Change in state, change in color, and change in odor are three signs that a chemical reaction has taken place.
What is a chemical reaction?A chemical reaction is a process in which the atoms or molecules of one or more substances (known as reactants) are rearranged to form one or more different substances (known as products).
During a chemical reaction, chemical bonds between atoms are broken and new bonds are formed between different atoms. It results in the creation of new chemical compounds with unique properties.
Chemical reactions can be represented by chemical equations that show the reactants and products involved in the reaction. These reactions can be exothermic (releasing energy) or endothermic (requiring energy). They play a crucial role in various natural and industrial processes.
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Energy from food is measured in..
1) Joules
2) Watts
3) Calories
4) Kilograms
What happens if someone let's go of the button on an electric door bell
Releasing the button on a doorbell opens the electrical circuit, stopping the flow of current and the bell's sound. This action is similar to how a circuit breaker works, by cutting off the electric current to prevent a continuous ring or possible overloading.
When someone releases the button on an electric doorbell, the electrical circuit that was completed when the button was pressed becomes open. This happens because doorbells are typically operated by a push button switch, which controls the flow of electricity. As long as the button is pressed, the circuit is closed, allowing electrical current to flow through and activate the bell or buzzer. Once the button is let go, the circuit opens, the current stops flowing, and the doorbell sound ceases.
Additionally, this action is akin to a circuit breaker in the way it interrupts the electrical flow. The breaker's electromagnet becomes less strong without the current, which in turn releases the moving contact, breaking the circuit. Though an electric shock from a doorbell is highly unlikely due to the low voltage involved, it's important to remember safety protocols when handling electrical circuits to prevent shock, reminiscent of the "can't let go" effect described with more dangerous voltages.
Molecular weight of PbCl2 = 278 g/mole Mass of beaker + PbCl2 = 62.19 g Mass of beaker = 57.77 g Mass of PbCl2 per 100 mL = g Moles PbCl2 per 100 mL = [Pb-2] based upon this investigation = M [Cl-] based upon this investigation = M
Would you classify silicone as a element or compound
which factor would increase the carrying capacity for a white-tailed deer in an eastern temperate forest ecosystem
Answer:
Development of natural reserves of forest land and crack down on hunting
Explanation:
White-tailed deer also known as Virginia deer is a small to medium-sized deer common to North America, and South America. Deer coat is reddish-brown in spring and summer they turn grey-brown through the fall in winter. A resident of the temperate grasslands adapted themselves to open lands of prairie, and savanna woodlands. They commonly eat leguminous crops and forge on other crops including leaves, cacti, and shoots. They also eat acorns, fruit, and corn. Due to climate change and the influence of man majority of deer have migrated and the impact of diseases has also reduced the large deep population which can be overcome by rehabilitation programs so as their original habitats are ensured.Make the selection that best completes the sentence.
All of the planets in our solar system orbit the sun
A. in perfect circles
B. at the same speed
C. in an ellipse
D. at the same distance
Which would not be associated with stable atmospheric conditions
afternoon thunder showers is the answer
The correct answer is - afternoon thunder showers.
When we say stable atmospheric conditions it means that the atmosphere should be relatively calm, without having any disturbances in it. A nice example for a stable atmospheric conditions is a clear sunny sky and a calm wind. On the other hand, we have the afternoon thunder showers. The afternoon thunder showers are the total opposite of stable atmospheric conditions. When they occur, there's lot of disturbances, air pressures are mixing, the winds are changing speeds, heavy rainfall occurs, the air pressure changes rapidly, there's electrical charges, all in all creating a real mess in the atmosphere.
Answer:
afternoon thunder showers.
Explanation:
9. According to the map, where would the strongest winds be expected?
In the middle near Colorado.
what is the realtionship between the kentic energy of molecules in an object and the objects tempeture
Why are people against saving the ozone layer?
Which of the following situations is accurate regarding the transfer of heat? Thermal energy from the refrigerator is transferred to a hot pie.
An ice cube loses heat to a warm glass of water.
A warm cup of tea transfers heat to cold hands.
