Brass and bronze are both of copper because copper is the component in brass and bronze.

Answer:

See below

Explanation:

How many atoms are in grossular/Ca2AL2(SiO4)3

_2___ calcium atoms amount

__2__ Aluminum atoms amount

__3__ silicon atoms amount

__12__ Oxygen atoms amount

See attached worksheet

Calculating probabilities in R

(a) The probability that exactly 20 fish survive can be calculated using the binomial probability formula in R. Let's denote this probability as P(X = 20), where X follows a binomial distribution with n = 29 (total number of fish) and p = 0.74 (probability of survival, calculated as 1 - 0.26). The calculation in R would be:

```R

dbinom(20, size = 29, prob = 0.74)

```

The resulting probability is the answer to part (a).

(b) The probability that at least 14 fish survive can be calculated by summing the probabilities of 14, 15, 16, and so on, up to 29. Denoting this probability as P(X ≥ 14), the calculation in R would be:

```R

sum(dbinom(14:29, size = 29, prob = 0.74))

```

The resulting probability is the answer to part (b).

(c) The probability that at most 23 fish survive can be calculated by summing the probabilities of 0, 1, 2, and so on, up to 23. Denoting this probability as P(X ≤ 23), the calculation in R would be:

```R

sum(dbinom(0:23, size = 29, prob = 0.74))

```

The resulting probability is the answer to part (c).

(d) To find the mean and variance of the number of fish that survive, we can use the formulas for the binomial distribution. The mean (μ) is calculated as n * p, and the variance (σ²) is calculated as n * p * (1 - p). Using the given values of n = 29 and p = 0.74, we can calculate the mean and variance in R:

```R

n <- 29

p <- 0.74

mean <- n * p

variance <- n * p * (1 - p)

```

The resulting mean and variance values are the answer to part (d).

What are the probabilities and statistics calculated in R for fish survival in polluted water?

(a) To calculate the probability that exactly 20 fish survive, we use the binomial probability formula in R, which considers the total number of fish (n = 29) and the probability of survival (p = 0.74). The resulting probability represents the likelihood of observing exactly 20 surviving fish.

(b) The probability that at least 14 fish survive is calculated by summing the probabilities of 14, 15, 16, and so on, up to the total number of fish (29). This cumulative probability indicates the likelihood of observing 14 or more surviving fish.

(c) The probability that at most 23 fish survive is calculated by summing the probabilities of 0, 1, 2, and so on, up to 23. This cumulative probability represents the likelihood of observing 23 or fewer surviving fish.

(d) The mean and variance of the number of fish that survive can be found using the formulas for the binomial distribution. The mean (μ) is equal to the product of the total number of fish (n) and the probability of survival (p).

The variance (σ²) is calculated as the product of n, p, and (1 - p). These values provide insights into the average and variability of fish survival in the given conditions.

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Answer: 29.16%

Explanation:

The total of 2 percentages need to equal 100% so we subtract the percent they gave us from 100.

Answer:

Neutrons

Explanation:

The mechanism for a set of reactions is given by

a) The differential equation is -d[A]/dt = k1[A]

b) Incomplete question

c) d[D]/dt = \(k_{2}\)[B][C]  '

d)[A] = [A]₀ * e^(-\(k_{1}\)t)

How to write differential equations for various reactions?

a) To write a differential equation for the disappearance of A, we need to consider the rate at which A is disappearing. Let's denote the rate of disappearance as -d[A]/dt. The negative sign indicates that the concentration of A is decreasing over time. The differential equation will be:

-d[A]/dt = \(k_{1}\)[A]

b) Unfortunately, the question is incomplete, and the differential equation for which species is not specified. Please provide more information to answer this part.

c) To write a differential equation for the appearance of D, we need to consider the rate at which D is being produced. Let's denote the rate of appearance as d[D]/dt. The differential equation will be:

d[D]/dt = \(k_{2}\)[B][C]

d) To write an equation that gives the concentration of A at any later time, we need to solve the differential equation we found in part a):

-d[A]/dt = \(k_{1}\)[A]

Integrating both sides with respect to time, we get:

∫-d[A]/[A] = \(k_{1}\)∫dt

-ln[A] = \(k_{1}\)t + C

Now, we can solve for the constant C using the initial condition that [A] = [A]₀ at t = 0:

-ln[A]₀ = C

So, our equation for [A] at any later time t is:

-ln[A] = \(k_{1}\)t - ln[A]₀

Solving for [A], we have:

