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Maurinko [17]
3 years ago
14

According to the law of conservation of matter, which statement about chemical reactions is true?

Chemistry
1 answer:
Sholpan [36]3 years ago
7 0
Atoms cannot be created nor desroyed

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A container of gas is heated from 250 k to 303k. What is the new pressure if the initial pressure is 880kpa? (Assume constant vo
Anna [14]
So this is p1 over t1 = p2 over t2. So you do 880/250=x/303 and then cross multiply and divide
8 0
3 years ago
Can someone please help me figure this out
Tom [10]

use the equation PV=nRT and solve the problem

8 0
3 years ago
Why are atoms attracted to each other in an ionic bond?
larisa86 [58]

Answer:

The answer is C. Inversely, when this atom gains a positively charged ion. (The atom) becomes a negatively charged atom or an "anion".

Explanation:

Since electrons are negatively charged, an atom that loses one or more electrons will become positively charged, an atom that gains one or more electrons becomes negatively charged. The oppositely charged ions attract each other to form ionic networks (or lattices)

4 0
3 years ago
Read 2 more answers
Which of the following describes light? (SELECT ALL THAT APPLY.)
iren [92.7K]

Answer:

The light reflects twice before it finally exits the system. Draw a normal at the point of incidence to the first mirror; measure the angle of incidence (45 degrees); then draw a reflected ray at 45 degrees from the normal. Repeat the process for the second mirror.

Explanation:

Hope that helps!

7 0
3 years ago
Calculate the amount of heat (in kJ) required to raise the temperature of a 79.0 g sample of ethanol from 298.0 K to 385.0 K. Th
irina [24]

Answer:

The amount of heat required to raise the temperature of the sample from 298 to 385 Kelvin, is 16.6 kJ

Explanation:

<u>Step 1: </u>Given data

A 79.0 g sample of ethanol raises from 298 K to 385 K

The specific heat of ethanol is 2.42J/g°C

<u>Step 2:</u> Calculate the heat transfer

Q = m*Cp*ΔT

with m = the mass of the ethanol sample (in grams)

⇒ mass = 79 grams

with Cp = the specific heat capacity of ethanol (in J/g°C)

⇒ Cp = 2.42 J/g°C

with ΔT = the change of temperature (T2-T1)

⇒ ΔT = 385 K - 298K = 112 °C - 25 °C = 87

Q = 79 grams * 2.42 J/g°C * 87 = 16632.66 j = 16.6 kJ

The amount of heat required to raise the temperature of the sample from 298 to 385 Kelvin, is 16.6 kJ

4 0
3 years ago
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