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Answer:
I think is the last one!!!! punnet square ⬜
Wendy wants to find out if a substance is an acid or a base. What are two ways that Wendy could
investigate to find out what kind of substance it is?
Without tasting a colorless liquid, an acid or a base can be determined using indicators.
The three most common indicators to test for acids and bases are: Litmus. Methyl orange. Phenolphthalein.
How do you know something is an acid?One practical method for determining how acidic something is is to use the pH scale. A solution is acidic if its pH is less than 7. If the pH of the solution is 7, it is neutral; if the pH is greater than 7, it is basic.To identify acids and bases, two types of litmus paper are available: red litmus paper and blue litmus paper. When exposed to acidic conditions, blue litmus paper turns red, while red litmus paper turns blue when exposed to basic or alkaline conditions.
To learn more about : Indicators
Ref : https://brainly.com/question/2815636
#SPJ2
Who discovered the nucleus?
Which energy transformation describes what occurs in a circuit? (select
the BEST answer)
chemical --> electrical --> light
thermal --> chemical --> light
electrical --> thermal --> light
Olight --> thermal --> chemical
Answer:
electrical --> thermal --> light
Explanation:
Answer:
electrical--> thermal--> light
What is the most basic level of biological organization?
Question 1 options:
Organism
Cell
Molecule
Atom
Answer:
molecule
Explanation:
Answer:
c
Explanation:
explain what keeps the electrons confined in the space surrounding the nucleus
Answer:
Electrons are trapped inside the atom because of the attraction forces with positively charged protons that are found in the nucleus.
Which statement about copper, diamond, and silicon(IV) dioxide is correcta)Copper and silicon(IV) dioxide have similar electrical conductivityb)In diamond the carbon atoms are covalently bonded as flat sheetsc)In silicon(IV)dioxide the silicon and oxygen atoms are covalently bonded in flat sheetsd)The structure of copper includes a lattice of positive ions
Answer:
In diamond the carbon atoms are covalently bonded as flat sheets
In silicon(IV) dioxide the silicon and oxygen atoms are covalently bonded in flat sheets
The structure of copper includes a lattice of positive ions
Explanation:
Diamond and silicon(IV) dioxide are covalent network solids. Covalent network solids are made up of atoms joined to one another by covalent bonds to form a giant lattice, The solids are hard and have a very high melting point. They do not conduct electricity. So, for both diamond and SiO2, atoms are covalently bonded to yield flat sheets in a covalent bonded network solid.
Copper is a metallic substance having metallic bonds, a metallic crystal consists of positive ions and a cloud of electrons.
Predict: In each "Climate type" box, Highlight the condition you think will lead to the fastest weathering for the given weathering type.
Weathering type
Climate type
Frost wedging
Hot
Cold
Wet
Dry
Clay formation
Hot
Cold
Wet
Dry
Dissolving
Hot
Cold
Wet
Dry
Answer:
Frost Wedging - Hot and dry
Clay Formation - Cold and Wet
Dissolving - Cold, and dry
Explanation:
The frost wedging happen when the climatic condition is hot and dry. The dry weather compensates the heat and the rock wedging happens quickly. For clay formation the weather has to be cold and wet. The cold weather will make the sand indulge with rock particles resulting in the clay formation.
What is your observation of the relationship between m and a
Answer:
They are both letters?
Explanation:
I need help I'll mark you as Brainliest
Answer: c
Explanation:
HELPP!! I REALLY NEED TO BRING UP MY SCIENCE GRADE!!!!
Scientists studied the location of ____ to determine plate boundaries.
Answer:
Of earthquakes
Explanation:
A scientist is comparing 2 samples of the same compound. One is pure and the other is impure. The compound is a solid at room temperature. Explain how the scientist could tell which is the pure compound. [2]
Answer:
A glass of mineral water is not pure water.
Explanation:
Pure chemical substances
Pouring water into a glass from a bottle
Food and drink may be advertised as ‘pure’. For example, you may see cartons of ‘pure orange juice’ or ‘pure mineral water’. This means that nothing else was added to the orange juice or mineral water during manufacture. However, these substances are not pure to a scientist. In science, a pure substance contains only one element or compound.
Mineral water is mostly water, but there are other substances mixed with it. These are the ingredients that you see listed on the bottle’s label.
