Pls help with science

Pls Help With Science

Answers

Answer 1
The answer is C because it is believed that those two were once connected

Related Questions

Combustion engines became common in the mid-1800s when people began to use them to power ships, trains, and
machinery in factories. Combustion engines add carbon dioxide to the air, and as a result, carbon dioxide in the
atmosphere increased quickly. How did this change the total amount of energy in the Earth system, and how did this
change happen? How did this affect global average temperature?

I need help please and don’t send the fake link): < just to get points

Answers

Answer:

The correct answer is - increased the global average temperature.

Explanation:

Combustion is the process that increases the carbon dioxide in the atmosphere, which results in entering more energy into the Earth system than existed from it.  Therefore, the amount of energy increased in the system of the earth or surface of the earth.

The reason behind it is that carbon dioxide trapped and redirects energy back toward the Earth's surface, which is absorbed by Earth's surface and surface increased, and global average temperature increased.

Combustion process increases the global average temperature of the earth by absorbing and emitting the energy revert back to earth.

What is combustion?

Combustion is a process exothermic process in which organic molecules burns in the presence of oxygen to produce energy in the form of heat and light and CO₂ gas.

CO₂ gas is a green house gas which traps the energy of the atmosphere and revert back it into the earth surface, due to which temperature of the earth surface and atmosphere increases which results in the elevation of global average temperature.

Hence, combustion increases the global average temperature.

To know more about combustion, visit the below link:

https://brainly.com/question/15246277

Magnesium bromide is an ionic compound with the chemical formula MgBr2, Magnesium is

Answers

Answer:

These are Magnesium bromide is MgBr2. “ionic compounds.” When atoms join together, they form either molecules or ionic compounds, depending on whether they are joined by covalent bonds or ionic bonds. ... When atoms join together by ionic bonds, they form “ionic compounds”.

Explanation:

Hope it helps u

FOLLOW MY ACCOUNT PLS PLS

What would happen to an impulse if a neuron cannot produce chemicals at a synapse?

Answers

Answer:

Explanation: he axon releases chemicals called neurotransmitters. Neurotransmitters travel across the synapse between the axon and the dendrite of the next neuron. ... The binding allows the nerve impulse to travel through the receiving neuron

You have 1 1/2 moles of 1 kg bottles of O2. What is the mass of O2 that you have?
A. 9.033x10^23 kg
B. 9.033x10^23 atoms
C. 1.80x10^27 kg
D. 1.806x10^24 moles

It is not B as I have already tried it :(

Answers

Answer:

A: 9.033 × 10^(23) kg

Explanation:

According to avogadro's number, we know that;

1 mole = 6.022 × 10^(23) kg

Thus;

1½(1.5) mole of O2 will produce;

(1.5 × 6.022 × 10^(23))/1 = 9.033 × 10^(23) kg

Looking at the options, the correct one is Option A.

____ are made up of solutes and solvents

A.Suspension
B.Colloid
C.Solutions

Answers

I think it is A if wrong I’m sorry

What kind of elements are on the left side of the zig-zag line on the periodic table? ​

Answers

Answer:

Metals are found to the left of the zigzag line on the periodic table. B. Nonmetals Nonmetals are found to the right of the zigzag line on the periodic table.

Explanation:

As the loudness of the sound input increases, the up and down motion of the membrane covering the can _________
increases
decreases
stay the same

Answers

Answer:

decrease!

Explanation:

The fact that loudness of the sound input increases, its starts to move. Each movement pushes the membrane down. Therefore, it decreases. Your welcome !

and a 40N Torce in a southeriy direction?
4. A car works harder to accelerate from 0 to 10km/hr than it does to maintain a 10km/hr speed. Why is this? A. b/c
static friction is harder to overcome than kinetic or rolling friction. B. b/c static friction is easier to overcome than
kinetic or rolling friction. C. b/c static friction is harder to overcome than potential energy. D. b/c static friction is
easier to overcome than gravity.

Answers

Answer:

C.

Explanation: because potential energy is the starting point before it moves. nothing has to be done.

If the average rate of sediment accumulation is 3 cm/1000years, how long would be required for sediments to completely bury seamounts 1.5 km high and convert part of the oceanic ridge into a part of the abyssal plains. (Show your work).

Answers

Answer:

500,050000 years

Explanation:

Given that :

Rate of Accumulation = 3cm/ 1000 years

Height of seamounts = 1.5km

Representing height of seamounts in cm;

(1.5 *1000 * 100) = 1500150 cm

Time taken = height / rate

Time taken = (1500150 cm / 3cm) * 1000

Time taken = 500,050000 years

Si desea preparar 300 gramos de una solución de azúcar en agua que tenga una concentración de 20% m/m en cuanto gramos de soluto de azúcar se necesita?

Answers

Answer:

[tex]m_{soluto}=60g[/tex]

Explanation:

¡Hola!

