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ololo11 [35]
3 years ago
7

How many kilojoules of heat are required to heat 2550 grams of water from 17.5°C to 100.0°C?

Chemistry
1 answer:
Brut [27]3 years ago
3 0

Answer:

800.209

Explanation:

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Pressure of an ideal gas ___________________, when number of particles ( moles ) of gas decreases.
atroni [7]
The answer to your question is B.
3 0
3 years ago
How are photons emitted by atoms?
Paul [167]

Explanation:

<em>When the electron changes levels, it decreases energy and the atom emits photons. The photon is emitted with the electron moving from a higher energy level to a lower energy level. The energy of the photon is the exact energy that is lost by the electron moving to its lower energy level.</em>

6 0
3 years ago
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A sample of calcium oxide (CaO) has a mass of 2.80 g. The molar mass of CaO is 56.08 g/mol. How many moles of CaO does this samp
Molodets [167]

Answer is "0.05 mol".

<em>Explanation;</em>

We can do calculation by using a simple formula as

n = m/M

Where, n is the number of moles of the substance (mol), m is the mass of the substance (g) and M is the molar mass of the substance (g/mol).

Here,

n = ?

m = 2.80 g

M = 56.08 g/mol

By substitution,

n = 2.80 g /56.08 g/mol

n = 0.0499 mol ≈ 0.05 mol

4 0
3 years ago
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A military jet cruising at an altitude of 12.0km and speed of 1300./kmh burns fuel at the rate of 46.2/Lmin. How would you calcu
ira [324]

Answer:

2,452.12 L of fuel the jet consumes on a 1150 km mission.

Explanation:

Speed of the jet = 1300 km/h

1 hour = 60 minutes

1300 km/h=\frac{1300 km}{60 min}=21.667 km/min

Rate at which jet consumes fuel = 46.2 L/min

Distance covered by jet by consuming 1 liter fuel or mileage = R

R = \frac{21.667 km/min}{46.2 L/min}=0.4690 km/L

The amount of fuel the jet consumes on a 1150 km mission will = V

Amount of fuel = \frac{Distance}{Mileage}

V=\frac{1150 km}{0.4690 km/L}=2,452.12 L

2,452.12 L of fuel the jet consumes on a 1150 km mission.

3 0
3 years ago
What type of chemical bond forms between positive and negative ions? (1 point)?
vlada-n [284]

Ionic bond is formed between positive and negative ions.

Positive ion is known as cation (electropositive metal)

Negative ion is known as anion ( electronegative non-metal)

The bond formed between a metal (positive ion) and non-metal (negative ions) is known as Ionic bond.

Ionic form is formed when one or more electrons from the valence shell of an atom (electropositive metal ) are completely transferred to the valence shell of another atom (electronegative non-metal). Ionic bonding is the complete transfer of valence electron(s) between oppositely charged atoms.

For example: Bond between NaCl(sodium chloride) is an ionic bond in which Na (sodium ) is positive ion(metal) which have +1 charge and Cl (chlorine) is negative ion(non-metal) which have -1 charge and the bond formed between Na+ and Cl- is ionic bond.

Na^{+}(positive ion) + Cl^{-}(negative ion)\rightarrow Ionic bond

7 0
3 years ago
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