2NH4Cl(aq) + CaO(s) —> __H2O (l) + CaCl2 (aq)

which expression completes the balanced equation?

Answer:

Written below. Hope this helps!

Explanation:

1. Why is water pollution happening? Water pollution occurs when huge bodies of water like groundwater, oceans, rivers, and lakes are contaminated with harmful chemicals and bacteria. This is due to the waste product directly thrown into the water.

2. What effects has water pollution had on the environment and human health? Contaminated water can harbor bacteria, such as those responsible for diarrhea, cholera, dysentery, typhoid, hepatitis A, and polio. According to the UN, every year, approximately 297,000 children under five die from diseases linked to poor sanitation, poor hygiene, or unsafe drinking water.

3. What are the possible, future effects of water pollution on the environment and human health? Population growth, economic development, urbanization, and climate change will have a big impact on water issues by 2050.

4. What is currently being done to solve water pollution? Working with public works departments to limit road salt use, to prevent chlorine from getting into the water. Helping businesses reduce their use of hazardous chemicals. Promoting agricultural land use practices that protect rivers and streams. Advising homeowners with fuel tanks on preventing dangerous spills.

5. Do you think water pollution is an environmental issue that needs to be solved? Water pollution needs to be solved because: Poor water quality has its most direct impact on aquatic wildlife, particularly fish, bugs, and plants. Excess nutrients, sediment, road salt, and other contaminants can reduce the variety and hardiness of organisms living in the state's waters.

6. What can your classmates do to help stop water pollution? How to help stop water pollution?

You can . . .

Answer:flooding

Explanation: people  keep on throwing their old belonging in the  drains and snack packs    and it clugging up

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D. Areas of high pressure to areas of low pressure.

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Answer:

They cannot reproduce

Answer:

Based on the given instructions, you need to calculate the expected kinetic energy (KE) at each velocity using the formula KE = mv^2, where m is the mass and v is the speed. The mass is given as 0.250 kg.

Table B: Calculation of Kinetic Energy (KE)

Table B: Calculation of Kinetic Energy (KE)

Speed (m/s)Mass (kg)KE (kg m^2/s^2)20.2500.50030.2500.75040.2501.00050.2501.25060.2501.500

To calculate the kinetic energy at each velocity, multiply the mass (0.250 kg) by the square of the velocity.

For example, when the speed of the bottle is 2 m/s: KE = (0.250 kg) * (2 m/s)^2 = 0.250 kg * 4 m^2/s^2 = 1.000 kg m^2/s^2

Perform similar calculations for the other velocities and record the results in Table B.

Answer:

Explanation:mass of the bottle in each case is M = 0.250 kg

now as per given speeds we can use the formula of kinetic energy to find it

1) when speed is 2 m/s

kinetic energy is given as

2) when speed is 3 m/s

kinetic energy is given as

3) when speed is 4 m/s

kinetic energy is given as

4) when speed is 5 m/s

kinetic energy is given as

5) when speed is 6 m/s

kinetic energy is given as

Answer: Tens place.

Step-by-step explanation: hmm wait one moment

Answer:

Yes

Explanation:

If an object is flat and it falls it will go against the air (Air-Resistance) when falling down, which it will make the block go slower then a sphere which has no sides and will fall faster then the square or Block because there isn't a flat side it wont go against the air ( Air-Resistance).

Answer:Gaseous CFCs can deplete the ozone layer when they rise due to ultraviolet radiation

Explanation:

Answer:

when chlorofloroucarbon drift upwards toward the stratospher ,they come in contact with the ozone layer .this leads to a chemical reaction where the cfcs the molecules are broken up by ultra violent radiation releasing chlorine atoms which are able to destroy ozone molecules

Answer:

im belive the answers fog

fog shsndndndndndndbdbdbdbdbdbdbdhdhxbf

Answer:

She was the first female African American to be certified by the American Board of Neurological Surgery.

Explanation:

She became the first female African American can to be certified.

Answer:

I believe this is a chemical formula

Explanation:

It's been a while since I've done chemistry. Sorry, this is late, and hope you still have time. Also sorry if this is wrong, but I Hope This Helps!

Answer:

B. a chemical formula

Explanation:

Answer:

Leaf: Hey Roots, this is Leaf. I'm running low on supplies here. Can you send some over?

Roots: Hey Leaf, of course. What kind of supplies do you need?

Leaf: I need more water and nutrients. Can you send some my way?

Roots: Sure thing, we'll get on it right away. How much do you need?

Leaf: Just enough to keep me going for a few more days. Can you also send some sunlight my way?

Roots: Sorry, we can't help with that one. But we'll make sure to send enough water and nutrients to help you out.

Leaf: Thanks, Roots. You're the best. Let me know when the delivery is on its way.

Roots: Will do, Leaf. Hang in there. Delivery should be there soon.

Answer:

96

Explanation:

Answer:

\(1.81 J/g*^{o}C\)

Explanation:

\(q = c_{p}*m*(T_{f} -T_{i})\)

\(q _{m}= c_{p}_{m}*27.0g*(25.1^{o}-100^{o})\)

\(\\\\q_{water} = c_{p}_{water*313 g*(25.1^{o} -22.3^{o})\)

\(q_{m} = - q_{water}\\\\c_{p}_{m}*27.0g*(25.1^{o}-100^{o}) = - 4.18 J/g*^{o}C*313 g*(25.1^{o} -22.3^{o})\)

\(c_{p}_{m}*2022.3 = 3663.352\\\\c_{pm}=1.81 J/g*^{o}C\)

Answer:

unbalanced

Explanation:

because two dogs are pulling it so it's not going to be in place?

