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Answer:

24

Explanation:

In an uncharged atom, the number of protons is always equal to the number of electrons. For example, carbon atoms include six protons and six electrons, so carbon's atomic number is 6.

Similarly, since an atom of chromium contains 24 protons, it also contains the same amount of electrons, which is 24.

Answer:

24 is your answer

Explanation:

Answer:

2.94 grams Nickle

Explanation:

All they are asking is to convert moles to grams

To do this, find the atomic mass of nickel using the periodic table: 58.693 g

0.05 mol * 58.693 g/1 mol = 2.93465 grams

Answer:

mixture i think

Explanation:

Answer:

mixture

Explanation:

Answer:

for brass

mass m1 =150g

t1=90°c

specific heat of brass s1=0.380 J/gC.

for water

t2=20°c

mass m2=230g

Specific heat of water s2= 4.18 J/gC,

Explanation:

we have

Q1=Q2

m1s1{t-t1)=m2s2(t2-t)

150×0.380(t-90)=230×4.18(20-t)

57t-5130=961.4×20-961.4t

57t +961.4t=19228+5130

1018.4t=24358

t=24358/1018.4=23.91=24°c is final temperature

Answer:

the sewcond one bacteria are living organisms, but viruses are not

Explanation:

Answer:

Bacteria are living organisms, but viruses are not

Explanation:

Answer:

8740 joules are required to convert 20 grams of ice to liquid water.

Explanation:

The amount of heat required ([tex]Q[/tex]), measured in joules, to convert ice at -50.0 ºC to liquid water at 0.0 ºC is the sum of sensible heat associated with ice and latent heat of fussion. That is:

[tex]Q = m\cdot [c\cdot (T_{f}-T_{o})+L_{f}][/tex] (1)

Where:

[tex]m[/tex] - Mass, measured in grams.

[tex]c[/tex] - Specific heat of ice, measured in joules per gram-degree Celsius.

[tex]T_{o}[/tex], [tex]T_{f}[/tex] - Temperature, measured in degrees Celsius.

[tex]L_{f}[/tex] - Latent heat of fussion, measured in joules per gram.

If we know that [tex]m = 20\,g[/tex], [tex]c = 2.06\,\frac{J}{g\cdot ^{\circ}C}[/tex], [tex]T_{f} = 0\,^{\circ}C[/tex], [tex]T_{o} = -50\,^{\circ}C[/tex] and [tex]L_{f} = 334\,\frac{J}{g }[/tex], then the amount of heat is:

[tex]Q = (20\,g)\cdot \left\{\left(2.06\,\frac{J}{g\cdot ^{\circ}C} \right)\cdot [0\,^{\circ}C-(-50\,^{\circ}C)]+334\,\frac{J}{g} \right\}[/tex]

[tex]Q = 8740\,J[/tex]

8740 joules are required to convert 20 grams of ice to liquid water.

Answer:

Umm who's Kyle?

Explanation:

Answer:

his skills aren’t as valuable to the team as he thought

Explanation:

Answer: both

Explanation:

Answer:

has 6 valence electrons as its in group 6

the atom will gain electrons

the charge will be 2- as it will gain 2 electrons to be a full configuration

Answer:

sodium chloride—is NaCl.

Explanation:

Table salt is an ionic compound, which breaks into its component ions or dissociates in water. These ions are Na+ and Cl-. The sodium and chlorine atoms are present in equal amounts (1:1 ratio), arranged to form a cubic crystal lattice.

Answer:

Chemical equation for nacl dissolving in water

NaCl(s) H2O⇌ Na+(aq)+Cl−(aq) .

Explanation:

Answer:

molarity is moles/L so take the 3.48 and divide it by 4.1L

and get 0.848... and need to keep your answer to 2 digits as that is th emost precise measurement you have (the 4.1L)

so 0.85mol/L

Explanation:

The net ionic equation is applied mainly in neutralization reactions, double displacement reactions and redox reactions. Therefore,  the net ionic equation is Ag⁺(aq)+CO[tex]_3[/tex]²⁻(aq)  [tex]\rightarrow[/tex]Ag[tex]_2[/tex]CO[tex]_3[/tex](s).

The net ionic equation represents a chemical equation of a reaction that give an idea of species that are really participating in the reaction. We can write net ionic equations for those electrolyte which are strong in water.

The balanced net ionic equation is

2AgF(aq)+Na[tex]_2[/tex]CO[tex]_3[/tex](aq)[tex]\rightarrow[/tex]Ag[tex]_2[/tex]CO[tex]_3[/tex](s)+2NaF(aq)

Ag⁺(aq) +F⁻(aq) +Na⁺(aq) +CO[tex]_3[/tex]²⁻(aq) [tex]\rightarrow[/tex]Ag[tex]_2[/tex]CO[tex]_3[/tex](s)+Na⁺(aq) +F⁻(aq)

Ag⁺(aq)+CO[tex]_3[/tex]²⁻(aq)  [tex]\rightarrow[/tex]Ag[tex]_2[/tex]CO[tex]_3[/tex](s)

The net ionic equation cancels out ions that appear on both sides of the reaction arrow because they essentially don't participate in the reaction of interest.

Therefore,  the net ionic equation is Ag⁺(aq)+CO[tex]_3[/tex]²⁻(aq)  [tex]\rightarrow[/tex]Ag[tex]_2[/tex]CO[tex]_3[/tex](s).

