how many of the following salts are expected to be insoluble in water sodium sulfate barium nitrate ammonium sulfate potassium phosphate

Explanation:

the force of the lone pairs from the bottom would cancel out the force of the lone pairs from the top. Thus, the molecule will be linear.

Answer:

D

Explanation:

The ratio of C6H12O6 (which will be referred to as "the carb") to oxygen is 1 to 6, so if we find an answer which has the same ratio, it should be chosen. A is 1:3
B is even worse with a ratio of the carb to oxygen of 1:2
C is the same as B, 1:2
D has a ratio of the carb to oxygen of 1:6, which is what we are looking for.

Answer:

35.5 is the answer

Explanation:

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The element that has chemical properties most similar to sodium is d. rubidium.

What is rubidium?

Rubidium is in the same group (group 1) as sodium in the periodic table and has similar chemical properties, such as reactivity with water and the tendency to form ionic compounds with halogens. Magnesium, oxygen, and phosphorus are not in the same group as sodium and have different chemical properties.

What is periodic table?

The periodic table is a tabular display of all known chemical elements, arranged according to their atomic structure and properties. It is arranged in rows and columns, with elements placed in order of increasing atomic number, which is the number of protons in an atom's nucleus. The periodic table is a powerful tool for predicting the chemical behavior of elements and for understanding the relationships between different elements. It is used extensively in chemistry, physics, and other sciences to help understand the properties and behavior of different elements, and to guide research and development in many different fields.

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Answer:

We need more? What else is in the question? This is unanswerable.

Explanation:

Answer:

Can you arrange it? I don't understand

If you put 1.50 moles of N2 and 4.00 moles of O2 gas in a 45.0 L container at a temperature of 45°C, the total pressure of the system is 323.1 atm.

The ideal gas law, also known as the general gas equation, is the state equation for a hypothetical ideal gas. Although it has several limitations, it is a good approximation of the behavior of many gases under many conditions.

Given;

N = 5.50 moles

V = 45.0 L

R = gas constant 8.314

T = 318 kelvin

P = ?

By an Ideal gas equation,

PV = nRT

By substituting this values in ideal gas equation, and we get as follows:

P = nRT / V

= 5.50 × 8.314 × 318 / 45.0

= 323.1 atm

Thus, the total pressure of the system is 323.1 atm.

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Answer:

\(Q=330J\)

Explanation:

Hello!

In this case, since the energy involved during a heating process is calculated as shown below:

\(Q=mC(T_2-T_1)\)

Whereas we consider the mass, heat capacity and temperature; we are able to plug in the given data to obtain:

\(Q = 20g*1.1\frac{J}{g\°C}(40\°C-25\°C)\\\\Q = 330J\)

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The atomic mass of element A, given that the first isotope has abundance of 18.18% and a mass of 147.99, is 131.43 amu

From the question given above, the following data were obtained:

The atomic mass of the element A can be obtain as illustrated below:

Atomic mass = [(Mass of 1st × 1st%) / 100] + [(Mass of 2nd × 2nd%) / 100]

Inputting the given parameters, we have:

Atomic mass = [(147.99 × 18.18) / 100] + [(127.76 × 81.82) / 100]

Atomic mass = 26.90 + 104.53

Atomic mass = 131.43 amu

Thus, the atomic mass of element A obtained from the above calaculation is 131.43 amu

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Answer:

H20 is a compound

Explanation:

(H2O) is a compound consisting of two hydrogen atoms bonded to an oxygen atom.

Answer: 13.5 minutes to run 3.2 km.

Explanation: To solve this problem, you need to convert the distance from kilometers to miles and the speed from miles per hour to kilometers per hour. 3.2 km is approximately 1.988 miles and 5.5 mph is approximately 8.851 kph. To find the time it takes to run 1.988 miles at 8.851 kph, you can use the formula time = distance ÷ speed. Plugging in the values, you get time = 1.988 miles ÷ 8.851 kph, which simplifies to approximately 0.225 hours or 13.5 minutes.

Therefore, it will take the student approximately 13.5 minutes to run 3.2 km.

Answer:

lungs

Explanation:

The decay of Cobalt-60 follows an exponential decay law, which is given by:

N(t) = N₀ * \((1/2)^{(t/T)\)

where N(t) is the amount of the radioactive substance at time t, N₀ is the initial amount of the substance, T is the half-life of the substance, and (1/2)^(t/T) is the fraction of the substance that remains after time t.

In this problem, we are given that only 0.8% of the original sample remains, which means that the fraction of the substance that has decayed is:

1 - 0.008 = 0.992

Substituting this value into the equation above, we get:

0.992 = (1/2)^(t/5.26)

Taking the natural logarithm of both sides, we get:

ln(0.992) = (t/5.26) * ln(1/2)

Solving for t, we have:

t = (ln(0.992) / ln(1/2)) * 5.26

Using a calculator, we get:

t ≈ 94.62 years

Therefore, it takes about 94.62 years for a sample of Cobalt-60 to decay until the point that only 0.8% of the original sample remains.

