is constantly changing our Earth will no longer be able to sustain the adequate necessities of food production.

Climate change cause health issues. Change in climate can cause existing health problems to intensify and new health issues to emerge. Climate change can influence air pollution, allergies, disease carried by vectors, food and waterborne diseases, food security, mental health and stress-related disorders, floods, temperature extremes, and wildfires. All of these factors can have negative effects on ones health.

To reduce the negative effects of climate change we can speak up about climate change, use renewable energy, weatherize, invest in energy-efficient appliances, reduce water waste, make less food waste, etc.

Magnesium (used in the manufacture of light alloys) reacts with iron(III) chloride to form magnesium chloride and iron. A mixture of 41.0 g of magnesium and 175.0 g of iron(III) chloride is allowed to react. Identify the limiting reactant and determine the mass of the excess reactant present in the vessel when the reaction is complete. Select one: a. Limiting reactant is Mg; 7.4 g of FeCl3 remain. b. Limiting reactant is Mg; 46.5 g of FeCl3 remain. c. Limiting reactant is FeCl3; 1.7 g of Mg remain. d. Limiting reactant is FeCl3; 37.8 g of Mg remain. e. Limiting reactant is Mg; 134.0 g of FeCl3 remain.

Answers

Answer:

Limiting reactant is FeCl3; 1.7 g of Mg remain.

Explanation:

From the question;

The equation is;

3Mg(s) + 2FeCl₃(s) → 3MgCl₂(s) + 2Fe(s)

Amount of Mg = 41 g/24.31 g/mol = 1.687 moles

The limiting reactant yields the least amount of MgCl2

3 moles of Mg yields 3 moles of MgCl2

Hence 1.687 moles of Mg yields yields 1.687 moles of MgCl2

FeCl₃ = 175 g/162.2 g/mol = 1.0789 moles

2 moles of FeCl3 yields 3 moles of MgCl2

1.0789  moles of FeCl3 yields 1.0789  * 3/2 = 1.61835 moles of MgCl2

Hence FeCl3 is the limiting reactant

3 moles of Mg reacts with 2 moles of FeCl3

x moles of Mg reacts with 1.0789  of FeCl3

x = 3 * 1.0789  /2 = 1.61835 moles of Mg

Mass of Mg reacted = 1.61835 moles * 24.31 = 39.342 g

Mass of excess Mg = 41 g - 39.342 g = 1.7 g

 

                   

                   

 

                           

                         

       

What are the only types of metals that be magnetized?

Answers

Iron, nickel, cobalt? I’m not really sure. Hope this helped a little bit.
iron colbalt and nickel is the answer

Which statement most accurately describes a chemical equation?
a. in a chemical reaction, the mass of the energy change must be equal to the energy used
b. in a chemical reaction, the mass of the products must equal the mass of the reactants
c. in a chemical reaction, the mass of each product must be the same
d. in a chemical reaction, the combined mass of the container the substances is always equal

Answers

Answer: A

Explanation:

Which of the following factors affects the amount of heat absorbed by a substance?
A. Boiling point of the substance
B. Specific heat capacity of the substance
C. Melting point of the substance
D. Shape of the substance

Answers

Answer:

The correct answer is B, "Specific heat capacity of the substance."

Explanation:

I just took the test. I hope this helps!

Heat absorbed changes the bonds of the molecules or the compounds to alter their state. The specific heat capacity affects the amount of heat absorbed. Thus, option B is correct.

What is specific heat capacity?

Specific heat capacity is defined as the amount of heat or energy absorbed by the kilogram of the solid reactant when the system experiences a rise in temperature. It is measured in J/(kg K) or J/(kg °C).

The specific heat capacity, the mass of the substance, temperature, and the phase of the substance affects the absorption of the heat from the surrounding. The specific heat affects absorption as it tells about the substance's ability to take the heat energy.

Therefore, specific heat capacity affects heat absorption.

Learn more about specific heat capacity here:

https://brainly.com/question/2530523

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21. An object appears blue when seen in sunlight. The same object is illuminated by a mixture of equally bright red and green light. It is also viewed through a blue filter. What color does the object appear to be? A. Blue B. Cyan C. Black D. Green

Answers

Answer: Green.

Explanation: Because object appears to be blue in sunlight, it absorbs counter colour of blue, also orange-red colour. So, when illuminated with

red-green colour, red light is more absorbed and object appears to be green.

Older stars get smaller and cooler and are called white dwarfs.
True

Answers

Answer:

si

Explanation:

trye

teen

ieksnaal

kaisksd

Which reaction type? *

combination (synthesis)
combustion
decomposition
single replacement
double replacement

Answers

Single replacement.

Mg replaces the H in HCl to become MgCl2.

A car travels at 24km/hr to the north. Then it travels 24km/hr to the east. Which is true about the car's acceleration?

a
The car accelerated because it speed increased.
b
The car accelerated because it changed direction.
c
The car did not accelerate because its speed did not change.
d
Only the velocity changed, not the acceleration not the acceleration.

Answers

Answer:

D

Explanation:

What are some of the issues facing the ocean ( give at least 3 )

Answers

Answer:

Pollution

Overpopulation

Destruction of habitats

Explanation:

Why do the two electrons spend their time equally between both hydrogen atoms? In other words, why can’t one hydrogen just take the other’s electron?

Answers

Because it is a covalent bond meaning that they share the electrons to achieve full valence.
There is a single bond present between Hydrogen and hydrogen.Hydrogen has valency 1So inorder to complete octet both electrons share 1 electrons.So they has restriction only to acquire covalent bonded electron not others

I need help with the first question, if you can help with the other two I would really appreciate it!​

Answers

Answer:

5

Explanation:

Which part of the scientific process is a proposed answer to a question?

1. observation
2. experiment
3. hypothesis
4. results

Answers

Scientific processes are the steps that are done to research and draw conclusions. The results of the experiments are the proposed answer to a question. Thus, option 4 is correct.

What are the steps of the scientific process?

The scientific process initiates when there is a question that needs to answer and presented with observations and facts. It includes defining the question and making observations.

From the observations, the hypothesis is formed and an experiment is designed and conducted. From the research, the conclusion and the results are drawn.

Therefore, option 4. the proposed answer is called the result.

Learn more about the scientific process here:

https://brainly.com/question/22911053

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Answer:

Hypothesis

Explanation:

Hypothesis is an educated guess as to what the answer to the question is.

(*) Sorry for my late answer but I hope this helps others that are looking for this.

I got 100%   ;)

Propane is an alkene. Describe the test for alkenes. Give the colour change in the test.

Answers

Answer:

Explanation:

One test for Alkenes is testing with bromine water. This test can be used to tell the difference between an Alkanes and Alkenes. On a normal, any Alkene will turn brown bromine water to colourless because the bromine reacts with the double carbon-carbon bond. Also, the reaction takes place with unsaturated compounds that contains the double carbon-carbon bonds.

Conversely, when Alkanes go through the same test, there is no reaction with bromine water.

How do ecosystems change overtime

Answers

Answer:

Ecosystems, the interactive system of living and nonliving organisms in a specific location, change slowly over time. When new plants and animals arrive in an area, they either thrive or struggle. Thriving species sometimes displace native species. When this happens, the system as a whole begins to change.

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