An open door on a freezer cools a warm room.
Final answer:
In the given situations, the accurate statement regarding the transfer of heat is: An ice cube loses heat to a warm glass of water.
Explanation:
Heat is the transfer of energy from an object with a higher temperature to an object with a lower temperature. In the given situations, the accurate statement regarding the transfer of heat is:
An ice cube loses heat to a warm glass of water.
When the ice cube comes into contact with the warm glass of water, heat energy is transferred from the water molecules in the ice cube to the water molecules in the glass, causing the ice cube to melt.
A plant grows toward the light because ________ in the plant cause some cells to grow longer than others.
What causes an element from the periodic table to be more or less reactive?
If the molecular mass of tetraoxosulphate(VI) acid is 98, calculate it's vapour density.
Is air pressure greater at the equator than at the north pole?
Which of the following describes a negative affect that global warming could have on plant life on Earth?
I. Increased levels of CO2 that are associated with global warming will allow plants to perform photosynthesis more efficiently. II. Global warming may cause drought conditions in some areas, which would limit the amount of water available to plants in those areas. III. Global warming may cause severe flooding in some areas, which could inhibit photosynthesis if a plant's leaves and stems are submerged. IV. Global warming can cause an increase in the growing season of plants, allowing them to reproduce more often.
Answer:
II. Global warming may cause drought conditions in some areas, which would limit the amount of water available to plants in those areas.
III. Global warming may cause severe flooding in some areas, which could inhibit photosynthesis if a plant's leaves and stems are submerged.
Explanation:
Global warming is one of the effects of climate change. It is simply the warming of the surface of the earth as result of increase in temperature on the earth surface.
Global warming results from increase in levels of greenhouse gases in the earth's atmosphere. These gases prevents radiation from leaving the earth surface thereby leading to increase in temperature. The more the gases, the more the spike in temperature.
This increase in temperature can lead to drought.
As the earth also warms, polar ice can melt which can increase the level of water in the world's oceans and then flooding of coastal areas.
Explanation - Global warming is an increase in the surface air temperature of the Earth. Human activities such as the burning of fossil fuels are contributing to a current episode of global warming. Many scientists predict that current global warming will cause an increase in extreme weather conditions, such as flooding and drought.
Drought conditions limit the amount of water available to plants. Plants cannot live without sufficient water. On the other hand, too much water can cause excessive flooding, which can inhibit photosynthesis in plants if a plant's leaves and stems are submerged.
Increasing CO2 levels and increasing growing seasons are both positive effects that global warming could have on plant life on Earth.
balance the following chemical equations identify the type of reaction n2+f2–>nf3
Balance the chemical equations reaction n2+f2–>nf3 is 3N2 + 3F2 → 6NF3
To balance the chemical equation N2 + F2 → NF3, we need to make sure that there are equal numbers of each type of atom on both sides of the equation. Let's go through the steps to balance this equation:
1. Start by counting the number of atoms on each side of the equation. On the left side, we have 2 nitrogen (N) atoms and 2 fluorine (F) atoms. On the right side, we have 1 nitrogen (N) atom and 3 fluorine (F) atoms.
2. To balance the nitrogen atoms, we need to put a coefficient of 2 in front of NF3 on the right side. This gives us 2 nitrogen atoms on both sides.
N2 + F2 → 2NF3
3. Now let's check the number of fluorine atoms. On the left side, we have 2 fluorine (F) atoms, and on the right side, we have 6 fluorine (F) atoms.
4. To balance the fluorine atoms, we need to put a coefficient of 3 in front of F2 on the left side. This gives us 6 fluorine atoms on both sides.
3N2 + 3F2 → 6NF3
Now the equation is balanced, with equal numbers of nitrogen and fluorine atoms on both sides.
In terms of the type of reaction, this is a synthesis or combination reaction. In a synthesis reaction, two or more reactants combine to form a single product. In this case, nitrogen gas (N2) and fluorine gas (F2) react to form nitrogen trifluoride (NF3).
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Heat will flow from a hot object to a cold object until the objects reach A. stability. B. boiling point. C. collapse. D. equilibrium.