Plants absorb water in the soil through their roots and pump this water up to deliver
nutrients to their leaves. This pumping is driven by the evaporation of water through
small pores on the undersides of leaves. What is this process called?
A)germination
B)pollination
C)respiration
D)transpiration
what conversion factor is needed to calculate the number of atoms in 8.6 moles of Aluminum?
A. 1 mole/ 6.02x10^23 atmos
B. 6.02X10^23 atoms/ 1 mole
C. 1 mole/ 26.98zg
D. 26.982g/ 1 mole
Answer:hey did you ever get an answer? I need it for this exam
Explanation:
Helppp
me plzzz!!!!
Answer:
Explanation:
The sound waves are bocing off the walls.
N2 + 3H2 → 2NH3 How many grams of hydrogen are necessary to react completely with 853.42g of nitrogen in the above reaction?
Answer: 182.87 grams of hydrogen are necessary to react completely with 853.42g of nitrogen.
Explanation:
The balanced chemical reaction is :
[tex]N_2+3H_2\rightarrow 2NH_3[/tex]
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex]
[tex]\text{Number of moles of nitrogen}=\frac{853.42g}{28g/mol}=30.479moles[/tex]
According to stoichiometry:
1 mole of [tex]N_2[/tex] react with = 3 moles of [tex]H_2[/tex]
30.479 moles of [tex]N_2[/tex] will react with=[tex]\frac{3}{1}\times 30.479=91.437moles[/tex] of [tex]H_2[/tex]
Mass of [tex]H_2[/tex] =[tex]moles\times {\text {Molar mass}}=91.437mol\times 2g/mol=182.87g[/tex]
Thus 182.87 grams of hydrogen are necessary to react completely with 853.42g of nitrogen.
BF3
What is The calculation and bond type
How many grams are in 21.4 mol Cl2 gas?
Cl2 = 70.9 g/mol
=
[tex]21.4 \: mol \times \frac{70.9 \: g}{1 \: mol} = 1517.26 \: g[/tex]
PLEASE HELP ANSWER ALL PARTS!!!
Answer:
The student should have multiplied the molar mass, which was not found, by the number of moles to get an answer of 925grams of Ca(OH)2.
Please find the correct step below
Explanation:
According to the question attached, the student was asked to find the mass in grams of a 12.5mol of Ca(OH)2.
Using the formula;
mole = mass ÷ molar mass
Molar mass of Ca(OH)2 = 40 + (16 + 1)2
= 40 + 17(2)
= 40 + 34
= 74g/mol
From the above formula;
Mass in grams = mole × molar mass
Mass (g) = 12.5 × 74
Mass (g) = 925grams of Ca(OH)2.
please help me!! (brainliest)
Answer:
ok
Explanation:
how many moles of water are required to produce 2.15 mol oxygen gas in this reaction
A gas at 127 celsius and 10.0 L expands to 20.0 L. What is the new
temperature in kelvin? (You must convert to Kelvin before calculating
this problem
Answer:
800.3 Kelvin
Explanation:
127°C = 400.15 Kelvin (because 127 + 273.15)
Charles Law:
[tex]\frac{V1}{T1} = \frac{V2}{T2}[/tex] Thus, [tex]\frac{10.0 L}{400.15 K} = \frac{20.0 L}{T2}[/tex]
Then, work out the math algebraically.
T2 = 20.0 / (10.0/400.15)
= 20.0 / 0.02499...
= 800.3 Kelvin
This is assuming the pressure remains constant.
ssignment Vhat challenges would have existed in the spread of Christianity. pe overcome. Remember social media and cell phones did not exis R < previous
Answer:
A lot of people rejected it outright. Christians were persecuted and killed for their beliefs, and there were no cars, etc for easy transportation. Most people had to walk everywhere since horses and the like were only for the rich and royal. Hope this helps, please give me brainliest :)
Explanation:
Answer: Your not the best a spelling...
Explanation:
an example of xenon (Xe)
Answer: i am not sure what you mean but here are some product of xenon stroboscopic lamps, photographic flash lamps, high-intensive arc-lamps for motion picture projection, some lamps used for deep-sea observation, bactericidal lamps, sunbed lamps and high-pressure arc all use this gas. In fact, you probably see xenon lamps on a regular basis and if you want compounds : Xe2F2, XeF4, XeO3, XeF6....
