7 szkoły podstawowej

8 szkoły podstawowej

Chemia w zadaniach i przykładach. Zbiór zadań dla klas 7 i 8 szkoły podstawowej.

Chemia

Chemia 7

Chemia 7 i 8

Chemia Nowej Ery 7

Ciekawa chemia 7

Świat chemii 7

Dane :&nbsp; Cp1​=45% Cp2​=0% CP​=10% Szukane :&nbsp;

Dane :&nbsp; Cp1​=96% Cp2​=0% Cp​=20% d1​=1,84g/cm3 Szukane :&nbsp;

Dane :&nbsp; Cp1​=95% Cp2​=0% Cp​=70% mr70%​=950g Szukane :&nbsp; mw​=? mr95%​=? Rozwiązanie :&nbsp; &nbsp;<img src="https://prod.odrabiamy-assets.pl/uploads/content_image/image/28224/S/ZOR%2BTYN6gms9hdiYNEuw%3D%3D_721c13c032778e5878a411c10df34be3c8d7221ca95242d1decfb5d069c89d03.jpg"> Zatem :&nbsp; yx​=95%−70%70%−0%​=2570​=514​ Należy rozwiązać układ równań :&nbsp; {x+y=950yx​=514​​ 14+5=19 950:19=50 5⋅50=250g 14⋅50=700g Odpowiedź:&nbsp;Należy zmieszać 250 g wody oraz 700 g roztworu 95-procentowego.

Dane :&nbsp; Cp1​=80% Cp2​=5% mr1​=50g Szukane :&nbsp;

Dane :&nbsp; Cp1​=35% Cp2​=0% Cp​=20% mr20%​=900g Szukane :&nbsp; mw​=? mr35%​=? Rozwiązanie :&nbsp;

Dane :&nbsp; <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/a804817e15755bc9d8044edb15808eb312ca0ba6cb70734c7c2184be3d6f7b2b_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/a804817e15755bc9d8044edb15808eb312ca0ba6cb70734c7c2184be3d6f7b2b_big.svg" type="image/svg+xml"></object> <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/2d9cf6158ba5befd83ae56034ccf8176790d244543a34efd6a5998ccdb5889f4_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/2d9cf6158ba5befd83ae56034ccf8176790d244543a34efd6a5998ccdb5889f4_big.svg" type="image/svg+xml"></object> <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/e6f3cc7d5abcdd5ae301810fdf57b1bc9030f8ce8b8fb4f7649ebe388d44cd97_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/e6f3cc7d5abcdd5ae301810fdf57b1bc9030f8ce8b8fb4f7649ebe388d44cd97_big.svg" type="image/svg+xml"></object> Szukane :&nbsp;

Dane :&nbsp; <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/2238c2fa8cc7488f4360b89d2f62151df521aa2fa2e015f5d41f0fbff9d76257_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/2238c2fa8cc7488f4360b89d2f62151df521aa2fa2e015f5d41f0fbff9d76257_big.svg" type="image/svg+xml"></object> <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/2d9cf6158ba5befd83ae56034ccf8176790d244543a34efd6a5998ccdb5889f4_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/2d9cf6158ba5befd83ae56034ccf8176790d244543a34efd6a5998ccdb5889f4_big.svg" type="image/svg+xml"></object> <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/e8dab02e95af701e4db9c0a11a45c0c99c06a26dc92bd8ce08d2b44485cca5a1_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/e8dab02e95af701e4db9c0a11a45c0c99c06a26dc92bd8ce08d2b44485cca5a1_big.svg" type="image/svg+xml"></object> <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/2108b6d854c78a0af005837282bdec2269668f4db5d1cc2def08fdb6d9411e87_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/2108b6d854c78a0af005837282bdec2269668f4db5d1cc2def08fdb6d9411e87_big.svg" type="image/svg+xml"></object> Szukane :&nbsp;