En este caso, al considerar la unidad de concentración de porcentaje masa/masa, podemos escribir su fórmula como:

[tex]\%m/m=\frac{m_{soluto}}{m_{solucion}}*100\%[/tex]

Podemos identificar la masa de soluto (azúcar) como la incógnita, y resolverla como se muestra a continuación:

[tex]m_{soluto}=\frac{\%m/m*m_{solucion}}{100\%}\\\\m_{soluto}=\frac{20\%*300g}{100\%}\\\\m_{soluto}=60g[/tex]

¡Saludos!

A 2.5-liter sample of a gas has 0.30 mole of the gas. If 0.15 mole of the gas is added, what is the final volume of the gas? Temperature and pressure remain constant.

Answers

Answer:

1.125

Explanation:

I think it is his because if you add 0.30 and 0.15 it adds up to 0.45 so you just multiply 0.45 and 2.5 and then it gives you 1.125. HOPE IT HELPS.

Please help!! I have 10 minutes left!!

Answers

Answer:

I believe it is hydrogen for the first and methane for the second.

Explanation:

Answer to 8: The most dangerous or harmful gas to humans in the atmosphere would be carbon dioxide. But reserchers have found that methane levels in ancient air samples and found that scientists have been vastly underestimating the amount of methane humans are emitting into the atmosphere via fossil fuels.

Answer to 7: The type of gases present are as critical to density as elevation and gravity, and all are interrelated. Certain atmospheric gases will create thick atmospheres. For example, atmospheres with abundant hydrogen tend to be thicker as gases will combine with hydrogen for greater mass.

Hope this helps!

Which step do you use first to calculate the number of grams of FeCl2 produced when starting with 30.3 g of Fe in this reaction?

Answers

Answer:

I dont care I want pionts

What is a solution?
a

a homogeneous mixture with particles between .01 and 1 nm
b

a homogeneous mixture with particles smaller than .01nm
c

a heterogeneous mixture with particles between .01 and 1 nm
d

a heterogeneous mixture with particles smaller than .01nm

Answers

It’s definitely c! Hope this helps

Can someone help me with this question.

I’ll mark brainliest

Answers

Answer:

sodium carbonate im pretty sure (the formula is Na2CO3)

Explanation:

hope this helps :))

Explain how surface waves work.

Answers

Surface waves get pulled in by the tired after the moon has come out the moon has a gravitational pool towards the waves

What do you think happens to the cells when they do not get the oxygen they need? Why?

Answers

Answer:

the cells start to deteriorate

Explanation:

the lack of oxygen to your body and cells will cause them to break down.

How many grams in 4.50 moles of NaNO3?

Answers

Answer:

382.5 grams

Explanation:

Find the molar mass of NaNO₃ and then multiply the number of moles by that molar mass :)

Which organ is most directly involved in the excretion of waste products? Please help

Answers

Answer:

Explanation:

The liver

Answer:

Kidney

Explanation:

The nucleus of an atom is positively charged​

Answers

Answer:

It's because of the presence of protons.

Explanation:

A nucleus of an atom has protons and neutrons. We know that a proton has a charge of

+

1

, while a neutron has no charge, or

0

. Therefore, the nucleus of an atom will always have a positive charge.

The catalytic conversion of ammonia to nitric oxide is the first step in a three-step process, which ultimately results in nitric acid. Balance the equation for the reaction. NH3(g) + O2(g) → NO(g) + H2O(g)
a. 2, 1, 2, 1
b. 3, 2, 3, 3
c. 4, 3, 2, 6
d. 4, 5, 4, 6​

Answers

The answer is B- 3,2,3,3

The balance equation for the reaction is

4NH₃(g) + 5O₂(g) —> 4NO(g) + 6H₂O(g)  

The coefficients are 4, 5, 4, 6

Option D. 4, 5, 4, 6​ gives the correct answer to the question.

From the question given above, we obtained:

NH₃ + O₂ —> NO + H₂O

The above equation can be balance as illustrated below:

NH₃ + O₂ —> NO + H₂O

There are 2 atoms of H on the right side and 3 atoms on the left side. It can be balance by writing 4 before NH₃ and 6 before H₂O as shown below:

4NH₃ + O₂ —> NO + 6H₂O

There are 4 atoms of N on the left side and 1 atom on the right side. It can be balance by writing 4 before NO as shown below:

4NH₃ + O₂ —> 4NO + 6H₂O

There are 2 atoms of O on the left side and a total of 10 atoms on the right side. It can be balance by writing 5 before O₂ as shown below:

4NH₃(g) + 5O₂(g) —> 4NO(g) + 6H₂O(g)

Now, the equation is balanced.

The coefficients are 4, 5, 4, 6

Thus, Option D. 4, 5, 4, 6​ gives the correct answer to the question.

Learn more: https://brainly.com/question/24898561

Really need help with the rest of them, please it's due in 20 minutes

Answers

Answer:

chlorine is for pool

Explanation:

hope is help

What are the protons neutrons and electrons of Vanadium-52 +3 charge
HELP

Answers

Answer:

Protons: 23

Neutrons: 28

Electrons: 23

I THINK

Explanation:

2Fe(OH)3 Fe2O3+3H2O how many grams of Fe2O3 are produced if 10.7 grams of Fe (OH)3 react in this way

Answers

Answer: 7.98 grams of [tex]Fe_2O_3[/tex] are produced if 10.7 grams of [tex]Fe(OH)_3[/tex] are reacted.