Explanation:
Why do you think males and children are more likely to die from DHMO
Answer:
Dihydrogen Monoxide (DHMO) is perhaps the single most prevalent of all chemicals that can be dangerous to human life. Despite this truth, most people are not unduly concerned about the dangers of Dihydrogen Monoxide. Governments, civic leaders, corporations, military organizations, and citizens in every walk of life seem to either be ignorant of or shrug off the truth about Dihydrogen Monoxide as not being applicable to them. In 1997, the Dihydrogen Monoxide Research Division was formed and went online spreading the truth about DIHYDROGEN MONOXIDE. As word has spread, so too has the public awareness of Dihydrogen Monoxide and its implications involving the Internet and accessibility of such information. To that end, the DMRD's web site at DHMO.org continues to provide the most comprehensive collection of Dihydrogen Monoxide information available anywhere.
Explanation:
DHMO has been the dihydrogen monoxide. It has been responsible for the death of males and children as it causes tissue damage.
The DHMO has been the hydric acid and is one of the major constituents of acid rain. Gas has been responsible for greenhouse gas. Ingestion may lead to tissue damage with symptoms of nausea, vomiting, and electrolyte imbalance.
The companies dumping waste in the rivers and lakes have been warned for the removal of DHMO as it has been harmful to the males and children, and results in death.
For more information about Dihydrogen Monoxide, refer to the link:
https://brainly.com/question/14898986
why and how do ions form?
Answer and Explanation:
Ions are electrically charged particles that are formed from the removing and addition of electrons. It can be a positively or negatively charged atom.
A 250 mL glass of orange juice cantains 22 grams of sugar. How much sugar is in a two liter (2,000 mL) bottle of orange juice?
Answer: 44000 g
Explanation:
For every 250mL of juice, there is 22g of sugar. So for 2000mL,
2000*22g = 44000g of sugar in the bottle of juice
H3PO4 + HCI
PCI5+H2O
Answer:
Balanced Chemical Equation:
H3PO4 + 5HCl → PCl5 + 4H2O
Determina la densidad de una barra dd hierro cuya masa ed de 160gr y su volumen es de 20,35cm³ ¿que volumen ocuparan 12g de hierro?
Answer:
15.26 cm³
Explanation:
La densidad de una sustancia se define como su masa por unidad de volumen:
densidad = masa/volumen
Tenemos los siguientes datos de la barra de hierro:
masa = 160 g
volumen = 20,35 cm³
Por lo tanto, la densidad de la barra de hierro es:
densidad = 160 g/20,35 cm³ = 0.786 g/cm³
El volumen de 12 gramos de hierro se calcula utilizando el dato de masa (12 g) y la densidad calculada:
densidad = masa/volumen ⇒ volumen = masa/densidad
= 12 g/(0.786 g/cm³)
= 15.26 cm³
4 OT 5
A 35g chunk of metal at 130C was dropped in a bucket containing 220g of water at 25C. The final temperature of the mixture
was 300. What is the specific heat capacity of the metal?
(Specific heat for water: 4184 J/g C) Formula (m)(c)(T) = (m) (c)(T)
Answer: The specific heat capacity of metal is [tex]1.31J/g^0C[/tex]
Explanation:
[tex]Q_{absorbed}=Q_{released}[/tex]
As we know that,
[tex]Q=m\times c\times \Delta T=m\times c\times (T_{final}-T_{initial})[/tex]
[tex]m_1\times c\times (T_{final}-T_1)=-[m_2\times c\times (T_{final}-T_2)][/tex]
where,
[tex]m_1[/tex] = mass of metal = 35 g
[tex]m_2[/tex] = mass of water = 220 g
[tex]T_{final}[/tex] = final temperature = [tex]30^0C[/tex]
[tex]T_1[/tex] = temperature of metal = [tex]130^oC[/tex]
[tex]T_2[/tex] = temperature of water = [tex]25^oC[/tex]
[tex]c_1[/tex] = specific heat of metal = ?
[tex]c_2[/tex] = specific heat of water = [tex]4.184J/g^0C[/tex]
Now put all the given values in equation (1), we get
[tex]m_1\times c_1\times (T_{final}-T_1)=-[m_2\times c_2\times (T_{final}-T_2)][/tex]
[tex]35\times c_1\times (30-130)^0C=-[220g\times 4.184\times (30-25)][/tex]
[tex]c_1=1.31J/g^0C[/tex]
Therefore, the specific heat capacity of metal is [tex]1.31J/g^0C[/tex]
