Chemistry
Chemical reactions, stoichiometry, molecular structures, and element properties.
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4. which process shows a physical change only? a) burning coal b ) rust…
* **Question 4:** D) Boiling water into steam * **Question 5:** A) Photosynthesis in plants * **Question 6:** B) Salt (NaCl) * **Question 7:** A) A solid precipitate forms
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1. which of the following is evidence that a chemical reaction has occu…
1. **A** (Milk turning sour) 2. **A** (Ash, smoke, and gases) 3. **D** (Mass is neither created nor destroyed, only rearranged)
- what can the reader learn about by studying the implicit meaning in a p…
- read the excerpt from \tools of the spymaster.\ james jays invisible in…
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15. study the diagram below and answer the questions that follow. \\(\\…
### (a) Identify reagent X **Water** (or \(\text{H}_2\text{O}\)) --- ### (b) Draw the structural formula of gas Y \[\text{H}-\text{C}\equiv\text{C}-\text{H}\] --- ### (c) What nam…
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12. a gaseous hydrocarbon was found to decolourise an acidified potassi…
### a) Structural formula of Q: ```text H H H | | | H - C - C = C - H | H ``` *(or written condensed as \(\text{CH}_3\text{CH}=\text{CH}_2\))* ### b) Homologous series: Alkenes ##…
- question 31 what factors are involved when it comes to forming relation…
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9. study the reaction below and answer the questions that follow. \\(\\…
### 9. * **(a)** \(\text{H}_2\text{O}_{(\text{l})}\) (Water) * **(b)** Water acts as a proton (\(\text{H}^+\)) donor, donating an \(\text{H}^+\) ion to \(\text{NH}_3\) to form \(\…
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1. study the information in the table below and answer the questions th…
### 1. * **a) Which salts crystallized out? Give a reason.**
- what is the \\(\\text{h}^+\\) concentration in a solution with a \\(\\t…
- question 20 (1 point) which of the following represents an exothermic r…
- the average speed of helium at 25°c is 1255 m/s. convert this speed to …
- express the following in scientific notation, using the correct number …
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sa science guys, mamili kayo ng isang project topic: - eco-friendly cle…
### Chosen Topic: Creating Homemade Bath Bombs 1. **Research Report:** The fizzing is caused by an acid-base neutralization reaction between sodium bicarbonate (base) and citric a…
- which of these were achievements of ancient indian civilization? develo…
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which sentence has correct semicolon usage? select the best answer. ans…
Now, she reaches adulthood; she believes that something fantastic might happen.
- 5. calculate the partial pressure of each gas and the total pressure fo…
- 4. vessel a contains co gas at 0°c and 1 atm. vessel b contains so2 gas…
- 1. when a potassium chlorate sample was heated in the presence of a cat…
- bulnesol is a key ingredient of oil of guaiac, a fragrance. ratcliffe, …
- bulnesol is a key ingredient of oil of guaiac, a fragrance. ratcliffe, …
- you are working in the kitchen and using profresh wash to treat produce…
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b. identify reaction type: 1. burning of magnesium ribbon 2. rusting of…
### B. Identify Reaction Type: 1. **Burning of magnesium ribbon**: Combination Reaction (Oxidation / Combustion) 2. **Rusting of iron**: Combination Reaction (Oxidation / Corrosio…
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chapter 1: electricity a. numerical practice: 1. calculate current if \…
### Chapter 1: Electricity * **A. Numerical Practice:** 1. Current = \( 6\text{ A} \) 2. Current = \( 2\text{ A} \) 3. Power = \( 440\text{ W} \) * **B. Thinking Skill:** Plastic …
- read the excerpt from a poem a student wrote i saw a man who had a dog …
- select all the correct answers. the map shows the nile delta, the regio…
- what is the mole ratio of n2 to h2 in this reaction?
