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3 years ago

Please I need it asap

Chemistry

2 answers:

DaniilM [7]3 years ago

5 0

Answer:

i think is A.

Explanation:

svp [43]3 years ago

4 0

Answer:

I not understand your questions

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Which choice below would match homozygous recessive?

LUCKY_DIMON [66]

The answer is B

Homozygous mean the same and you know that the two alleles will be the same (either BB or bb) and receive is usually the lower case set of alleles

8 0

2 years ago

Read 2 more answers

100cm³of a solution of potassium hydroxide contains 0.56g of the dissolved solute. What is the molar concentration of this solut

s2008m [1.1K]

Answer:

[KOH] = 0.10M in KOH

Explanation:

Molar Concentration [M] = moles solute/volume solution in liters

moles KOH = 0.56g/56g/mole = 0.01mole

Volume of solution = 100cm³ = 100ml = 0.10 liter

[KOH] = 0.01 mole KOH / 0.10 liter solution = 0.10M in KOH

5 0

3 years ago

Help me with this attachment please

Anna007 [38]

Answer:

See explanation

Explanation:

Let us recall that the basic rule in writing balanced chemical reaction equations is that the number of atoms of each element on the right hand side of the reaction equation is the same of the number of atoms of the same element on the left hand side of the reaction equation.

The reaction of red hot iron and steam is written as follows;

3Fe + 4H2O → Fe3O4 + 4H2.

The decomposition reaction of ammonium dichromate is written as;

(NH4)2Cr2O7 → N2 + Cr2O3 + 4H2O

Reaction of aluminium, sodium hydroxide and water is as follows,

2Al + 2NaOH + 2H2O ----> 2NaAlO2 + 3H2

Reaction of potassium bicarbonate with sulphuric acid;

2KHCO3 + H2SO4 -------> K2SO4 + 2H2O + 2CO2

Reaction of zinc and sodium hydroxide is as follows;

Zn + 2NaOH→Na2ZnO2 + H2

5 0

3 years ago

Using the Br?nsted-Lowry concept of acids and bases, identify the Br?nsted-Lowry acid and base in each of the following reaction

antiseptic1488 [7]

Answer:

$H_2PO_3^-$ is Bronsted Lowry base.

$H_2O$ is Bronsted Lowry acid.

Explanation:

According to the Bronsted Lowry conjugate acid-base theory:

An acid is defined as a substance which donates protons and form conjugate base
A base is defined as a substance which accepts protons and forms conjugate acid.

$H_2PO_3^-(aq)+H2O(l)\rightarrow H_3PO_3(aq)+OH^-(aq)$

$H_2PO_3^-$ is Bronsted Lowry base.It accepts protons and forms conjugate acid $H_3PO_3$

$H_2O$ is Bronsted Lowry acid.It donates protons and forms conjugate base $OH^-$

$(CH_3)_2NH(g)+BF_3(g)\rightarrow (CH_3)_2NHBF_3(s)$

There in no exchange of proton in an above reaction.Neither of the reactants and products are Bronsted Lowry acid or Bronsted Lowry base

5 0

3 years ago

Gold has always been a highly prized metal, widely used from the beginning of history as a store of value. It doesn\'t rust like

Alecsey [184]

Answer:

1Au(s) + 3HNO₃(aq) + 4HCl(aq) → 1HAuCl₄(aq) + 3NO₂(g) + 3H₂O(l)

The function of HCl is oxidize the gold.

Explanation:

It is possible to balance the reaction seeing each compound as a variable and take an equation for each atom, thus:

Au(s) + HNO₃(aq) + HCl(aq) → HAuCl₄(aq) + NO₂(g) + H₂O(l)

a + b + c = d + e + f

Au: a = d (1)

H: b + c = d + 2f (2)

N: b = e (3)

O: 3b = 2e + f (4)

Cl = c = 4d (5)

Assuming a = 1:

1 = d (1)

c = 4 (5)

b + 3 = 2f (2)

3b = 2e + f (4)

As b = e:

b = f (4)

f = 3; b = 3; e = 3

Thus, balanced reaction is:

1Au(s) + 3HNO₃(aq) + 4HCl(aq) → 1HAuCl₄(aq) + 3NO₂(g) + 3H₂O(l)

The function of HCl is oxidize the gold that before reaction is Au⁰ and afte ris Au⁺³

I hope it helps!

4 0

3 years ago