[A] = [A]₀ * e^(-\(k_{1}\)t)

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Answer:

See explanation

Explanation:

Number of moles = given mass/molar mass

For Ca(OH)2

n= 31.82g/74g/mol= 0.43 moles

n = mass/ molar mass

Molar mass of K2SO3 = 158g/mol

mass= 3.2 × 158 = 505.6 g

1 formula unit = 6.02 × 10^23

1 mole = 6.02 × 10^23

x moles = 7.25x10^23

x = 7.25x10^23/6.02 × 10^23

x= 1.2 moles

1 mole of Cl2 occupies 22.4 L at STP

x moles of Cl2 occupies 46.6L

x = 46.6/22.4

x= 2.1 moles

Molarity or concentration, is the number of moles present in one liter of volume.

Molarity, M  = number of moles / Volume in liters

Unit of Molarity is mole/ liter second or the Molar represented by M.

We are given with a case with

Volume = 63.42 ml

Molarity = 3.5 M

and are asked to determine number of moles.

M  = number of moles / Volume in liters

number of moles = volume × Molarity

number of moles of HCl = (63.42)(3.5)/1000

number of moles of HCl = .22197 moles

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After equilibrium is established, then type of ion in solution in largest concentration, other than the k ion, is : (b) HPO₄²⁻.

In chemistry, equilibrium is a state of balance or stability achieved in chemical reaction when the rates of forward reaction and reverse reaction are equal.

The balanced chemical equation for the reaction between H₃PO₄ and KOH is:

H₃PO₄ + 3KOH → K₃PO₄ + 3H₂O

In this reaction, one mole of H₃PO₄ reacts with three moles of KOH to produce one mole of K₃PO₄ and three moles of water.

When equal volumes of 0.10 M H₃PO₄ and 0.20 M KOH are mixed, the concentration of OH⁻ ions will be in excess because KOH is strong base and H₃PO₄ is a weak acid. The OH⁻ ions will react with H⁺ ions of H₃PO₄ to form water, according to following reactions:

H₃PO₄ + OH⁻ → H₂PO₄⁻ + H₂O

H₂PO₄⁻ + OH⁻ →  HPO₄²⁻ +H₂O

The net effect of these reactions is that H₃PO₄ reacts with OH⁻ to produce HPO₄²⁻. Therefore, the type of ion in solution in largest concentration, other than the K+ ion, is  HPO₄²⁻.

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The volume of hydrogen gas produced at 315 K and 1.25 atm when 3.50 grams of zinc reacts with excess HCl is 1.16 L.

The balanced chemical equation for the reaction between zinc and hydrochloric acid is:

\(Zn(s) + 2 HCl(aq) → H2(g) + ZnCl2(aq)\)

We need to find the volume of hydrogen gas produced at 315 K and 1.25 atm when 3.50 grams of zinc reacts with excess HCl.

First, we need to determine the number of moles of zinc used in the reaction. The molar mass of zinc is 65.38 g/mol, so:

n(Zn) = 3.50 g / 65.38 g/mol = 0.0536 mol

Since 1 mole of zinc reacts with 1 mole of hydrogen gas, the number of moles of hydrogen gas produced is also 0.0536 mol.

Using the ideal gas law, PV = nRT, we can calculate the volume of hydrogen gas produced. We are given the temperature (315 K) and the pressure (1.25 atm), and the gas constant R is 0.0821 L·atm/(mol·K).

Substituting the values into the equation, we get:

V = (nRT) / P

V = (0.0536 mol) x (0.0821 L·atm/(mol·K)) x (315 K) / (1.25 atm)

V = 1.16 L

Therefore, the volume of hydrogen gas produced at 315 K and 1.25 atm when 3.50 grams of zinc reacts with excess HCl is 1.16 L.

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Answer:

Your Answer would be Option B

Answer:

B

Explanation:

The Answer is B-Transfer of heat through direct physical contact

Answer:

Explanation:

Are you a gril or boy

Explanation:

you use it yo determine the polarity of a covalent bond using numerical means find the difference between the electron gravity of atoms ; if the result is between 0.4 and 1.7 then generally the bond is polar covalent . pls follow and mark brainliantest

Calcium Hydroxide has three atoms 5 atoms in each molecule.

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Answer:

Amoeba since it can come together as a multicellular with other amoebas, but still act as one giant living cell.

Explanation: i read in a book that red-slime molds can do that. hope it wasn't too far too late recent.