Can nonsmokers hold their breath longer than people who smoke? Write the independent variable, the dependent variable, and the hypothesis.
How would you best describe the texture of an igneous rock that formed extremely slowly underground
Answer;
Pegmatitic
Explanation;
-The texture of igneous rocks can be analyzed by geologists to understand the manner in which the rock became solid or crystallized from liquid, or how it is a melted rock. A pegmatitic texture is one in which the mineral grains are exceptionally large.
-Igneous rocks may be identified by determining their composition and texture. Once the two characteristics have been identified, the Igneous Rock Identification chart is used to identify the name of the rock.
What causes the Coriolis effect?
A. the different air movements north and south of the equator
B. the rotation of the earth on its axis
C. winds spinning off the equator
D. the friction that slows down winds near the earth's surface
Which statement about trade during the period of the Roman Empire is correct? A. Trade supplied Romans with exotic goods and helped spread new ideas. B. Trade was confined to food staples transported over short distances. C. Most of the empire's outlying territories refused to trade with Rome. D. A lack of paved, well-maintained overland routes hampered Roman trade.
Option A i.e Trade supplied Romans with exotic goods and helped spread new ideas is the correct answer.
The Roman Empire was the center of trade between the East and the West. Besides trade of goods, the trade helped Spread new ideas and culture of East and the West in the Rome. So Trade routes were dissemination of new ideas and culture in the past.
when 2.85 moles if chlorine reacts with excess tin hiw many moles of tin(IV)chloride are formed
When 2.85 moles of chlorine reacts with excess tin, 1.425 moles of tin(IV) chloride are formed.
Stoichiometry Calculation
To solve this problem, we need to use the balanced equation for the reaction between chlorine (Cl₂) and tin (Sn) to form tin(IV) chloride (SnCl₄):
Sn + 2Cl₂ → SnCl₄
This equation tells us that 1 mole of Sn reacts with 2 moles of Cl₂ to produce 1 mole of SnCl₄. In this case, chlorine gas is in excess, meaning tin is the limiting reactant.
Steps:
First, determine the number of moles of chlorine gas available: 2.85 moles of Cl₂.From the balanced equation, 2 moles of Cl₂ react to form 1 mole of SnCl₄.Therefore, the moles of SnCl₄ formed can be calculated by dividing the moles of Cl₂ by 2:Moles of SnCl₄ = 2.85 moles Cl₂ / 2 = 1.425 moles of SnCl₄
So, when 2.85 moles of chlorine reacts with excess tin, 1.425 moles of tin(IV) chloride are formed.
What kind of boundary is shown in the image below?
Just did this
the answer is divergent.
just got done doing this haha its divergent
Which of the following changes the solid Earth the most?
From which sphere does most water evaporate
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List four ways you can avoid injury while using HCl and three steps you would take in case of an accidental exposure to HCl need the answer asap
Answer:
Explanation: Four ways you can avoid injury while using HCl -
a) It's concentrated form is highly toxic so better use in the experiment hood.
b) Don't inhale its fumes.
c) Use lab coat while performing experiments.
d) Protect your eyes by wearing eye glare.
Three steps you would take in case of an accidental exposure to HCl -
a) Inform the lab assistant and teachers regarding the mishap.
b) Don't try to use any kind of ointment or medicated thing on the affected area without any medical advice.
c) You can use sodium bicarbonate to neutralize it.
Precipitation will increase in areas where there is A) less transpiration and less run-off. B) lower temperatures and more evaporation. C) lower temperatures and less evaporation. D) higher temperatures and more evaporation. Submit
Which of the following statements correctly describes the make-up and function of genes?
Genes are made of DNA and are carried on chromosomes.
Genes are not made of DNA, but they are carried on chromosomes.
Genes are made of chromosomes and carried on DNA.
Genes are not made of chromosomes but are carried on DNA.
Answer:
Genes are made of DNA and are carried on chromosomes.
What has MOST LIKELY caused a change in the soil in the wheat field shown? A) crystallization B) erosion C) sedimentation D) weathering
Erosion, i took the test