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3 years ago

PLEASE HELP: 60 POINTS

Chemistry

2 answers:

astra-53 [7]3 years ago

7 0

Answer:

all of they above

Explanation:

Elza [17]3 years ago

6 0

Answer:

The answer is adding a proton to the nucleus.

Explanation:

The answer is adding proton to the nucleus.

Beta decay is radioactive decay in which a beta ray and a neutrino are emitted from an atomic nucleus.

There are two types of beta decay: beta minus and beta plus.

In beta plus decay, a proton is converted to a neutron, positron and an electron neutrino, so mass number does not change.

In beta minus decay (atomic number Z is increased by one) neutron is converted to a proton and an electron and an electron antineutrino.

For example, nuclear reaction:

²⁶Na → ²⁶Mg + e⁻(electron) + ve(electron antineutrino

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What is the gram molecular mass of a compound if 5 moles of the compound has a mass of 100 grams?

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find the volume of an item using a scale and waterA crown made of alloy of gold and silver has a volume of 60cm3and mass of 1050

KiRa [710]

Answer:

The mass of gold in crown is 960.61 g.And the volume of gold is $49.77 cm^3$ .

Explanation:

Density is defined as mass of the substance present in unit volume of the substance.

Mass of gold in an alloy of crown= m

Mass of silver in an alloy of crown = M

Volume gold in an alloy of crown= v

Volume of silver in an alloy of crown = V

Density of gold = $19.3 g/cm^3$

Density of silver = $10.5 g/cm^3$

Volume of the crown = $60 cm^3$

$60 cm^3=v+V$

$60 cm^3=\frac{m}{19.3 g/cm^3}+\frac{M}{10.5 g/cm^3}$ ..(1)

Mass of eh crown = 1050 g

$1050g =m+M$ ..(2)

Solving equation (1) and (2):

m = 960.61 g

M = 89.39 g

Volume of the gold = v = $\frac{960.61 g}{19.3 g/cm^3}=49.77 cm^3$

Volume of silver = V = $60 cm^3-v=60 cm63-49.77 cm63=10.23 cm^3$

The mass of gold in crown is 960.61 g.And the volume of gold is $49.77 cm^3$ .

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3 years ago

Match the characteristics of each of the substance to their category

hjlf

Answer:

Metal: C, F, G,

Nonmetal: B, E,

Metalloid: A, D, H

Explanation:

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3 years ago