Answer:

Salinity is a measure of the 'saltiness' of seawater, or more precisely the amount of dissolved matter within seawater.

The red colour is the limiting reactant.

Red-blue colour ball and two white balls attached together are reactants.

Red-blue colour ball and two white and one red colour ball attached to each other are products.

The reactant that is entirely used up in a reaction is called a limiting reagent.

A reactant is a substance that is present at the start of a chemical reaction. The substance(s) to the right of the arrow are called products.

A product is a substance that is present at the end of a chemical reaction.

Hence,

The red colour is the limiting reactant.

Red-blue colour ball and two white balls attached together are reactants.

Red-blue colour ball and two white and one red colour ball attached to each other are products.

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Answer:

The change from deep to shallow water waves occurs when the depth of the water , d , becomes less than one half of the wavelength of the wave, λ....A wave with a longer wavelength travels at higher speed . In contrast , shallow - water waves show no dispersion . Their speed is independent of their wavelength .

Hope this helps :)

In an ocean ecosystem,the difference between deep water and shallow water waves is that  waves in water deep enough so that the bottom has no effect on them are termed deep-water waves, whereas waves most affected by the bottom are called shallow-water waves.

Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.

Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.

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Answer:

the Coriolis effect

Explanation:

the Coriolis effect is a pattern of deflection responsible for this pattern of movement. since the earth rotates on it's axis, circulating air is deflected.

Answer: The Coriolis effect (make the other guy brainlyest he said it first)

Explanation:

2 Acetyl CoA molecules are generated after glycolysis.

The metabolic process known as glycolysis transforms glucose (C6H12O6) into pyruvate (CH3COCO2H). The high-energy molecules adenosine triphosphate (ATP) and reduced nicotinamide adenine dinucleotide are formed using the free energy released during this process (NADH).  A series of ten enzyme-catalyzed processes is known as glycolysis.

A list of the 10 processes involved in the glycolysis pathway. An oxygen-free metabolic pathway is glycolysis (In anaerobic conditions pyruvate is converted to lactic acid). The widespread prevalence of glycolysis in different species suggests that it is an old metabolic system.   In fact, the events that constitute glycolysis and its parallel pathway, the pentose phosphate pathway, take place in the oxygen-free environment of the Archean oceans, likewise in the absence of enzymes, and are activated by metal.

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Answer:

Newton's First Law is the law of inertia. An object with no net forces acting on it which is initially at rest will remain at rest. If it is moving, it will continue to move in a straight line with constant velocity. F is the net force acting on an object.

Explanation:

yay hope this helps.

it need force or something

The electronic configuration that is most likely to bond with Calcium with the ratio of 1:1 is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s².

To make a bond of Calcium with 1:1 ratio the other element should satisfy the same valency of that of Calcium. By doing so the element Calcium can bond with the ratio of 1:1.

Then in such a case, the last shell of the element should be in a position to gain 2 electrons which would be lost by Calcium.

This would create a bond of 1:1 ratio. A best example for this would be Calcium Oxide (CaO). Here, the valency of Calcium is 2+ and valency of oxygen is 2- which forms a compound of ratio 1:1.

Therefore, the electronic configuration that is most likely to bond with Calcium in the ratio of 1:1 is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s².  

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The balanced equation for the reaction of iron with water that results in the production of iron oxide and hydrogen gas is

3 Fe (s) + 4H₂O (g) → Fe₃O₄ (s) + 4H₂ (g)

Iron does not react directly with liquid water but react with water vapour. When the reaction happens, it results in the formation of a solid and a gas. The products of the reaction are Iron oxide and hydrogen. The equation of the reaction would be

Fe (s) + H₂O (g) → Fe₃O₄ (s) + H₂ (g)

Now, we need to balance the equation. On the right-hand side, we have 3 Fe, 4 O and 2 H. Similarly on the left-hand side there are 1 Fe, 1 O and 2 H.

To balance the equation, we add 3 to Fe, 4 to H₂0 and 4 to H₂.

As a result, the balanced chemical equation for the reaction would be

3 Fe (s) + 4H₂O (g) → Fe₃O₄ (s) + 4H₂ (g)

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A base is a substance that provides hydroxide ions (OH-) in water solution.Therefore, hydroxide ions are a characteristic feature of bases.

Bases are substances that have a pH greater than 7 and can neutralize acids. They react with acids to form salt and water. In water solution, bases dissociate and release hydroxide ions (OH-), which can accept protons (H+) from acids to form water. The more hydroxide ions a substance releases in water, the stronger the base is.