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Answer:

Cementation

Explanation:

Sedimentary rocks are types of rock that are formed by the accumulation or deposition of mineral or organic particles at the Earth's surface, followed by cementation. Sedimentation is the collective name for processes that cause these particles to settle in place :)

Answer:

Coal

Explanation:

Coal is formed from plants trapped in dust and dirt for a long time, so coal would fit plant material, and it also takes a long time to make coal, that's why it will run out at some point

Ionic bonds are bonds that occur due to the handover of electrons to form positive ions and negative ions whose electron configuration is the same as that of the noble gasses.

Chemical bonds are the forces that hold atoms in elements and compounds together. Chemical bonds can occur with several types of bonds.

Based on the electron configuration that occurs in bond formation, chemical bonds are divided into 4 types:

1. Ionic or electrovalent bonds

This bond occurs because of the electrostatic attraction between positive ions and negative ions in a chemical compound

2. Covalent bonds

Covalent bonds occur when the sharing of electron pairs from each of the bonding atoms.

3. Coordinate covalent bond

Coordinate covalent bond is a bond that uses a shared pair of electrons, but the electrons only come from one of the atoms.

4. Metallic bond

This bond is formed due to the attractive force of the metal atomic nucleus with a sea of electrons.

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Answer:

Direct-air capture

Explanation:

To understand the technology I'm about to explain, I'll model it to something familiar. As you know, the process of  photosynthesis is where trees and plants use sunlight, water, and carbon dioxide to create energy for themselves, and release oxygen as a byproduct. Direct- air capture is exactly like this. Its pulls in air and then through a range of similiar chemical reactions, it extracts the carbon dioxide from it while returning the rest of the air to the surrounding environment. Except, the Direct-air capture does this at a much faster rate than nature does. The direct-air capture uses a ginormous fan that pulls air in which then passes over plastic surfaces that have potassium hydroxide solutions covered over them. The potassium hydroxide solution chemically binds with the carbon dioxide molecules, removing them from the air and trapping them in the liquid solution as a carbonate salt. The carbon dioxide is then contained where it is compressed and purified and then stored for later use.

Answer:

It depends on what kind of pasta it is

Answer:

The group number in the periodic table represents number of valence electrons of the elements in a certain group.

Explanation:

There are s, p, d, and f blocks, which you can see in periodic table

The s-block and p-block together are usually considered main-group elements, the d-block corresponds to the transition metals, and the f-block encompasses nearly all of the lanthanides (like lanthanum) and the actinides (like actinium)

There are three main principles, which may useful for you:

Hope this helps!

Answer:

Grade A is the best percentage that is developing, proficient, exceeding, and emerging

Answer:

3.4 x 10²⁵ atoms Ag

Explanation:

To find the amount of silver (Ag) atoms, you need to use Avogadro's number to convert between moles and atoms. Make sure to arrange the ratio in a way that allows for the cancellation of moles. The final answer should have 2 sig figs to correlate with the number of sig figs in the given value (56 = 2 sig figs).

Avogadro's number:

6.022 x 10²³ atoms = 1 mole

56 moles Ag          6.022 x 10²³ atoms
--------------------  x  ----------------------------------  =  3.4 x 10²⁵ atoms Ag
                                         1 mole

Answer:

73.05g

Explanation:

1.25 mol NaCl * \(\frac{58.44g}{1 mol NaCl}\) = 73.05g

58.44g = molar mass of NaCl

Answer:

Explanation:

4

Answer:

Explanation:

That's correct. Once Aluminum becomes an ion, it is very hard to force it to take back its electrons. Only a few elements can do it. Iron is not one of them.

The answer is 290.66 mL

Explanation:

The density of any substance including styrofoam is determined by two main factors: mass (atoms in the substance) and volume (space occupied). Moreover, the volume or mass of the substance can be calculated by using the density as these variables are related. Below I show the process:

density = mass / volume

mass = density x volume

volume = mass / density

volume = 21.80 g / 0.075 g/mL

volume = 290.66 mL

Answer:

yes

Explanation:

Based on the given reactions, the compounds are as follows:

A: The specific product formed from the reaction between prop-1-yne and either 2HBr or H2O2.

B: The product formed when compound A reacts with 2H2O.

C: The product formed when compound B reacts with K2CO3(aq).

D: The product formed from the heat-induced reaction of compound C.

E: The product formed when compound D reacts with HBr.

Based on the given reactions, let's analyze the compounds involved:

Reaction 1: prop-1-yne + 2HBr/H2O2 = A

The reactant prop-1-yne reacts with either 2HBr or H2O2 to form compound A. The specific product formed will depend on the reaction conditions.

Reaction 2: A + 2H2O = B

Compound A reacts with 2H2O (water) to form compound B.

Reaction 3: B + K2CO3(aq) = C

Compound B reacts with K2CO3(aq) (potassium carbonate dissolved in water) to form compound C.

Reaction 4: C + heat = D

Compound C undergoes a heat-induced reaction to form compound D.

Reaction 5: D + HBr = E

Compound D reacts with HBr (hydrobromic acid) to form compound E.

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The Lewis structure of the hydrogen molecule have been shown in the image attached.

The Lewis structure, sometimes referred to as the Lewis dot structure or electron dot structure, is a figurative picture of a molecule or ion that shows how the atoms are arranged, how they are bound together, and how the valence electrons are distributed.

We can see that there are two electrons that have been shared by the hydrogen atoms and it is positioned in between the atoms as shown

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Answer:

telescopes and microscopes both use lenses

Answer:

A To B

Explanation:

due to distance n time