To learn more about net ionic equation, here:

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Answer:

a. 47 electrons

b. 6 electrons

c. 11 electrons

d. 10 electrons

e. 53 electrons

Explanation: If you are talking about neutral atoms (where as the number of protons in an atom is equal to the number of electrons in the atom), or are just being introduced to atoms then the number of electrons will be equal to the number of protons the atom has. Or vice versa, the number of protons will be equal to the number of protons in an atom. For example, in a neutral atom, with 51 protons, will have 51 electrons. Or an atom with 5 electrons will have 5 protons.

Answer:

The statements which are correct are;

c) (i), (ii) and (iv)

Explanation:

The chemical equation is presented as follows;

2Fe(s) + 3H₂O(g) → 3Fe₂O₃(s) + 3H₂(g)

Therefore, we have;

i) The iron gains oxygen atoms and therefore gets oxidized

The iron loses 3 electrons each to become oxidized to Fe³⁺ in Fe₂O₃

ii) The water loses oxygen and therefore it is getting reduced

iv) The water donates oxygen and therefore it is acting as the oxidizing agent

The correct options are (i), (ii) and (iv).

Fusion powers the sun. This creates nuclear energy, which then goes to earth in the form of radiation. The plants get sunlight and photosynthesise (the process of getting glucose by sunlight). The answer should be C.

Answer:

2- Helium(He)

20-Calcium(Ca)

Answer:

Do you mean under 2 & 18 or under 4 & 20?

Explanation:

2 & 20 are in opposite sections of the periodic table. If you mean 2& 18 the element is Krypton or if you mean 4 & 20 the element is Strontium

Answer:

a) 377 k

b) 270 k

Explanation:

a) 104 + 273 = 377 k

b) -3 + 273 = 270 k

Answer:

It is difficult, if not impossible, to heat a solid above its melting point because the heat that ... in a solid are packed in a regular structure that is characteristic of that particular substance.

Answer:

Rate = k [ClCO][Cl2]

Explanation:

Cl2⇌2Cl(fast,equilibrium)

Cl+CO⇌ClCO(fast,equilibrium)

ClCO+Cl2→Cl2CO+Cl(slow)

The rate determining step from which the rate aw is obtained from is the slowest step of a chemical reaction. In this reaction, the slowest step is;

ClCO+Cl2 → Cl2CO+Cl (slow)

The rate equation for the step is;

Rate = k [ClCO][Cl2]

ClCO is an intermediate and would eventually get cancelled out from the overall rate equation.

Phosgene is the chemical used in the formation of pesticides and ios poisonous. The rate law is given as, k [chloroformylradical][chlorine gas].

The rate law is the relation of the concentration of the reactants and the products with that the speed of the reaction.

The reaction for the formation of phosgene is given as,

[tex]\rm Cl_{2} \rightleftharpoons 2Cl\; (fast,equilibrium)\\\\\rm Cl+CO \rightleftharpoons ClCO\; (fast,equilibrium)\\\\\\rm ClCO+Cl_{2}\rightarrow Cl_{2} CO+Cl\; (slow)[/tex]

The rate law is determined by the rate-determining step which is the slowest step of the reaction.

[tex]\rm ClCO+Cl_{2}\rightarrow Cl_{2} CO+Cl\; (slow)[/tex]

The rate of the equation is given as,

[tex]\rm Rate = k [ClCO][Cl_{2}][/tex]

As COCl is an intermediate the third step will be the rate-determining step.

Therefore, the slow step determines the rate of the reaction.

Learn more about rate law here:

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Answer:

Metal is a better conductor than plastic so its going to absorb any cooler temperatures while the plastic stays the same.

Explanation:

Answer:

An allele is dominant, it will express in a person the characteristic to which it is related. When an allele is recessive, it is less likely to express the function to which it is related. Recessive traits only occur when in a person both alleles are recessive.

Answer: The empirical formula for the ethyl ethanoate molecule is C2H4O.

Explanation:

Ethyl ethanoate is an ester which is formed together with water when ethanol reacts reversibly with acids. This can be illustrated below:

CH3COOH +. C2H5OH <----> CH3COOC2H5 +

H2O

Ethyl ethanoate can be used as an important solvent for varnishes and in the manufacture of artificial leather.

Different formulas can be used to illustrate a chemical compound.

--> Empirical formula of a compound is used to illustrate the simplest whole-number ratio of atoms in a compound.

--> Structural formula of the compound gives an illustration of how the atoms of the compound are bonded to each other.

--> Molecular formula shows the number of each type of atom in a molecule.

The formula given, the molecular formula of the compound is C4H8O2:

C4 H8 O2

4 : 8 : 2

Using 2 to divide through to get the simplest ratio gives rise to C2H4O as the empirical formula.

Answer:

One mole of oxygen gas, which has the formula O2, has a mass of 32 g and contains 6.02 X 1023 molecules of oxygen but 12.04 X 1023 (2 X 6.02 X 1023) atoms, because each molecule of oxygen contains two oxygen atoms.

Answer:

Cu^2+ (aq) + S^2- (aq) --> CuS (s)

Explanation:

Break up all the soluble compounds into their constituent ions to get the complete ionic equation, and cross off the ones that appear the same on both sides:

Cu (aq) + 2Cl(aq) + 2Na (aq) + S (aq) --> CuS (s) + 2Na (aq) + 2Cl (aq)

2Cl and 2Na appear on both sides of the arrow, so cross those out to get the net ionic equation.

Answer:

A. True

Explanation:

Answer:

A

Explanation:

Answer:

100 n im just guess

Explanation:

if it helps.

have a good day

hope you stay safe