When a base is dissolved in water, it releases hydroxide ions (OH-), which can react with hydrogen ions (H+) from an acid to form water (H2O). This property is what gives bases their characteristic alkaline properties and allows them to neutralize acids.

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Density =mass/volume

=6/3

=2

Answer:

\(\boxed {\boxed {\sf PCl_3}}\)

Explanation:

We are given the percent composition: 22.5% phosphorus and 77.5% chlorine.

We can assume there are 100 grams of this compound. We choose 100 because we can simply use the percentages as the masses.

Next, convert these masses to moles, using the molar masses found on the Periodic Table.

Use the molar masses as ratios and multiply by the number of grams. \(22.5 \ g \ P * \frac {1 \ mol \ P }{30.974 \ g \ P}= \frac {22.5 \ mol \ P }{ 30.974} = 0.7264157035 \ mol \ P\)

\(77.5 \ g \ Cl * \frac {1 \ mol \ Cl }{35.45 \ g \ Cl}= \frac {77.5 \ mol \ Cl }{ 35.45} \ =2.186177715 \ mol \ Cl\)

Divide both of the moles by the smallest number of moles to find the mole ratio.

\(\frac {0.7264157035} {0.7264157035} = 1\)

\(\frac {2.186177715}{0.7264157035}=3.009540824 \approx 3\)

The mole ratio is about 1 P: 3 Cl, so the empirical formula is written as: PCl₃

Answer: 1.215 × 10^4  i think

Explanation:

The person's relative VO2 is 16.23 mL/kg/min. Absolute VO2 refers to the total volume of oxygen that the body consumes during exercise. It is typically measured in liters per minute (L/min).Relative VO2, on the other hand, takes into account the individual's body weight. It is typically expressed in milliliters of oxygen per kilogram of body weight per minute (mL/kg/min).

Here's how to calculate relative VO2:

Step 1: Convert the person's weight from pounds to kilograms.1 pound = 0.45 kilograms

Therefore, 125 pounds = 56.7 kilograms

Step 2: Divide absolute VO2 by body weight in kilograms and multiply by 1000 to convert to mL/kg/min

.Relative VO2 = (absolute VO2 ÷ body weight in kg) × 1000Relative VO2 = (0.92 L/min ÷ 56.7 kg) × 1000Relative VO2 = 16.23 mL/kg/min

Therefore, the person's relative VO2 is 16.23 mL/kg/min.

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As the temperature of a given sample of an ideal gas decreases at constant pressure, the volume of the gas: increases in accordance with Charles's law.

Charles law states that when the pressure of an ideal gas is kept constant, the volume of the gas is indirectly proportional to the absolute temperature of the gas.

Mathematically, Charles law is given by the formula;

\(\frac{V}{T} =k\)

Where;

According to Charles's law, when the volume of an ideal gas is decreased at a constant pressure, the temperature of the gas is increased and when the volume of a gas is increased at a constant pressure, the temperature of the gas is decreased due of the inverse relationship existing between them.

In conclusion, the temperature of a gas decreases the volume occupied by a gas provided pressure is kept constant in accordance with Charles's law.

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Chromatography is a method of separating out materials from a mixture.

Aim:  To separate the dye present in ink by the process of evaporation.

Materials required:  Beaker, watch glass, water, ink and stove.

Procedure: Take a beaker and fill it to half its volume with water.  Keep 3, glass on the mouth of a beaker.  Put few drops of ink on the watch glass. Heat the beaker and observe the watch glass.  

Observations:   We observe some fumes coming from the watch glass.   Continue heating till you do not observe any further change on the watch glass.   A small residue will be remained on the watch glass.  

Inference:   We know that ink is a mixture of a dye in water.   The residue remained on the watch glass is the dye present in the ink.

Chromatography is a method of separating out materials from a mixture. Ink is a mixture of several dyes and therefore we can separate those colors from one another using chromatography.

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Since 12C’s molar mass is 12 grams, 48 grams of 12C atoms would be equal to 4 moles.

Carbon, is a chemical element having symbol C and its atomic number 6. Carbon atoms have six protons and usually have six neutrons in their nucleus, although isotopes of carbon with different numbers of neutrons exist.

Since the molar mass of 12C is 12 grams/mole, we can use the following formula to calculate the number of moles;

moles = mass / molar mass

Substituting the given values, we get;

moles = 48 g / 12 g/mol

moles = 4 mol

Therefore, 48 grams of 12C atoms is equal to 4 moles of 12C.

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