- which of the following statements about pesticides and residue is false…
- vygotsky believed that learning primarily occurred through ______. a. s…
- kohlberg believed people shift back and forth between the six schemas i…
- initial-rate data at a certain temperature is given in the table for th…
- consider the following rate law. \\ \\text{rate} = k\\text{a}^x \\ dete…
- the reaction \\ a + b \\longrightarrow c + d \\quad \\text{rate} = kab^…
- consider the reaction and its rate law. \\4\\text{a} + 2\\text{b} \ igh…
- time and concentration data were collected for the reaction \\(a \ ight…
- classify the actions based on how they could affect a reaction rate. ra…
- review the text. then, select the three details that best develop an ob…
- read the excerpt from an immense world: how animal senses reveal the hi…
- which information must be included on a hazardous chemical label? (sele…
- which statement about the hazard communication standard is true? select…
- how does osha define a hazardous chemical? select the correct answer an…
- which statement best describes the purpose of your organizations hazard…
- according to the occupational safety & health administration (osha), wh…
- what standards has osha established to reduce the risk of unexpected re…
- what is the definition of a \process\ in the context of process safety …
- which industries are primarily impacted by the process safety managemen…
- use the drop-down menu to complete the sentence. when 1 carbon atom com…
- use the drop-down menu to complete the statement. an element is made up…
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\\delta h_3 = -741\\text{ kj mol}^{-1} calculate the value of \\delta h…
### (i) What is the difference between the two operations? **Operation A** is a physical process that produces a **mixture** (where iron and sulfur retain their individual propert…
- question 11 (5 points) the smallest unit of an element that has all of …
- question 10 (5 points) the names of the compounds \\(\\text{fes}\\), \\…
- adding up all of the ______ of all of the individual atoms within one m…
- which of the following chemical equations is balanced? a) \\(\\text{nh}…
- sodium and chlorine combine to form table salt, also called sodium chlo…
- which of the following would increase the rate of a chemical reaction b…
- a substance that turns litmus paper blue and contains hydroxide ions is…
- which of the following accurately describes properties of valence? a) n…
- a chemical reaction in which compounds break up into simpler constituen…
- success in welding is achieved by what? (select all that apply.) the sk…
- timber from the back of a truck: use correct manual handling techniques…
- complete the rhyme scheme: \oh, thats the paradise-in-bloom, i said a a…
- complete the rhyme scheme: \julia and i did lately sit, a playing for s…
- identifying rhyme scheme use the drop-down menus to finish marking the …
- the ph of a solution is a measure of the quantity of hydrogen atoms (h)…
- 1 multiple choice 20 points weathering, or the breaking down of rock ma…
- if the poh of vinegar is 9.45, what is its \\(\\text{oh}^-\\)? round to…
- key knowledge liquid water is denser than solid ice (at \\(0^\\circ\\te…
- students instructions introduction this assessment activity requires yo…
- 47 multiple choice 2 points which of the following is not one of the ma…
- question 17 sarai works at a technological company where there is gener…
- question 19 roberta has to assign a project today that involves masteri…
- 3 - organizational designs and structures learning objective: classify …
- \\(\\text{i}_2 = 0.350\\text{ m}\\), \\(\\text{cl}_2 = 0.350\\text{ m}\…
- which of the following statements describe the conditions of the \curre…
- \\2\\text{no}(\\text{g}) + \\text{o}_2(\\text{g}) \ ightleftharpoons 2\…
- \\2\\text{no}(\\text{g}) + \\text{o}_2(\\text{g}) \ ightleftharpoons 2\…
- i. \\(\\text{h}_2(\\text{g}) + \\text{i}_2(\\text{g}) \ ightleftharpoon…
- i. \\(\\text{h}_2(\\text{g}) + \\text{i}_2(\\text{g}) \ ightleftharpoon…
- i. \\(\\text{h}_2(\\text{g}) + \\text{i}_2(\\text{g}) \ ightleftharpoon…
- which of the following would a practitioner recommend as a treatment fo…
- one treatment option for pagets disease is _______ multiple choice brac…
- a recommendation to prevent osteoporosis is ______. multiple choice wea…
- a balloon that had a volume of 3.50 l at 25.0°c is placed in a hot room…
- five gases combined in a gas cylinder have the following partial pressu…
- what are the variables for this piston? temperature only temperature an…
- which equation below represents charless law? \\(\\frac{v_1}{t_1} = \\f…
- which law is based on the graph that is shown below? volume pressure bo…
- which equation represents the combined gas law? \\(p_1 v_1 = p_2 v_2\\)…
- the incomplete table below shows selected characteristics of gas laws. …
- which law states that the pressure and absolute temperature of a fixed …
- if the atmospheric pressure on the top of a mountain is 0.2396 atm, wha…
- how many atm are in 1,520 mmhg? 0.500 atm 2.00 atm 15.0 atm 203 atm
- carbon _________ is a colorless, odorless, and poisonous gas. a monoxid…
- the pressure inside a gas cylinder is 3,506 mmhg. how many atmospheres …
- how many mmhg are in 1.6320 atm? 12.241 mmhg 165.36 mmhg 465.69 mmhg 1,…
- which conditions are equal to stp? \\(30^\\circ\\text{c}\\), \\(100\\te…
- which sequence describes the result of increasing the number of gas par…
- why does a plastic bottle that is sealed at a high altitude change its …
- which unit of pressure is derived from the early barometers used to mea…
- if the pressure of a gas is 2.42 atm, what is its pressure in kpa? 0.00…