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dangina [55]
3 years ago
5

PLEASE HELPP

Chemistry
2 answers:
RoseWind [281]3 years ago
7 0

Answer:

a heat lamp

Explanation:

Fofino [41]3 years ago
7 0

Answer:

The one under the heat lamp is most effective

Explanation:

The heat is making the water warm and will soon evaporate

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Can you please tell me what is a rock?
ivann1987 [24]

Answer:

its on goggle!

Explanation:

6 0
3 years ago
Calculate the nuclear binding energy in mega-electronvolts (MeV) per nucleon for 136 Ba . 136 Ba has a nuclear mass of 135.905 a
sergey [27]

Answer:

8.194 Mev per nucleon

Explanation:

Mass of Barium = 135.905 amu

number of proton = 56, number of neutron = 80

Md = (Mp + Mn) - Mb Mp is the mass of proton, Mn is the mass of neutron, Mb is the mass of barium and Md is the mass defect

Mn = 1.00867 amu Mp = 1.00728 amu

Md = ( 56 ( 1.00728) + 80 ( 1.00867) = 137.1013 - 135.905 =1.1963 amu

Md = 1.1963 × 1 ÷ ( 6.02214 × 10 ²⁶ amu ) = 1.9865 × 10 ⁻²⁷ kg

Energy = mc² = 1.9865 × 10 ⁻²⁷ kg × (2.99792 × 10 ⁸ m/s)²

E= 1.78537 × 10⁻¹⁰ J

to convert to Mev

1.78537 × 10⁻¹⁰ × 6241457006000 = 1114.33 Mev

binding energy per nucleon = 1114.33 / 136 =8.194 Mev per nucleon

5 0
3 years ago
A. Which date shows a waning crescent?
postnew [5]

Answer:

Warning means that it is getting smaller while crescent refers to the crurved shape simular to a banana or a boat. The warning crescent moon rises after midnight and is still up and visible in the morning and day sky before itsets in the afternoon.

Explanation:

6 0
4 years ago
Match each of the unknown ions to its appropriate description.
mafiozo [28]

Answer:

C) V3− A) A nonmetal that gained one electron

A ) X− B) A metal that lost one electron

B) Y+ C) A nonmetal that gained three electrons

D ) Z3+ D) A metal that lost three electrons

Explanation:

6 0
3 years ago
Read 2 more answers
Please check my answers for the sigfig count.
ss7ja [257]
You have a. 3, b. 2, e. 6, f. 3, i. 1
5 0
3 years ago
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