Explanation:

To calculate the number of moles, we use the equation:

[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex]      .....(1)  

Putting values in equation 1, we get:

[tex]\text{Moles of} Fe(OH)_3=\frac{10.7g}{106.87g/mol}=0.100mol[/tex]  

The chemical equation for the reaction is

[tex]2Fe(OH)_3\rightarrow Fe_2O_3+3H_2O[/tex]

By Stoichiometry of the reaction:

2 moles of [tex]Fe(OH)_3[/tex] produce = 1 mole of [tex]Fe_2O_3[/tex]

So, 0.100 moles of [tex]Fe(OH)_3[/tex] produce= [tex]\frac{1}{2}\times 0.100=0.05mol[/tex] of [tex]Fe_2O_3[/tex]  

Mass of [tex]Fe_2O_3[/tex] =[tex]moles\times {\text{Molar Mass}}=0.05mol\times 159.69g/mol=7.98g[/tex]  

Hence 7.98 grams of [tex]Fe_2O_3[/tex] are produced if 10.7 grams of [tex]Fe(OH)_3[/tex] are reacted.

Element X is a solid at room temperature.
It needs one electron per atom to gain the electronic structure of a noble gas.
It is the least reactive element in its group.
What is the element X?

1.At
2.Cs
3. F
4. Li​

Answers

Answer:

Element X is Cs or cesium

Commercially available cold packs are simple in design: a pouch with water on one side, isolated by a barrier from a specific salt on the other side. When the barrier is broken, the salt and water mix and the solution turns cold. Select which of the statements is true about the reaction occurring in cold packs. O The reaction between the salt and water is endothermic. O The reaction between the salt and water is exothermic. O The reaction between the salt and water is neither endothermic nor exothermic. The cold pack releases heat into the environment. #8

Answers

Answer:

The reaction between the salt and water is endothermic.

Explanation:

The reaction is endothermic because the reaction absorbs heat and causes the surroundings to become cooler.

The first asteroid to be discovered is Ceres. It is the largest and most massive asteroid is
our solar system’s asteroid belt, having an estimated mass of 3.0 x 1021 kg and an orbital
speed of 17900 m/s. Determine the amount of kinetic energy possessed by Ceres.

Answers

Answer:

kinetic energy possessed by Ceres = 4.806 × 10^(29) J

Explanation:

We are given;

Estimated mass; m = 3 × 10^(21) kg

Orbital speed; v = 17900 m/s

Formula for kinetic energy is;

K.E = ½mv²

K.E = ½ × 3 × 10^(21) × 17900²

K.E = 4.806 × 10^(29) J

Thus;

kinetic energy possessed by Ceres = 4.806 × 10^(29) J

Describe the skier function of the law of conservation of energy

Answers

Answer:

Energy can't be created nor destroyed but it can be transformed

Explanation:

how would you revise the stimulation so users can evaluate the role of human activity in the pH of the ocean

Answers

Answer:

Explanation:

If only one parameter can be changed in the simulation, it would be the global temperature. Human activities cause global warming and the temperature rise has caused the polar ice cap to melt. With more fresh water going into the oceans due to melting ice cap, there is a big impact on the pH.

Answer:

Explanation:

increase CO2 in atmosphere - human activity like driving cars n burning fossil fuel releases air polluntants. CO2, NOx n SO2 are all soluble in water n form acids. of the 3, CO2 is the most common pollutant n has the most effect on the pH in oceans.

Fill in the chart with the following words:
- Potential energy
- kinetic energy
- Chemical energy
- Joules
- Energy
- thermal energy

Answers

Answer:

                      Energy

potential energy        kinetic energy

chemical energy         thermal energy

                                                                   joules

Explanation:

chemical energy is a type of potential energy or stored energy. Heat is a kinetic energy and energy is measured in joules.

The first box is energy. It can be divided into kinetic energy in one side and potential energy in the other side. Here, kinetic energy can be converted to the thermal energy and potential energy can be converted to chemical energy. They are measure in Joules.

What are various forms of energy ?

Potential energy and kinetic energy are two forms of energy that are commonly encountered in physics.

Potential energy is energy that an object possesses due to its position, shape, or state. An object can store potential energy when it is moved away from its equilibrium position, such as when a spring is stretched or a book is lifted to a certain height above the ground.

The amount of potential energy an object has is proportional to its mass, height, and the strength of the force that is acting on it. The average kinetic energy of an object is called its thermal energy.

Therefore,  first box is energy. It can be divided into kinetic energy in one side and potential energy in the other side. Here, kinetic energy can be converted to the thermal energy and potential energy can be converted to chemical energy. They are measure in Joules.

Find more on potential energy:

https://brainly.com/question/11749818

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