Answer:

1 calcium, 2 oxygen and 2 hydrogen makes for a total of 5 atoms in 1 molecule.

Explanation:

Answer:

Negative

Explanation:

When a cell undergoes a redox reaction, there is a transfer of electrons from the anode to the cathode. Oxidation occurs at the anode and reduction occurs at the cathode. The cell voltage is defined as the difference between the electrode potential of the cathode and the electrode potential of the anode.

If the electrodes of the cell are well arranged, the cell potential will be positive indicating a spontaneous flow of electrons from anode to cathode. A negative cell potential indicates that the cell was not well arranged and that the positions of cathode and anode were interchanged.

Hence a negative value of cell potential shows a non spontaneous redox reaction.

Answer:

If an object is changing its velocity -whether by a constant amount or a varying amount

Explanation:

then it is an accelerating object. And an object with a constant velocity is not accelerating.

Answer:

the object can be accerleratting because the object supports it then later goes up for example a ball. if it supports that means its positive. if it has the weight like i mean by initially at rest. this means its negative. Hope this helps!

Explanation:

Answer:

Keep in mind this changes from microscope to microscope.

Explanation:

On most classroom microscopes, there will be two knobs on either side of the scope.  These will increase or decrease the height of the "stage", which is how you "focus" the microscope.  The larger knob will move the stage the most, and thus, is called the coarse focus.  The smaller knob is called the fine focus, and, you guessed it, will move the stage the least.  There are usually three "objective lenses".  Each will have a different magnification and will be listed on the lens itself.  It rotates around the "revolving nosepiece".  MAKE SURE THAT THE SLIDE IS LOWERED BEFORE ROTATING THE LENSES!!!!  If you don't you WILL break the slide and you WILL get death looks from the teacher.

On the stage, there are two clips.  They move NOT up and down, but they spin.  what you want to do is to move the slide into the clips.  They will not break if you do not bend them more than what the slide will bend them to.

The technique for focusing the microscope is really easy once you do it a few times.  After making sure that the microscope is plugged in and the light on and the slide and lens in the lowest position/magnification (!) move the coarse focus knob so that the object in the slide is just visible.  Once you do that, from there use the fine focus knob to make the object most visible.

These instructions vary slightly from model to model of microscope, but the picture below is very accurate and everything I warned you about is for all microscopes.

Observation: The man is walking his dog.

Interference: The dog must have saw something and started chasing after it, resulting in the owner being dragged along.

Observation: The man is walking his dog.

Interference: The dog must have saw something and started chasing after it, resulting in the owner being dragged along.

HOPE IT HELPS

Answer:

Motion is defined as a change of position. How we perceive motion depends on our frame of reference. Frame of reference refers to something that is not moving with respect to an observer that can be used to detect motion.

Explanation:

Answer:

A. oxygen

B. chlorine

2. iodine

(a) because aluminium is a soft malleable metal. it can be made to in sheets to form thin wrapping sheets. also, it does not react with food items.

(b) because metals are good conductors of heat and electricity. the immersion rod needs electric supply to get heated and to heat liquids.

(c)  they're kept in kerosene to keep them from coming in contact with oxygen and moisture as they react to form their hydroxides.

4. Magnesium is a metal. Metals react with oxygen to form metallic oxides. So Magnesium oxides are basic in nature. But nonmetals react with oxygen to form nonmetallic oxides. These oxides differ from metallic oxides because they are acidic in nature. Nonmetallic oxides react with water to form acids. Therefore, Sulphur dioxide is acidic in nature. Magnesium oxide is basic in nature.

5. Copper forms a green deposit on its surface when exposed to air which is usually a mixture of copper carbonate and copper hydroxide. It's acidic in nature.

Answer:

2.A

Explanation:

Answer:

A

Explanation:

A would be the best place due to the fact that it is the farthest distance from the fulcrum. Since the sheep (or the load) is at the very end of the pole, the effort (force) would need to also be at the end of it to lift the sheep the easiest.

Answer: 1) Chemical to mechanical (calories -> muscle contractions)

2) mechanical to mechanical (muscle -> motion)

3) mechanical to thermal (motion -> heat from the body causes sweating)

Explanation: When Pedro ate breakfast, he consumed the chemical energy, which is a form of potential energy, that was stored in his breakfast.  When he went for a run, that chemical energy transformed into mechanical energy, which is a form of kinetic energy.  That mechanical energy then transformed into thermal energy while he was running, which is how his temperature raised after he was finished running.  The energy in this system was conserved as it was transformed because the energy was constant.  As the energy was being transformed between different types, the total amount of energy remained unchanged.  

The potential energy stored in the body chemically. That potential energy is then released when the body  put in motion.

Answer:

friction

Explanation:

The rubbing of certain materials against one another can transfer negative charges, or electrons.

Answer:

Moist air

Explanation:

Answer:

A

Explanation:

bro