Dane :&nbsp; <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/d62a02cca24afa1021845c8dd271d416bb087192e8f03eae8f9e06471165fdae_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/d62a02cca24afa1021845c8dd271d416bb087192e8f03eae8f9e06471165fdae_big.svg" type="image/svg+xml"></object> <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/2d9cf6158ba5befd83ae56034ccf8176790d244543a34efd6a5998ccdb5889f4_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/2d9cf6158ba5befd83ae56034ccf8176790d244543a34efd6a5998ccdb5889f4_big.svg" type="image/svg+xml"></object> <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/d1351c5b45d02edb0a1663d910d5f8105d8a37390cdf51a3645875d7781fb043_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/d1351c5b45d02edb0a1663d910d5f8105d8a37390cdf51a3645875d7781fb043_big.svg" type="image/svg+xml"></object> <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/273bcdc679c658bee9d0bb099ee19e9e0e4e1e922892224c6694c057ee3465e8_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/273bcdc679c658bee9d0bb099ee19e9e0e4e1e922892224c6694c057ee3465e8_big.svg" type="image/svg+xml"></object> Szukane :&nbsp; <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/6b7f0919e39d19de6c42beb9f4f0558f0c1681e58e6afbc39a9f2e258ffb0670_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/6b7f0919e39d19de6c42beb9f4f0558f0c1681e58e6afbc39a9f2e258ffb0670_big.svg" type="image/svg+xml"></object> <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/061c12a5e594ea0216e5c72837ca45abbf46e67bb3b897692c3011a6b307c530_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/061c12a5e594ea0216e5c72837ca45abbf46e67bb3b897692c3011a6b307c530_big.svg" type="image/svg+xml"></object> Rozwiązanie :&nbsp; &nbsp;<img src="https://prod.odrabiamy-assets.pl/uploads/content_image/image/28224/S/ZOR%2BTYN6gms9hdiYNEuw%3D%3D_721c13c032778e5878a411c10df34be3c8d7221ca95242d1decfb5d069c89d03.jpg"> Zatem :&nbsp; <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/a4201c1a70ebe997f7c64d13c88dbfb803373a981e664b354442d6f47b3e5038_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/a4201c1a70ebe997f7c64d13c88dbfb803373a981e664b354442d6f47b3e5038_big.svg" type="image/svg+xml"></object> Należy rozwiązać układ równań :&nbsp; <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/4dd1a3f3d41874e140371390e9f42375840bc16f69b856f17accc6ef72c79b51_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/4dd1a3f3d41874e140371390e9f42375840bc16f69b856f17accc6ef72c79b51_big.svg" type="image/svg+xml"></object> <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/bdf34cd3f5eac85e7ec3a4ce7bd34ff4e038e50c605af9df76886f08f30dad64_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/bdf34cd3f5eac85e7ec3a4ce7bd34ff4e038e50c605af9df76886f08f30dad64_big.svg" type="image/svg+xml"></object> <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/d2f95728a177cdfc385c5b9e705456ea453714d737d005398adedc65107babd2_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/d2f95728a177cdfc385c5b9e705456ea453714d737d005398adedc65107babd2_big.svg" type="image/svg+xml"></object> <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/696ee53fd6c6f55606622a26ecda6693ada6a9a6d73c5028ddd9e0c987ee061c_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/696ee53fd6c6f55606622a26ecda6693ada6a9a6d73c5028ddd9e0c987ee061c_big.svg" type="image/svg+xml"></object> <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/d5ae0d53d6bb68c818574f2dde5cd1bb04de124983a4d2d107b8cede87712300_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/d5ae0d53d6bb68c818574f2dde5cd1bb04de124983a4d2d107b8cede87712300_big.svg" type="image/svg+xml"></object> Odpowiedź:&nbsp;Należy zmieszać 250 g wody oraz 700 g roztworu 95-procentowego.

Dane :&nbsp; <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/55b1e80bb7de2b978086565dc7b3df0b4a48d375be4c526bff4a8826d35b0576_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/55b1e80bb7de2b978086565dc7b3df0b4a48d375be4c526bff4a8826d35b0576_big.svg" type="image/svg+xml"></object> <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/eaf044eca90381c2f7fea3f1ce3e790266b19199479032299f5526d7c2b8c01d_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/eaf044eca90381c2f7fea3f1ce3e790266b19199479032299f5526d7c2b8c01d_big.svg" type="image/svg+xml"></object> <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/3badba29b166d8aa82d5ddf1ac68065d17d7e9abdff4db3db5157dca249c345c_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/3badba29b166d8aa82d5ddf1ac68065d17d7e9abdff4db3db5157dca249c345c_big.svg" type="image/svg+xml"></object> Szukane :&nbsp;

Dane :&nbsp; <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/80926aa7a1ac69e227028a0af8f12ea1b51e777ab5cdafd4202ae23a42f7d5d2_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/80926aa7a1ac69e227028a0af8f12ea1b51e777ab5cdafd4202ae23a42f7d5d2_big.svg" type="image/svg+xml"></object> <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/2d9cf6158ba5befd83ae56034ccf8176790d244543a34efd6a5998ccdb5889f4_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/2d9cf6158ba5befd83ae56034ccf8176790d244543a34efd6a5998ccdb5889f4_big.svg" type="image/svg+xml"></object> <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/e8dab02e95af701e4db9c0a11a45c0c99c06a26dc92bd8ce08d2b44485cca5a1_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/e8dab02e95af701e4db9c0a11a45c0c99c06a26dc92bd8ce08d2b44485cca5a1_big.svg" type="image/svg+xml"></object> <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/e550074b67c484a5182fc01d068c2fa1cbc1d2223987f5d409eda834789db9c1_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/e550074b67c484a5182fc01d068c2fa1cbc1d2223987f5d409eda834789db9c1_big.svg" type="image/svg+xml"></object> Szukane :&nbsp; <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/6b7f0919e39d19de6c42beb9f4f0558f0c1681e58e6afbc39a9f2e258ffb0670_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/6b7f0919e39d19de6c42beb9f4f0558f0c1681e58e6afbc39a9f2e258ffb0670_big.svg" type="image/svg+xml"></object> <object class="math small" data="https://odrabiamy.pl/api/v3/math_formulas/cd108116f67e56d405f12752230b5a12ef53e9b1288550ee4cc05012f0c7c5e6_small.svg" type="image/svg+xml"></object><object class="math big" data="https://odrabiamy.pl/api/v3/math_formulas/cd108116f67e56d405f12752230b5a12ef53e9b1288550ee4cc05012f0c7c5e6_big.svg" type="image/svg+xml"></object> Rozwiązanie :&nbsp;

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